Prof. Guillermo J. Tearney Profile

Prof. Guillermo J. Tearney

Professor of Pathology

SPIE Involvement:

Conference Program Committee | Conference Chair | Track Chair | Editor | Author

Publications (120)

Proceedings Article | 19 March 2024 Presentation

OCT tethered capsule endomicroscopy targeted laser capture biopsy for detection of genetic biomarkers of esophageal cancer progression in Barrett’s esophagus patients

Fang Hou, Rachel Smith, Anita Chung, Tara Lignelli, Jansa Zachary, Nitasha G. Bhat, Catriona Grant, Matthew Stachler, Guillermo Tearney

Proceedings Volume PC12820, PC1282007 (2024) https://doi.org/10.1117/12.3008636

KEYWORDS: Biopsy, Esophagus, Cancer, Optical coherence tomography, Endomicroscopy, Target detection, Genetics, Cancer detection, Tissues, Endoscopy

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Proceedings Article | 13 March 2024 Poster

High-speed intravascular NIRF-IVUS imaging for the assessment of atherosclerosis in coronary-sized arteries

Philipp Rauschendorfer, Andrew Thrapp, Guillermo Tearney, Farouc Jaffer

Proceedings Volume 12819, 1281911 (2024) https://doi.org/10.1117/12.3009997

KEYWORDS: Arteries, Atherosclerosis, Intravascular ultrasound, In vivo imaging, Biological imaging, Target detection, Diseases and disorders, Visualization, Tissues, Structural imaging

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Proceedings Article | 13 March 2024 Presentation

Detecting Barrett’s esophagus using a methylene blue fluorescent slurry and a multi-modal optical coherence tomography and fluorescence capsule

Andrew Thrapp, Evaggelia Gavgiotakis, Joseph Gardecki, Andreas Wartak, Catriona Grant, Guillermo Tearney

Proceedings Volume PC12820, PC1282006 (2024) https://doi.org/10.1117/12.3008546

KEYWORDS: Fluorescence, Optical coherence tomography, Esophagus, Endomicroscopy, Tissues, Target detection, Stomach, In vitro testing, Fluorescence spectroscopy, Endoscopy

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Proceedings Article | 13 March 2024 Presentation

First clinical experience with self-propelled retrograde tethered capsule endomicroscopy (R-TCE)

Du-Ri Song, Tara Lignelli, John McDaniel, Alissa Cirio, Ara Bablouzian, Paola Alarcon, Long Nguyen, Rachel Smith, Matthew Beatty, Zachary Jansa, Catriona Grant, Hamed Khalili, Guillermo Tearney

Proceedings Volume PC12820, PC128200E (2024) https://doi.org/10.1117/12.3007956

KEYWORDS: Colon, Optical coherence tomography, Endomicroscopy, Sigmoidoscopy, Visualization, Tissues, 3D image processing, Stereoscopy, Silicon, Rectum

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Proceedings Article | 13 March 2024 Presentation

Should intravascular imaging be considered in complex percutaneous coronary interventions? Insights from randomized clinical studies

Guillermo Tearney

Proceedings Volume 12819, 128190D (2024) https://doi.org/10.1117/12.3024142

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Proceedings Article | 13 March 2024 Presentation

Clinical imaging needs for vulnerable plaque

Guillermo Tearney

Proceedings Volume 12819, 128190F (2024) https://doi.org/10.1117/12.3024144

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Proceedings Article | 13 March 2024 Presentation

Ultra-flexible micro-optical coherence tomography enables visualization of the cellular structures of the human cochlea

Fang Hou, Alejandro Ortega, Seamus Winters, Lillian Wang, Shoumik Lodh, Hinnerk Schulz-Hildebrandt, Konstantina Stankovic, Guillermo Tearney

Proceedings Volume PC12818, (2024) https://doi.org/10.1117/12.3002701

KEYWORDS: Cochlea, Ear, Visualization, Tomography, Physical coherence, Endoscopes, Imaging systems, Diseases and disorders, Diagnostics, Windows

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Proceedings Article | 13 March 2024 Presentation

Micro-optical coherence tomography capsule for sedation-free esophagus imaging

Hinnerk Schulz-Hildebrandt, Oscar Caravaca Mora, Alejandro Ortega, Ashwin Panikkar, Edward Farewell, Guillermo Tearney

Proceedings Volume PC12820, PC128200B (2024) https://doi.org/10.1117/12.3002695

KEYWORDS: Esophagus, Tomography, Optical coherence, Endoscopy, Cancer, Image resolution, Diseases and disorders, Collimators, Spectroscopy, Spatial resolution

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Proceedings Article | 13 March 2024 Presentation + Paper

Multi-spectral analysis of in vivo optical coherence tomography (OCT) images of colon polyps

Costas Pitris, Andrew Thrapp, Guillermo Tearney

Proceedings Volume 12830, 128300M (2024) https://doi.org/10.1117/12.3003424

KEYWORDS: Optical coherence tomography, Polyps, Image fusion, Image classification, Colon, Error control coding, Tunable filters, Tissues, Colorectal cancer, Visualization

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Proceedings Article | 17 March 2023 Presentation

Assessment of heat diffusion in tissue to investigate potential biomedical applications of thermography

Pantea Tavakolian, Daniel Magley, Sudiksha Singhal, Alissa Ann Cirio, Guillermo Tearney

Proceedings Volume PC12358, PC1235804 (2023) https://doi.org/10.1117/12.2651554

KEYWORDS: Tissues, Thermography, Diffusion, Biomedical optics, Inflammation, Thermoelectric materials, Thermal modeling, Infrared radiation, Infrared detectors, Endoscopy

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Proceedings Article | 17 March 2023 Presentation

A portable and minimally invasive human nasal potential difference (NPD) measurement system

David Otuya, Kadambari Vijaykumar, Sophia Zoghbi, Nicolas Dechene, Emily Ryan, Sarah Silva, Heather Harthone, Catriona Grant, Steven Rowe, Marty Solomon, Guillermo Tearney

Proceedings Volume PC12356, PC1235604 (2023) https://doi.org/10.1117/12.2650620

KEYWORDS: Electrodes, Optical coherence tomography, Modulation, Ion channels, Cystic fibrosis, Bridges, Visualization, Tolerancing, Resistance, Proteins

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Proceedings Article | 17 March 2023 Presentation

A minimally invasive tethered capsule endomicroscopy and biopsy platform

Andrew Thrapp, Rachel Shore, Tyler Rhim, David Otuya, Tara Lignelli, Matt Beatty, Rachel Smith, Gary Tearney

Proceedings Volume PC12356, PC123560I (2023) https://doi.org/10.1117/12.2650048

KEYWORDS: Biopsy, Tissues, Optical coherence tomography, Endomicroscopy, In vivo imaging, Cancer, Esophagus, Video, Target acquisition, Statistical analysis

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Proceedings Article | 17 March 2023 Presentation

Unsedated transnasal optical coherence tomography imaging in healthy pregnant women

Evangelia Gavgiotakis, David Otuya, Rachel Shore, Alissa Cirio, Tyler Rihm, Alexander Krall, Peter Choy, Sarah Giddings, Anita Chung, Catriona Grant, Paola Leon Alarcon, Ara Bablouzian, Matthew Beatty, Guillermo Tearney

Proceedings Volume PC12356, PC1235606 (2023) https://doi.org/10.1117/12.2652751

KEYWORDS: Optical coherence tomography, Coherence imaging, Optical imaging, Visualization, Stomach, Esophagus, Tissues, Safety, Polyurethane, Nose

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Proceedings Article | 17 March 2023 Presentation

Tethered capsule endomicroscopy–guided tissue sampling of the GI tract by in vivo laser capture microdissection

Fang Hou, Rachel Smith, Tara Lignelli, Ara Bablouzian, Shwaathi Deenadayalan, Tianxia Li, Adam Bass, Guillermo Tearney

Proceedings Volume PC12356, PC123560J (2023) https://doi.org/10.1117/12.2650965

KEYWORDS: In vivo imaging, Laser tissue interaction, Optical coherence tomography, Coating, Biopsy, Tissues, Imaging systems, Tomography, Tissue optics, Statistical analysis

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Proceedings Article | 17 March 2023 Presentation

3D printed freeform micro-optics for OCT coronary tissue imaging

Radhika Poduval, Fang Hou, Alejandro Ortega, Shoumik Lodh, Aditya Kumar, Ashwin Panikkar, Hinnerk Schulz-Hildebrandt, Lillian Wang, Joseph Gardecki, Farouc Jaffer, Guillermo Tearney

Proceedings Volume PC12356, PC123560D (2023) https://doi.org/10.1117/12.2651300

KEYWORDS: Tissues, Micro optics, 3D image processing, Optical coherence tomography, Tomography, Stereoscopy, Fiber optics, Visualization, Optics manufacturing, Optical components

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Proceedings Article | 17 March 2023 Presentation

1060-nm compact SECM system with tethered endoscopic capsule for esophageal imaging in vivo.

Junyoung Kim, Edward Farewell, Sung-Bin Yun, Abhishek Srinivas, Paola Leon Alarcon, Sydney Kutowy, Abigail Gregg, Guillermo Tearney

Proceedings Volume PC12356, PC123560K (2023) https://doi.org/10.1117/12.2652331

KEYWORDS: Imaging systems, In vivo imaging, Endoscopy, Tissues, Esophagus, Confocal microscopy, Visualization, Objectives, Monochromatic aberrations, Manufacturing

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Proceedings Article | 17 March 2023 Presentation

High-resolution OCT probe as the stylet of cochlea implant for intraoperative imaging during the cochlear implant surgery

Fang Hou, Alejandro Ortega, Radhika Poduval, Shoumik Lodh, Lillian Wang, Varun Sagi, Konstantina Stankovic, Guillermo Tearney

Proceedings Volume PC12356, PC123560B (2023) https://doi.org/10.1117/12.2651786

KEYWORDS: Optical coherence tomography, Surgery, Sensors, Therapeutics, Optical components, Modulation, Metals, Interfaces, Imaging systems, Ear

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Proceedings Article | 15 March 2023 Presentation

Micro-optical coherence tomography-confocal fluorescence microscopy (µOCT-FCM) for probing cystic fibrosis pathogenesis (Conference Presentation)

Linhui Yu, Courtney Petty, Hui Min Leung, Susan Birket, Steven Rowe, Guillermo Tearney

Proceedings Volume PC12383, PC123830B (2023) https://doi.org/10.1117/12.2650168

KEYWORDS: Luminescence, Pathogens, Cystic fibrosis, Microscopy, Optical coherence tomography, Liquids, Visualization, Tissues, Scanners, Optical filters

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Proceedings Article | 9 March 2023 Presentation

Self-propelled retrograde tethered capsule endomicroscopy (R-TCE) in the colon

Du-Ri Song, Tara Lignelli, Mikayla Tinus, Evan Sevieri, Patricia Grahmann, John McDaniel, Alissa Cirio, Paola Alarcon, Seamus Winters, Hamed Khalili, Abigail Gregg, David Otuya, Jing Dong, Adam Mauskapf, Joseph Gardecki, Andrew Thrapp, Guillermo Tearney

Proceedings Volume PC12367, PC1236702 (2023) https://doi.org/10.1117/12.2652740

KEYWORDS: Colon, Endomicroscopy, Optical coherence tomography, Imaging devices, Image segmentation, 3D image processing, X-rays, X-ray imaging, Visualization, Stereoscopy

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Proceedings Article | 8 March 2023 Presentation + Paper

Morphological segmentation and fractal analysis for the classification of colon polyps from en face optical coherence tomography (OCT) images

Costas Pitris, Andrew Thrapp, Guillermo Tearney

Proceedings Volume 12367, 123670R (2023) https://doi.org/10.1117/12.2652126

KEYWORDS: Image segmentation, Optical coherence tomography, Polyps, Image classification, Fractal analysis, Colon, Image processing

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Proceedings Article | 7 March 2023 Presentation

Advancements in dynamic micro-optical coherence tomography for cell phenotyping

Hui Min Leung, Linhui Yu, Zhewei Wang, Zuzana Tatarova, Miquela Murray, Anagha Arvind, Amilcar Barrios, Estelle Danielle Sylvie Chiavassa, Sydney Kutowy, Hinnerk Schulz-Hildebrandt, Abigail Gregg, Joseph Gardecki, Oliver Jonas, Markus Herrmann, Guillermo Tearney

Proceedings Volume PC12378, PC1237801 (2023) https://doi.org/10.1117/12.2649046

KEYWORDS: Tomography, Tissues, Tumors, Machine learning, RGB color model, Principal component analysis, Neural networks, Mouse models, Lymphatic system, Feature extraction

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Proceedings Article | 6 March 2023 Presentation

Co-localized micro-optical coherence tomography-fluorescence confocal microscopy (µOCT-FCM)

Linhui Yu, Hui Leung, Courtney Petty, Anagha Arvind, Miquela Murray, Susan Birket, Steven Rowe, Guillermo Tearney

Proceedings Volume PC12371, PC1237101 (2023) https://doi.org/10.1117/12.2649211

KEYWORDS: Confocal microscopy, Optical coherence tomography, Luminescence, Imaging systems, Optical design, Image resolution, Genomics, Tomography, Tissues, Tissue optics

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Proceedings Article | 9 March 2022 Presentation

High-resolution intranasal micro-optical coherence tomography (µOCT) imaging of Covid-19 positive human subjects

Hui Min Leung, Kadambari Vijaykumar, George Solomon, Amilcar Barrios, Susan Birket, Heather Hathorne, Justin Wade, Kathryn Monroe, Katie Slaten, Sam Foster, Doug Marsden, Paul Currier, Kristian Olson, Steven Rowe, Guillermo Tearney

Proceedings Volume PC11949, PC119490E (2022) https://doi.org/10.1117/12.2607192

KEYWORDS: Coherence imaging, Tomography, Human subjects, Coherence (optics), Pathophysiology, In vivo imaging, Control systems

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Proceedings Article | 7 March 2022 Presentation

Safety study of tethered capsule endomicroscopy (TCE) pull back through long segments of the small intestine

Du-Ri Song, Mikayla Tinus, Patricia Grahmann, Jing Dong, Abigail Gregg, David Otuya, Tara Lignelli, Evan Sevieri, Joseph Gardecki, Guillermo Tearney

Proceedings Volume PC11937, PC119370O (2022) https://doi.org/10.1117/12.2612623

KEYWORDS: Intestine, Safety, Endomicroscopy, Image segmentation, In vivo imaging, Abdomen

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Proceedings Article | 7 March 2022 Presentation

Extended depth of field in OCT by self-imaging wavefront division with the mirror tunnel

Conor Sheil, Andreas Wartak, Graham L. Spicer, Guillermo Tearney

Proceedings Volume PC11937, PC1193704 (2022) https://doi.org/10.1117/12.2609900

KEYWORDS: Mirrors, Optical coherence tomography, Focus stacking, Wavefronts, Image resolution, Space operations, Space mirrors, Optical simulations, Endoscopy, Beam propagation method

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Proceedings Article | 7 March 2022 Presentation

Feasibility and safety of tethered capsule endomicroscopy in studying the natural history of Barrett’s esophagus: a multi-center study

Jing Dong, Catriona Grant, Barry Vuong, Norman Nishioka, Anna Huizi Gao, Matthew Beatty, Grace Baldwin, Aaron Bailargeon, Ara Bablouzian, Patricia Grahmann, Nitasha G. Bhat, Emily Ryan, Amilcar Barrios, Paola Leon Alarcon, Sarah Giddings, Tim Ford, Émilie Beaulieu-Ouellet, Seyed Hamid Hosseiny, Irene Lerman, Wolfgang Trasischker, Rohith Reddy, Kanwarpal Singh, Michalina Gora, Daryl Hyun, Lucille Quénéhervé, Michael Wallace, Wolfsen Herbert, Prateek Sharma, Kenneth Wang, Cadman Leggett, John Poneros, Julian Abrams, Charles Lightdale, Samantha Leeds, Mireille Rosenberg, Guillermo Tearney

Proceedings Volume PC11937, PC119370N (2022) https://doi.org/10.1117/12.2610595

KEYWORDS: Esophagus, Optical coherence tomography, Endoscopy, Endomicroscopy, Safety, Tissues, Imaging systems, Biopsy, Diagnostics, Yield improvement

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Proceedings Article | 7 March 2022 Presentation

OCT image guidance for gastrointestinal endoscopic cryobiopsy

Radhika Poduval, David Otuya, Shoumik Lodh, Seth Judson, Darina Postupaka, Abigail Gregg, Guillermo Tearney

Proceedings Volume PC11937, PC119370I (2022) https://doi.org/10.1117/12.2612714

KEYWORDS: Optical coherence tomography, Tissues, Endoscopy, Biopsy, Visualization, Tissue optics, Image segmentation

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Proceedings Article | 7 March 2022 Presentation

Characterizing subepithelial remodeling in eosinophilic esophagitis with PS-μOCT

Conor Sheil, Andreas Wartak, Joseph Gardecki, Abigail Gregg, Guillermo Tearney

Proceedings Volume PC11937, PC119370J (2022) https://doi.org/10.1117/12.2609948

KEYWORDS: Esophagus, Collagen, Endoscopy, Biopsy, Visualization, Tomography, Tissues, Statistical modeling, Optical coherence tomography, Microscopy

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Proceedings Article | 7 March 2022 Presentation

Intravascular dual-modality optical coherence tomography and multichannel near-infrared fluorescence inflammation imaging with the cathepsin-activatable LUM015 imaging agent

Andrew Thrapp, Mohamad Kassab, Joseph Gardecki, Osman Ahsen, Yoichiro Kawamura, Adam Mauskapf, Graham Spicer, Evangelia Gavgiotaki, Aditya Kumar, Maya Modi, Ara Bablouzian, Paola Leon, Aidan Burbridge, Benjamin Childs, Farouc Jaffer, Guillermo Tearney

Proceedings Volume PC11936, PC1193602 (2022) https://doi.org/10.1117/12.2605295

KEYWORDS: Optical coherence tomography, Luminescence, Inflammation, Imaging systems, In vivo imaging, Visualization, Tomography, Target detection, Fluorescence spectroscopy, Coherence (optics)

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Proceedings Article | 7 March 2022 Presentation

Micro-optical coherence tomography catheter for endomicroscopy of the human cochlea

Fang Hou, Alejandro Enrique Ortega, Seamus Scott Winters, Janani Iyer, Alyssa Brown, Victoria Anelia Mathieu, Konstantina Stankovic, Guillermo Tearney

Proceedings Volume PC11937, PC1193702 (2022) https://doi.org/10.1117/12.2608831

KEYWORDS: Tomography, Endomicroscopy, Sensors, Pathology, Tissues, Prototyping, Optical coherence tomography, In vivo imaging, Ear, Diagnostics

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Proceedings Article | 7 March 2022 Presentation

3D printed micro-optics for astigmatism correction in catheter-based endoscopic imaging

Evangelia Gavgiotaki, Radhika Poduval, David Otuya, Alissa Cirio, Shoumik Lodh, Tyler Rihm, Rachel Shore, Peter Choy, Sarah Silva, Alexander Krall, Paola Leon Alarcon, Patricia Grahmann, Osman Ahsen, Guillermo Tearney

Proceedings Volume PC11937, PC1193701 (2022) https://doi.org/10.1117/12.2607309

KEYWORDS: Monochromatic aberrations, Micro optics, Optical coherence tomography, Endoscopy, 3D image processing, Stereoscopy, Lenses, Image quality standards, Zemax, Optics manufacturing

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Proceedings Article | 7 March 2022 Presentation

Magnetomotive micro-optical coherence tomography (μOCT) microrheology for probing cystic fibrosis mucus viscoelastic properties in-situ

Linhui Yu, Hui Min Leung, Courtney Petty, Daiqin Chen, Jung Soo Suk, Susan Birket, Steven Rowe, Guillermo Tearney

Proceedings Volume PC11964, PC119640F (2022) https://doi.org/10.1117/12.2605819

KEYWORDS: Tomography, Optical coherence tomography, Cystic fibrosis, Magnetism, Particles, Nanoparticles, Video, Motion models, MATLAB, Image analysis

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Proceedings Article | 7 March 2022 Presentation

Design and optimization of improved-resolution extended depth-of-field optical coherence tomography probes for imaging in swine esophagus

Chukwuemeka Okoro, Rachel Smith, Nitasha Bhat, Guillermo Tearney, Oscar Caravaca Mora

Proceedings Volume PC11951, PC119510G (2022) https://doi.org/10.1117/12.2609792

KEYWORDS: Optical coherence tomography, Esophagus, Optical design, Waveguides, Wave propagation, Spatial frequencies, Performance modeling, Optimization (mathematics), Optical simulations, Near field

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Proceedings Article | 5 March 2021 Presentation + Paper

Accuracy of catheter-based near-infrared auto-fluorescence detection in human coronary plaques

Mie Kunio, Joseph Gardecki, Kohei Watanabe, Kensuke Nishimiya, Daisuke Yamada, Sarika Verma, Guillermo Tearney

Proceedings Volume 11621, 116210J (2021) https://doi.org/10.1117/12.2582533

KEYWORDS: Confocal microscopy, Imaging systems, Optical coherence tomography, Signal detection, Gold, Arteries

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Proceedings Article | 5 March 2021 Presentation

Non-invasive tethered capsule endomicroscopy imaging biomarkers for the diagnosis of the celiac disease from unsedated patients

Girish G. N., Paola A. Leon Alarcon, Amilcar Barrios, David O. Otuya, Jing Dong, Sarah Giddings, Nitasha Mudalaje, Catriona Grant, Joseph Gardecki, Norman Nishioka, Christopher Damman, Guillermo Tearney

Proceedings Volume 11620, 1162003 (2021) https://doi.org/10.1117/12.2584550

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Proceedings Article | 5 March 2021 Presentation

Advancement of magnetomotive micro optical coherence tomography (μOCT) microrheology for probing mucus viscoelastic properties

Linhui Yu, Anna Khimchenko, Hui Min Leung, Susan Birket, Steven Rowe, Guillermo Tearney

Proceedings Volume 11647, 1164712 (2021) https://doi.org/10.1117/12.2576335

KEYWORDS: Optical coherence tomography, Magnetism, Scattering, Interfaces, Data acquisition, Cystic fibrosis

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Proceedings Article | 5 March 2021 Presentation + Paper

Evaluation of machine learning techniques for Barret’s and dysplasia discrimination of the esophagus from in vivo optical coherence tomography images

Christos Photiou, George Plastiras, Guillermo Tearney, Costas Pitris

Proceedings Volume 11630, 116300T (2021) https://doi.org/10.1117/12.2578875

KEYWORDS: Optical coherence tomography, Machine learning, In vivo imaging, Esophagus, Tissues, Image segmentation, Image classification, Dispersion, Neural networks, Feature extraction

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Proceedings Article | 5 March 2021 Presentation

Development of a clinical intravascular dual-modality optical coherence tomography and near-infrared autofluorescence/fluorescence imaging platform

Osman Ahsen, Zhonglie Piao, Aditya Kumar, Ara Bablouzian, Jia Liu, Mason Schellenberg, Paola Leon Alarcon, Andreas Wartak, Matthew Beatty, Benjamin Child, Adam Mauskapf, Mazen Albaghdadi, Ryutaro Ikegami, Sarah Giddings, Joseph Gardecki, Victoria Mathieu, Farouc Jaffer, Guillermo Tearney

Proceedings Volume 11621, 116210O (2021) https://doi.org/10.1117/12.2577841

KEYWORDS: Optical coherence tomography, Luminescence, Imaging systems, Tissues, Process control, Near infrared, Visualization, Standards development, Lens design, Control systems

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Proceedings Article | 5 March 2021 Poster + Presentation

Screening for Barrett’s Esophagus in the primary care setting using tethered capsule endomicroscopy

Anita Chung, Anna Gao, Catriona Grant, Emily Ryan, Nitasha Bhat, Alfred Kyrollos Kelada, Amilcar Pojoy Barrios, Jing Dong, Aaron Baillargeon, Patricia Grahmann, Mikayla Tinus, Ara Bablouzian, Rachel Smith, Joshua Metlay, Leigh Simmons, Karen Blumenthal, Donna Krauth, Luis Henkel, Andrew Fauteux, Emily Brown, Katherine Wolcott, Guillermo Tearney

Proceedings Volume 11620, 116200H (2021) https://doi.org/10.1117/12.2577743

KEYWORDS: Optical coherence tomography, Esophagus, Endomicroscopy, Image segmentation, Microscopy

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Proceedings Article | 5 March 2021 Presentation

Multimodality optical coherence tomography based tethered capsule endomicroscopy for upper gastrointestinal tract imaging

Andreas Wartak, Yuxiao Wei, Ara Bablouzian, Paola Leon Alarcon, Keval Bollavaram, Osman Ahsen, Edward Farewell, Schuyler VanTol, Alfred Kelada, Abigail Gregg, Aaron Baillargeon, Patricia Grahmann, Joseph Gardecki, Guillermo Tearney

Proceedings Volume 11630, 116300P (2021) https://doi.org/10.1117/12.2582536

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Proceedings Article | 5 March 2021 Presentation

Applications of dynamic micro-optical coherence tomography

Hui Min Leung, Linhui Yu, Devon Thompson, Yi Sun, Abigail Gregg, Joseph Gardecki, Russell Jenkins, Oliver Jonas, Guillermo Tearney

Proceedings Volume 11630, 116301A (2021) https://doi.org/10.1117/12.2583649

KEYWORDS: Tomography, Tissues, Image resolution, 3D image processing, Video, Skin, Optical coherence tomography, Mode conditioning cables, Microscopy, Melanoma

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Proceedings Article | 5 March 2021 Poster + Presentation

Tethered capsule endomicroscopy-guided sampling of pancreatic fluid

Victoria Gonzalez-Canalle, David Otuya, Joseph Gardecki, Jing Dong, Guillermo Tearney

Proceedings Volume 11620, 116200G (2021) https://doi.org/10.1117/12.2583650

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Proceedings Article | 5 March 2021 Presentation

Location-aware optical coherent tomography (OCT) tethered capsule endomicroscopy (TCE) of the small intestine

Du-Ri Song, David Odeke Otuya, Markus Herrmann, Camille Cunin, Patricia Grahmann, Mikayla Farham Tinus, Sarah Lynn Giddings, Guillermo Tearney

Proceedings Volume 11620, 1162006 (2021) https://doi.org/10.1117/12.2582910

KEYWORDS: Optical coherence tomography, Intestine, Endomicroscopy, Tomography, Data modeling, Machine learning, Imaging devices, Algorithm development, Pathology, Inflammation

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SPIE Journal Paper | 10 February 2021 Open Access

Improved sensitivity roll-off in dual reference, buffered spectral-domain optical coherence tomography

David Otuya, Yogesh Verma, Romain Luu, Hamid Farrokhi, Guillermo Tearney

JBO, Vol. 26, Issue 02, 025001, (February 2021) https://doi.org/10.1117/12.10.1117/1.JBO.26.2.025001

KEYWORDS: Interferometers, Optical coherence tomography, Imaging systems, In vivo imaging, Colon, Spectroscopy, Tissues, Ranging, Range imaging, Tissue optics

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Proceedings Article | 9 March 2020 Presentation

Pilot study of micro optical coherence tomography for detection of invasive and pre-invasive cervical lesions (Conference Presentation)

Elham Abouei, Joseph Gardecki, Michele Follen, Calum MacAulay, Jed Cutler, Lisa Ricketts-Holcomb, Guillermo Tearney

Proceedings Volume 11234, 1123412 (2020) https://doi.org/10.1117/12.2542961

KEYWORDS: Optical coherence tomography, Biopsy, Diagnostics, Biological research, Electronic test equipment, Scanners, Visualization, Image visualization

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Proceedings Article | 21 February 2020 Presentation + Paper

Comparison of classification methods of Barret’s and dysplasia in the esophagus from in vivo optical coherence tomography images

Christos Photiou, George Plastiras, Guillermo Tearney, Costas Pitris

Proceedings Volume 11228, 1122820 (2020) https://doi.org/10.1117/12.2546299

KEYWORDS: Optical coherence tomography, Esophagus, Image segmentation, In vivo imaging, Tissues, Image classification, Dispersion, Algorithm development, Machine learning, Neural networks

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Proceedings Article | 7 March 2019 Presentation

High-resolution micro-OCT for endothelial cell visualization in the coronary arteries (Conference Presentation)

Kensuke Nishimiya, Osman Ahsen, Biwei Yin, Zhonglie Piao, Jiheun Ryu, Hany Osman, Gargi Sharma, Hui Min Leung, Chia-Pin Liang, Joseph Gardecki, Guillermo Tearney

Proceedings Volume 10855, 1085502 (2019) https://doi.org/10.1117/12.2506264

KEYWORDS: Arteries, Visualization, Image segmentation, Scanning electron microscopy, Image resolution, Imaging technologies, Coherence (optics), Tomography, 3D image processing, Image processing

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Proceedings Article | 4 March 2019 Presentation

Preclinical swine joint imaging using forward-viewing spectrally encoded endoscopy (Conference Presentation)

Adel Zeidan, Jiheun Ryu, Dukho Do, DongKyun Kang, Mitsuhiro Ikuta, Guillermo Tearney

Proceedings Volume 10854, 108540V (2019) https://doi.org/10.1117/12.2507889

KEYWORDS: Endoscopy, Preclinical imaging, Optical fibers, Computer programming, Surveillance, Optical design, Light wave propagation, Multimode fibers, Polishing, Detector arrays

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Proceedings Article | 4 March 2019 Presentation

Minimally invasive trans-nasal biopsy of the small intestine (Conference Presentation)

David Otuya, Hamid Farrokhi, Jing Dong, Rachel Shore, Mason Schellenberg, Sarah Giddings, Nitasha Mudalaje, Catriona Grant, Aaron Baillargeon, Joseph Gardecki, Norman Nishioka, Christopher Damman, Guillermo Tearney

Proceedings Volume 10854, 108540M (2019) https://doi.org/10.1117/12.2510447

KEYWORDS: Biopsy, Intestine, Endoscopy, Optical coherence tomography, Metals, Absorption, Diagnostics, Gold, In vivo imaging, Tissues

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Proceedings Article | 4 March 2019 Presentation

Natural history of Barrett’s esophagus using tethered capsule OCT endomicroscopy and portable OCT imaging system: initial experience (Conference Presentation)

Jing Dong, Barry Vuong, Timothy Ford, Matthew Beatty, Seyed Hamid Hosseiny, Emilie Beaulieu-Ouellet, Rohith Reddy, Kanwarpal Singh, Hany Osman, Catriona Grant, Anna Huizi Gao, Samantha Leeds, Norman Nishioka, John Poneros, Julian Abrams, Charles Lightdale, Prateek Sharma, Michael Wallace, Herbert Wolfsen, Kenneth Wang, Cadman Leggett, Mireille Rosenberg, Guillermo Tearney

Proceedings Volume 10867, 108670T (2019) https://doi.org/10.1117/12.2511523

KEYWORDS: Optical coherence tomography, Esophagus, Imaging systems, Endomicroscopy, Endoscopy, Biopsy, 3D image processing, Clinical trials, Image resolution, Tissues

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While the most common method used to evaluate and survey patients with Barrett’s Esophagus (BE) is endoscopic biopsy, this procedure is invasive, time-consuming, and suffers from sampling errors. Moreover, it requires patient sedation that increases cost and mandates its operation in specialized settings. Our lab has developed a new imaging tool termed tethered capsule endomicroscopy (TCE) that involves swallowing a tethered capsule which utilizes optical coherence tomography (OCT) to obtain three-dimensional microscopic (10µm) images of the entire esophageal wall as it traverses the luminal organ via peristalsis or is retrieved by pulling up tether. As opposed to endoscopy, TCE procedure is non-invasive, doesn’t require patient sedation and mitigates sampling error by evaluating the microscopic structure of the entire esophagus. The merits of TCE make it a suitable device to investigate the microscopic natural history of BE in a longitudinal manner. Here, we present our initial experience of a multicenter (5-site) clinical trial to study the microscopic natural history of BE. The TCE device used for the study is the new generation capsule with the ball lens optical configuration and a distal scan stepper motor, which provides 30µm (lateral) resolution and 40Hz imaging rate. The portable OCT imaging system is a custom in-house built swept source system and provides 7µm (axial) at a 100 kHz A-line rate with a center wavelength of ~1310 nm. To date, we have successfully enrolled 69 subjects at all sites (MGH: 33, Columbia University: 11, Kansas City VA: 10, Mayo Jacksonville: 8, Mayo Rochester: 7) and 59 have swallowed the capsule (85.5%). There have been no reported adverse events associated with TCE procedure. High-quality OCT images were reliably obtained from patients who swallowed the device, and BE tissues were identified by expert readers. Our initial experience with TCE in a multicenter study demonstrates that this technology is easy to use and efficient in multiple clinical settings. Completion of this longitudinal study is likely to provide new insights on the temporal progression of BE that may impact management strategies.

Proceedings Article | 4 March 2019 Presentation

Transnasal introduction catheter, a new platform for imaging and biopsying the gastrointestinal (GI) tract (Conference Presentation)

Hamid Farrokhi, Jing Dong, David Otuya, Yogesh Verma, Sarah Zemlok, Aditya Kumar, Rachel Shore, Sarah L. Giddings, Nitasha G. Bhat, Omair Shakil, Catriona Grant, Norman Nishioka, Mireille Rosenberg, Christopher Damman, Guillermo Tearney

Proceedings Volume 10854, 108540L (2019) https://doi.org/10.1117/12.2510381

KEYWORDS: Endoscopy, Biopsy, Optical coherence tomography, Stomach, Endomicroscopy, Tissues, Visualization, Francium, Real time imaging, Liquids

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Proceedings Article | 4 March 2019 Presentation

Duodenal imaging by tethered capsule OCT endomicroscopy in adolescents with environmental enteric dysfunction (Conference Presentation)

Jing Dong, Kamran Sadiq, Catriona Grant, Omair Shakil, David Otuya, Hamid Farrokhi, Anna Gao, Nitasha Bhat, Sarah Giddings, Kumail Ahmed, Seema Rani, Mireille Rosenberg, Alessio Fasano, Christopher Damman, Asad Ali, Guillermo Tearney

Proceedings Volume 10854, 1085408 (2019) https://doi.org/10.1117/12.2513965

KEYWORDS: Optical coherence tomography, Endomicroscopy, Intestine, Endoscopy, Inflammation, Biopsy, 3D image processing, Visualization, Control systems

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Environmental Enteric Dysfunction (EED) is a poorly understood condition of the small intestine that is prevalent in regions of the world with inadequate sanitation and hygiene. EED affects 25% of all children globally and causes over a million deaths each year. The condition is associated with increased intestinal permeability, bacterial translocation, inflammation and villous blunting. The loss of absorptive area and intestinal function leads to nutrient malabsorption, with long term outcomes characterized by stunted growth and neurocognitive development. Currently, the only way to directly evaluate the morphology of the intestine is endoscopy with mucosal biopsy. Yet because EED is endemic in low and middle-income countries, endoscopy is untenable for studying EED. As a result, the diagnosis of EED and the assessment of the efficacy of EED interventions is hampered by an inability to evaluate the intestinal mucosa. Our lab has previously developed a technology termed tethered capsule OCT endomicroscopy (TCE). The method involves swallowing an optomechanically-engineered pill that generates 3D images of the GI tract as it traverses the lumen of the organ via peristalsis, assisted by gravity. In order to study the potential of using TCE to investigate EED, we initiated and conducted a TCE study in adolescents at Aga Khan Medical Center in Pakistan. To make swallowing easier, the tethered capsule’s size was reduced from 11x25 mm to 8x22 mm. Villous morphologic visualization was enhanced by building a notch (x mm deep, y mm wide) in the capsule’s imaging window. To date, 26 Pakistani subjects with ages ranging from 14 to 18 y/o (16.4 +/- 1.0) have been enrolled and imaged. A total of 19 subjects were able to swallow the capsule. Of those, 9 successfully passed through the pylorus, allowing successful microscopic imaging of the entire duodenum. There were no adverse events in any of the cases. Maximum villous height and width were measured from 3 randomly chosen, representative frames from each Pakistan subject as well as a matching number from US controls. Preliminary results, comparing Pakistani vs US villous morphology, indicated that subjects from Pakistan have shorter (628.6 +/- 22.0 um and 492.3 +/- 13.2 um, respectively, p< 0.0001) and wider duodenal villi (244.9 +/- 8.8 um and 293.4 +/- 13.2 um, respectively, p< 0.0001). These findings suggest that OCT TCE of the duodenum may be a useful tool for evaluating villous morphology in EED.

Proceedings Article | 14 March 2018 Presentation

Cellular-resolution, extended depth of focus optical coherence tomography catheter toward in vivo cardiovascular imaging (Conference Presentation)

Biwei Yin, Zhonglie Piao, Chulho Daryl Hyun, Kensuke Nishimiya, Joseph Gardecki, Guillermo Tearney

Proceedings Volume 10471, 104710B (2018) https://doi.org/10.1117/12.2288747

KEYWORDS: Optical coherence tomography, In vivo imaging, Arteries, Gaussian beams, Cardiovascular magnetic resonance imaging, Wavefronts, Endoscopy, Fiber optics, Visualization, Image resolution

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Proceedings Article | 14 March 2018 Presentation

Forward-viewing spectrally encoded endoscopy with angled detection optics (Conference Presentation)

Adel Zeidan, Dukho Do, DongKyun Kang, Mitsuhiro Ikuta, Guillermo Tearney

Proceedings Volume 10470, 104700S (2018) https://doi.org/10.1117/12.2285202

KEYWORDS: Endoscopy, Optical fibers, Computer programming, Surveillance, Optical design, Light wave propagation, Multimode fibers, Polishing, Detector arrays, Spectroscopy

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Proceedings Article | 14 March 2018 Presentation

Micro optical coherence tomography probe for high resolution imaging of the inner ear (Conference Presentation)

Gargi Sharma, Janani Iyer, Kanwarpal Singh, Guillermo Tearney

Proceedings Volume 10470, 104700K (2018) https://doi.org/10.1117/12.2294623

KEYWORDS: Image resolution, Ear, Optical coherence tomography, Sensors, Visualization, Pathology, Bone, Coherence (optics), Tomography, Imaging technologies

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Proceedings Article | 14 March 2018 Presentation

Contrast enhancement of microscopic birefringent crystals using polarization sensitive micro-optical coherence tomography (Conference Presentation)

Gargi Sharma, Kanwarpal Singh, Kensuke Nishimiya, Joseph Gardecki, Guillermo Tearney

Proceedings Volume 10471, 104710X (2018) https://doi.org/10.1117/12.2295819

KEYWORDS: Crystals, Polarization, Tomography, Arteries, Image enhancement, Single mode fibers, Image contrast enhancement, Optical coherence tomography, Spectroscopy, Light sources

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Proceedings Article | 14 March 2018 Presentation

Dispersion estimation and compensation in optical coherence tomography (Conference Presentation)

Kanwarpal Singh, Gargi Sharma, Biwei Yin, Guillermo Tearney

Proceedings Volume 10486, 104860M (2018) https://doi.org/10.1117/12.2291336

KEYWORDS: Optical coherence tomography, Light sources, Signal to noise ratio, Silica

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Proceedings Article | 14 March 2018 Presentation

Optical coherence tomography-guided laser marking with tethered capsule endomicroscopy (Conference Presentation)

Chia-Pin Liang, Jing Dong, Timothy Ford, Rohith Reddy, Seyed Hamid Hosseiny Darbrazi, Hamid Farrokhi, Matthew Beatty, Kanwarpal Singh, Barry Vuong, Emilie Beaulieu-Ouellet, Catriona Grant, Sarah Giddings, Mireille Rosenberg, Norman Nishioka, Guillermo Tearney

Proceedings Volume 10470, 104700X (2018) https://doi.org/10.1117/12.2287843

KEYWORDS: Laser marking, Optical coherence tomography, Endomicroscopy, Endoscopy, Laser optics, Coherence (optics), Esophagus, Cancer, Surveillance, Diagnostics

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Proceedings Article | 14 March 2018 Presentation

Trans-nasal OCT imaging of the small intestine (Conference Presentation)

David Otuya, Yogesh Verma, Jing Dong, Hamid Farrokhi, Sarah Giddings, Nitasha G. Bhat, Omair Shakil, Catriona Grant, Guillermo Tearney

Proceedings Volume 10470, 104700Z (2018) https://doi.org/10.1117/12.2290732

KEYWORDS: Optical coherence tomography, Intestine, Coherence imaging, Francium, Imaging devices

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Proceedings Article | 14 March 2018 Presentation

Visualizing cellular markers of sensorineural hearing loss in the murine cochlea using micro-optical coherence tomography (Conference Presentation)

Janani Iyer, Gargi Sharma, Guillermo Tearney, Konstantina Stankovic

Proceedings Volume 10469, 104690R (2018) https://doi.org/10.1117/12.2288733

KEYWORDS: Visualization, Optical coherence tomography, Therapeutics, Sensors, Coherence (optics), Tomography, Ear, Tissues, Pathology, Interferometry

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Proceedings Article | 14 February 2018 Paper

Automated detection of esophageal dysplasia in in vivo optical coherence tomography images of the human esophagus

Michalis Kassinopoulos, Jing Dong, Guillermo Tearney, Costas Pitris

Proceedings Volume 10483, 104830R (2018) https://doi.org/10.1117/12.2289612

KEYWORDS: Optical coherence tomography, Esophagus, Tissues, In vivo imaging, Image segmentation, Data acquisition, Endoscopy, Biopsy, Intelligence systems, Imaging systems

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Proceedings Article | 24 April 2017 Presentation

Use of micro-optical coherence tomography to analyze barrier integrity of intestinal epithelial cells (Conference Presentation)

Avira Som, Hui Min Leung, Kengyeh Chu, Alex Eaton, Bryan Hurley, Guillermo Tearney

Proceedings Volume 10068, 1006809 (2017) https://doi.org/10.1117/12.2252727

KEYWORDS: Pathogens, Tomography, Resistance, Optical coherence tomography, Digestive system, Stomach, Image resolution, Coherence (optics), 3D image processing, Video

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Proceedings Article | 20 April 2017 Paper

Towards a clinical implementation of uOCT instrument for in vivo imaging of human airways

Hui Min Leung, Dongyao Cui, Timothy Ford, Daryl Hyun, Jing Dong, Biwei Yin, Susan Birket, George Solomon, Linbo Liu, Steven Rowe, Guillermo Tearney

Proceedings Volume 10056, 1005614 (2017) https://doi.org/10.1117/12.2253423

KEYWORDS: Liquids, Pathogens, Human subjects, Imaging systems, Optical coherence tomography, Coherence (optics), Tomography, In vivo imaging, Cystic fibrosis, Image resolution

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Proceedings Article | 19 April 2017 Presentation

A coaxially focused multi-mode beam for optical coherence tomography imaging with extended depth of focus (Conference Presentation)

Biwei Yin, Chia-Pin Liang, Barry Vuong, Guillermo Tearney

Proceedings Volume 10053, 100531N (2017) https://doi.org/10.1117/12.2254928

KEYWORDS: Coherence imaging, Optical imaging, Optical coherence tomography, Gaussian beams, Laser beam diagnostics, Fiber optics, Image resolution, Wavefronts, Confocal microscopy, Range imaging

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Proceedings Article | 19 April 2017 Presentation

Imaging birefringent crystals using micro optical coherence tomography (Conference Presentation)

Gargi Sharma, Kanwarpal Singh, Joseph Gardecki, Guillermo Tearney

Proceedings Volume 10042, 100420L (2017) https://doi.org/10.1117/12.2253884

KEYWORDS: Crystal optics, Scattering, Crystals, Optical coherence tomography, Polarization, Arteries, Spectroscopy, Image resolution, Light scattering, Laser scattering

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Proceedings Article | 19 April 2017 Presentation

In vivo OCT imaging of the airways (Conference Presentation)

Hui Min Leung, Lael Yonker, Hongmei Mou, Avira Som, Bryan Hurley, Guillermo Tearney

Proceedings Volume 10041, 1004103 (2017) https://doi.org/10.1117/12.2252160

KEYWORDS: In vivo imaging, Biology, Medical research, Biological research, Optical coherence tomography, Tomography, Image resolution, Cystic fibrosis, Coherence (optics), Real time imaging

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Proceedings Article | 19 April 2017 Presentation

Imaging demonstration of a flexible micro-OCT endobronchial probe (Conference Presentation)

Dongyao Cui, Kengyeh Chu, Timothy Ford, Daryl Chulho Hyun, Hui Min Leung, Biwei Yin, Susan Birket, George Solomon, Steven Rowe, Guillermo Tearney

Proceedings Volume 10041, 1004109 (2017) https://doi.org/10.1117/12.2251449

KEYWORDS: Imaging systems, Photomedicine, Optical coherence tomography, Cystic fibrosis, Chronic obstructive pulmonary disease, In vivo imaging, Visualization, Motion models, Performance modeling, Imaging devices

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Proceedings Article | 19 April 2017 Presentation

Feasibility study of Tethered Capsule Endomicroscopy (TCE) deployment in the small intestine (Conference Presentation)

David Otuya, Yogesh Verma, Jing Dong, Michalina Gora, Guillermo Tearney

Proceedings Volume 10040, 100400C (2017) https://doi.org/10.1117/12.2253404

KEYWORDS: Current controlled current source, Endoscopy, Endomicroscopy, Intestine, Esophagus, Microscopy

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Proceedings Article | 19 April 2017 Presentation

Tethered SECM endoscopic capsule for the diagnosis of eosinophilic esophagitis (Conference Presentation)

Dukho Do, DongKyun Kang, Nima Tabatabaei, Catriona Grant, Norman Nishioka, Mireille Rosenberg, Paul Hesterberg, Qian Yuan, John Garber, Aubrey Katz, Wayne Shreffler, Guillermo Tearney

Proceedings Volume 10040, 100400G (2017) https://doi.org/10.1117/12.2253401

KEYWORDS: Endoscopy, Confocal microscopy, Esophagus, Biopsy, Visualization, Speckle, Gold, Image quality standards, Image resolution, Prototyping

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Eosinophilic Esophagitis (EoE) is an inflammatory disease caused by inhaled or ingested food allergies, and characterized by the infiltration of eosinophils in the esophagus. The gold standard for diagnosing EoE is to conduct endoscopy and obtain multiple biopsy specimens from different portions of the esophagus; an exam is considered positive if more than 15 eosinophils per high power field (HPF) in any of the biopsies. This method of diagnosis is problematic because endoscopic biopsy is expensive and poorly tolerated and the esophageal eosinophil burden needs to be monitored frequently during the course of the disease. Spectrally encoded confocal microscopy (SECM) is a high-speed confocal microscopy technology that can visualize individual eosinophils in large microscopic images of the human esophagus, equivalent to more than 30,000 HPF. Previously, we have demonstrated that tethered capsule SECM can be conducted in unsedated subjects with diagnosed EoE. However, speckle noise and the relatively low resolution in images obtained with the first capsule prototypes made it challenging to distinguish eosinophils from other cells. In this work, we present a next-generation tethered SECM capsule, which has been modified to significantly improve image quality. First, we substituted the single mode fiber with a dual-clad fiber to reduce speckle noise. A gradient-index multimode fiber was fusion spliced at the tip of the dual-clad fiber to increase the effective numerical aperture of the fiber from 0.09 to 0.15, expanding the beam more rapidly to increase the illumination aperture at the objective. These modifications enabled the new SECM capsule to achieve a lateral resolution of 1.8 µm and an axial resolution of 16.1 µm, which substantially improves the capacity of this probe to visualize cellular features in human tissue. The total size of the SECM capsule remained 6.75 mm in diameter and 31 mm in length. We are now in the process of testing this new SECM capsule in humans. Early results using this new SECM capsule suggest that this technology has the potential to be an effective tool for the diagnosis of EoE.

Proceedings Article | 19 April 2017 Presentation

Common path endoscopic probes for optical coherence tomography (Conference Presentation)

Kanwarpal Singh, Joseph Gardecki, Guillermo Tearney

Proceedings Volume 10040, 100400U (2017) https://doi.org/10.1117/12.2252771

KEYWORDS: Gold, Optical coherence tomography, Reflectors, Arteries, Skin, Endoscopy, Polarization, Image quality, Signal generators, Fiber coatings

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Proceedings Article | 19 April 2017 Presentation

Extended depth of focus tethered capsule OCT endomicroscopy for upper gastrointestinal tract imaging (Conference Presentation)

Barry Vuong, Biwei Yin, Emilie Beaulieu-Ouellet, Chia Pin Liang, Matthew Beatty, Kanwarpal Singh, Jing Dong, Catriona Grant, Mireille Rosenberg, Guillermo Tearney

Proceedings Volume 10040, 100400N (2017) https://doi.org/10.1117/12.2252103

KEYWORDS: Photomedicine, Optical coherence tomography, Endoscopy, Tissue optics, Endomicroscopy, Esophagus, Image resolution, Tissues, Imaging devices, Optomechanical components

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Endoscopy, the current standard of care for the diagnosis of upper gastrointestinal (GI) diseases, is not ideal as a screening tool because it is costly, necessitates a team of medically trained personnel, and typically requires that the patient be sedated. Endoscopy is also a superficial macroscopic imaging modality and therefore is unable to provide detailed information on subsurface microscopic structure that is required to render a precise tissue diagnosis. We have overcome these limitations through the development of an optical coherence tomography tethered capsule endomicroscopy (OCT-TCE) imaging device. The OCT-TCE device has a pill-like form factor with an optically clear wall to allow the contained opto-mechanical components to scan the OCT beam along the circumference of the esophagus. Once swallowed, the OCT-TCE device traverses the esophagus naturally via peristalsis and multiple cross-sectional OCT images are obtained at 30-40 μm lateral resolution by 7 μm axial resolution. While this spatial resolution enables differentiation of squamous vs columnar mucosa, crucial microstructural features such as goblet cells (~10 μm), which signify intestinal metaplasia in BE, and enlarged nuclei that are indicative of dysplasia cannot be resolved with the current OCT-TCE technology. In this work we demonstrate a novel design of a high lateral resolution OCT-TCE device with an extended depth of focus (EDOF). The EDOF is created by use of self-imaging wavefront division multiplexing that produces multiple focused modes at different depths into the sample. The overall size of the EDOF TCE is similar to that of the previous OCT-TCE device (~ 11 mm by 26 mm) but with a lateral resolution of ~ 8 μm over a depth range of ~ 2 mm. Preliminary esophageal and intestinal imaging using these EDOF optics demonstrates an improvement in the ability to resolve tissue morphology including individual glands and cells. These results suggest that the use of EDOF optics may be a promising avenue for increasing the accuracy of OCT-TCE for the diagnosis of upper GI diseases.

Proceedings Article | 19 April 2017 Presentation

Optimizing the villi visualization by tethered capsule OCT endomicroscopy for comprehensive imaging of human duodenum (Conference Presentation)

Jing Dong, Michalina Gora, Emilie Beaulieu-Ouellet, Lucille Queneherve, Catriona Grant, Mireille Rosenberg, Norman Nishioka, Alessio Fasano, Guillermo Tearney

Proceedings Volume 10040, 100400D (2017) https://doi.org/10.1117/12.2255772

KEYWORDS: Photomedicine, Endoscopy, Biopsy, Visualization, Optical coherence tomography, Endomicroscopy, Tissues, Inflammation, Diagnostics, 3D image processing

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SPIE Journal Paper | 30 September 2016 Open Access

Tethered capsule endomicroscopy: from bench to bedside at a primary care practice

Michalina Gora, Leigh Simmons, Lucille Quénéhervé, Catriona Grant, Robert Carruth, Weina Lu, Aubrey Tiernan, Jing Dong, Beth Walker Corkery, Amna Soomro, Mireille Rosenberg, Joshua Metlay, Guillermo Tearney

JBO, Vol. 21, Issue 10, 104001, (September 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.10.104001

KEYWORDS: Esophagus, Endomicroscopy, Endoscopy, Optical coherence tomography, Tissues, Stomach, Visualization, Biopsy, Manufacturing, Lutetium

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Proceedings Article | 3 May 2016 Presentation

Clinical experience using the tethered capsule-based spectrally encoded confocal microendoscopy for diagnosis of eosinophilic esophagitis (Conference Presentation)

Dukho Do, Sanaz Alali, DongKyun Kang, Nima Tabatabaie, Weina Lu, Catriona Grant, Amna Soomro, Norman Nishioka, Mireille Rosenberg, Paul Hesterberg, Qian Yuan, John Garber, Aubrey Katz, Wayne Shreffler, Guillermo Tearney

Proceedings Volume 9691, 96910L (2016) https://doi.org/10.1117/12.2218559

KEYWORDS: Confocal microscopy, Photomedicine, Esophagus, Biopsy, Endoscopy, Scattering, Gold, Standards development, Reflectivity, Lutetium

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Proceedings Article | 27 April 2016 Presentation

Imaging neutrophil migration dynamics using micro-optical coherence tomography (Conference Presentation)

Kengyeh Chu, Lael Yonker, Avira Som, Michael Pazos, Mark Kusek, Bryan Hurley, Guillermo Tearney

Proceedings Volume 9709, 97090G (2016) https://doi.org/10.1117/12.2213940

KEYWORDS: Tomography, Coherence (optics), Signal detection, Visualization, 3D image processing, Receptors, Resistance, Biomedical optics, Current controlled current source

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Neutrophils are immune cells that undergo chemotaxis, detecting and migrating towards a chemical signal gradient. Neutrophils actively migrate across epithelial boundaries, interacting with the epithelium to selectively permit passage without compromising the epithelial barrier. In many inflammatory disorders, excessive neutrophil migration can cause damage to the epithelium itself. The signaling pathways and mechanisms that facilitate trans-epithelial migration are not fully characterized. Our laboratory has developed micro-optical coherence tomography (μOCT), which has 2 μm lateral resolution and 1 μm axial resolution. As a high-resolution native contrast modality, μOCT can directly visualize individual neutrophils as they interact with a cell layer cultured on a transwell filter. A chemoattractant can be applied to the apical side of inverted monolayer, and human neutrophils placed in the basolateral compartment, while μOCT captures 3D images of the chemotaxis. μOCT images can also generate quantitative metrics of migration volume to study the dependence of chemotaxis on monolayer cell type, chemoattractant type, and disease state of the neutrophils. For example, a disease known as leukocyte adhesion deficiency (LAD) can be simulated by treating neutrophils with antibodies that interfere with the CD18 receptor, a facilitator of trans-epithelial migration. We conducted a migration study of anti-CD18 treated and control neutrophils using T84 intestinal epithelium as a barrier. After one hour, μOCT time-lapse imaging indicated a strong difference in the fraction of neutrophils that remain attached to the epithelium after migration (0.67 ± 0.12 attached anti-CD18 neutrophils, 0.23 ± 0.08 attached control neutrophils, n = 6, p < 0.05), as well as a modest but non-significant decrease in total migration volume for treated neutrophils. We can now integrate μOCT-derived migration metrics with simultaneously acquired measurements of transepithelial electrical resistance (TEER), a measure of membrane integrity that decreases when neutrophils create openings in the epithelium to permit migration. Preliminary results (n = 2) using real-time TEER measurements indicate that TEER change in anti-CD18 migration (26% at 1 hour) is not lower compared to control (14% at 1 hour), suggesting that the neutrophil-epithelial interaction is not impaired. Combined µOCT+TEER will allow the relationship of neutrophil migration and epithelial interactions to be studied to help uncover the mechanisms of altered neutrophil behavior in patients with inflammatory and immune diseases.

Proceedings Article | 27 April 2016 Presentation

Simple, monolithic optical element for forward-viewing spectrally encoded endoscopy (Conference Presentation)

Dukho Do, Dongkyun Kang, Mitsuhiro Ikuta, Guillermo Tearney

Proceedings Volume 9691, 96910O (2016) https://doi.org/10.1117/12.2213394

KEYWORDS: Optical components, Endoscopy, Optical design, Mirrors, Photomedicine, Image processing software, Diffraction gratings, Image resolution, Endoscopes, Medical imaging applications

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Proceedings Article | 27 April 2016 Presentation

SECM half-inch tethered endoscopic capsule (HITEC) for esophageal imaging (Conference Presentation)

DongKyun Kang, Minkyu Kim, Robert Carruth, Weina Lu, Tao Wu, Sanaz Alali, Dukho Do, Amna Soomro, Catriona Grant, Aubrey Tiernan, Mireille Rosenberg, Norman Nishioka, Guillermo Tearney

Proceedings Volume 9691, 96910M (2016) https://doi.org/10.1117/12.2208942

KEYWORDS: Endoscopy, Tissue optics, Esophagus, Confocal microscopy, Tissues, In vivo imaging, Speckle, Lens design, Optics manufacturing, Endomicroscopy

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Proceedings Article | 27 April 2016 Presentation

Tethered capsule OCT endomicroscopy for upper gastrointestinal tract imaging by using ball lens probe (Conference Presentation)

Jing Dong, Michalina Gora, Rohith Reddy, Wolfgang Trasischker, Oriane Poupart, Weina Lu, Robert Carruth, Catriona Grant, Amna Soomro, Aubrey Tiernan, Mireille Rosenberg, Norman Nishioka, Guillermo Tearney

Proceedings Volume 9691, 96910R (2016) https://doi.org/10.1117/12.2213931

KEYWORDS: Optics manufacturing, Photomedicine, Optical coherence tomography, Endoscopy, Endomicroscopy, Glasses, GRIN lenses, Optical fibers, Surgery, Visualization

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Proceedings Article | 27 April 2016 Presentation

Flexible micro-OCT endobronchial probe for imaging of mucociliary transport (Conference Presentation)

Dongyao Cui, Kengyeh Chu, Carolin Unglert, Tim Ford, Robert Carruth, Daryl Hyun, Kanwarpal Singh, Susan Birket, George Solomon, Steve Rowe, Guillermo Tearney

Proceedings Volume 9691, 969107 (2016) https://doi.org/10.1117/12.2213057

KEYWORDS: Visualization, Cystic fibrosis, Chronic obstructive pulmonary disease, Pathogens, In vivo imaging, Photomedicine, Imaging systems, Particles, Lung, Liquids

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Mucociliary clearance (MCC) plays a significant role in maintaining the health of human respiratory system by eliminating foreign particles trapped within mucus. Failure of this mechanism in diseases such as cystic fibrosis and chronic obstructive pulmonary disease (COPD) leads to airway blockage and lung infection, causing morbidity and mortality. The volume of airway mucus and the periciliary liquid encapsulating the cilia, in addition to ciliary beat frequency and velocity of mucociliary transport, are vital parameters of airway health. However, the diagnosis of disease pathogenesis and advances of novel therapeutics are hindered by the lack of tools for visualization of ciliary function in vivo. Our laboratory has previously developed a 1-µm resolution optical coherence tomography method, termed Micro-OCT, which is capable of visualizing mucociliary transport and quantitatively capturing epithelial functional metrics. We have also miniaturized Micro-OCT optics in a first-generation rigid 4mm Micro-OCT endoscope utilizing a common-path design and an apodizing prism configuration to produce an annular profile sample beam, and reported the first in vivo visualization of mucociliary transport in swine. We now demonstrate a flexible 2.5 mm Micro-OCT probe that can be inserted through the instrument channel of standard flexible bronchoscopes, allowing bronchoscopic navigation to smaller airways and greatly improving clinical utility. Longitudinal scanning over a field of view of more than 400 µm at a frame rate of 40 Hz was accomplished with a driveshaft transduced by a piezo-electric stack motor. We present characterization and imaging results from the flexible micro-OCT probe and progress towards clinical translation. The ability of the bronchoscope-compatible micro-OCT probe to image mucus clearance and epithelial function will enable studies of cystic fibrosis pathogenesis in small airways, provide diagnosis of mucociliary clearance disorders, and allow individual responses to treatments to be monitored.

Proceedings Article | 27 April 2016 Presentation

Tethered capsule OCT endomicroscopy: from bench to bedside at the primary care office (Conference Presentation)

Michalina Gora, Leigh Simmons, Aubrey Tiernan, Catriona Grant, Amna Soomro, Elizabeth Walker Corkery, Mireille Rosenberg, Joshua Metlay, Guillermo Tearney

Proceedings Volume 9691, 969106 (2016) https://doi.org/10.1117/12.2211393

KEYWORDS: Optical coherence tomography, Esophagus, Endomicroscopy, Photomedicine, Imaging systems, Image resolution, Image quality, Endoscopy, Optical microscopy, Microscopy

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Proceedings Article | 27 April 2016 Presentation

In-vivo continuous monitoring of mixed venous oxygen saturation by photoacoustic transesophageal echocardiography (Conference Presentation)

Li Li, Balachundhar Subramaniam, Aaron Aguirre, Michael Andrawes, Guillermo Tearney

Proceedings Volume 9689, 96892U (2016) https://doi.org/10.1117/12.2211112

KEYWORDS: Oxygen, Photoacoustic spectroscopy, Echocardiography, In vivo imaging, Arteries, Acoustics, Lithium, Picture Archiving and Communication System, Oximetry

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Proceedings Article | 27 April 2016 Presentation

Common path ball lens probe for optical coherence tomography (Conference Presentation)

Kanwarpal Singh, Daisuke Yamada, Guillermo Tearney

Proceedings Volume 9689, 96893C (2016) https://doi.org/10.1117/12.2214236

KEYWORDS: Optical coherence tomography, Lens design, Arteries, Spectrometer engineering, Spectroscopy, Interfaces, Skin, Visualization, Fusion splicing, Diagnostics

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Proceedings Article | 27 April 2016 Presentation

Compensation of spectral artifacts in dual-modality intravascular optical coherence tomography and near-infrared spectroscopy (Conference Presentation)

Ali Fard, Joseph Gardecki, Giovanni Ughi, Chulho Hyun, Guillermo Tearney

Proceedings Volume 9689, 96892Z (2016) https://doi.org/10.1117/12.2219948

KEYWORDS: Near infrared spectroscopy, Optical coherence tomography, Light sources, Arteries, 3D image processing, In vivo imaging, Imaging technologies, Reliability, Data acquisition, Spectral calibration

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Intravascular optical coherence tomography (OCT) is a high-resolution catheter-based imaging method that provides three-dimensional microscopic images of coronary artery in vivo, facilitating coronary artery disease treatment decisions based on detailed morphology. Near-infrared spectroscopy (NIRS) has proven to be a powerful tool for identification of lipid-rich plaques inside the coronary walls. We have recently demonstrated a dual-modality intravascular imaging technology that integrates OCT and NIRS into one imaging catheter using a two-fiber arrangement and a custom-made dual-channel fiber rotary junction. It therefore enables simultaneous acquisition of microstructural and composition information at 100 frames/second for improved diagnosis of coronary lesions. The dual-modality OCT-NIRS system employs a single wavelength-swept light source for both OCT and NIRS modalities. It subsequently uses a high-speed photoreceiver to detect the NIRS spectrum in the time domain. Although use of one light source greatly simplifies the system configuration, such light source exhibits pulse-to-pulse wavelength and intensity variation due to mechanical scanning of the wavelength. This can be in particular problematic for NIRS modality and sacrifices the reliability of the acquired spectra. In order to address this challenge, here we developed a robust data acquisition and processing method that compensates for the spectral variations of the wavelength-swept light source. The proposed method extracts the properties of the light source, i.e., variation period and amplitude from a reference spectrum and subsequently calibrates the NIRS datasets. We have applied this method on datasets obtained from cadaver human coronary arteries using a polygon-scanning (1230-1350nm) OCT system, operating at 100,000 sweeps per second. The results suggest that our algorithm accurately and robustly compensates the spectral variations and visualizes the dual-modality OCT-NIRS images. These findings are therefore crucial for the practical application and clinical translation of dual-modality intravascular OCT-NIRS imaging when the same swept sources are used for both OCT and spectroscopy.

Proceedings Article | 26 April 2016 Presentation

Spectrally encoded confocal microscopy (SECM) for rapid assessment of breast excision specimens (Conference Presentation)

Elena Brachtel, Nicole Johnson, Amelia Huck, Travis Rice-Stitt, Mark Vangel, Barbara Smith, Guillermo Tearney, DongKyun Kang

Proceedings Volume 9703, 97030C (2016) https://doi.org/10.1117/12.2209699

KEYWORDS: Breast, Confocal microscopy, Surgery, Tissues, Diagnostics, Breast cancer, Image visualization, Tumors, Reflectivity, Natural surfaces

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SPIE Journal Paper | 6 November 2014 Open Access

Low coherence interferometry approach for aiding fine needle aspiration biopsies

Ernest Chang, Joseph Gardecki, Martha Pitman, Eric Wilsterman, Ankit Patel, Guillermo Tearney, Nicusor Iftimia

JBO, Vol. 19, Issue 11, 116005, (November 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.11.116005

KEYWORDS: Tissues, Tumors, Biopsy, Tissue optics, Interferometry, Fine needle aspiration, Cell biology, Breast, Diagnostics, Optical coherence tomography

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SPIE Journal Paper | 12 December 2012 Open Access

Validation of two-dimensional and three-dimensional measurements of subpleural alveolar size parameters by optical coherence tomography

Carolin Unglert, William Warger, Jeroen Hostens, Eman Namati, Reginald Birngruber, Brett Bouma, Guillermo Tearney

JBO, Vol. 17, Issue 12, 126015, (December 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.12.126015

KEYWORDS: Optical coherence tomography, Tissues, Image segmentation, Refractive index, Lung, Refraction, 3D modeling, In vivo imaging, Error analysis, 3D metrology

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SPIE Journal Paper | 21 September 2012 Open Access

Errata: Frequency domain multiplexing for speckle reduction in optical coherence tomography

Gijs van Soest, Evelyn Regar, Martin Villiger, Guillermo Tearney, Brett Bouma, Antonius van der Steena

JBO, Vol. 17, Issue 9, 099801, (September 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.9.099801

KEYWORDS: Multiplexing, Speckle, Optical coherence tomography, Licensing, Medical research, Patents, Biomedical optics, Photomedicine, Cardiology

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SPIE Journal Paper | 13 July 2012 Open Access

Frequency domain multiplexing for speckle reduction in optical coherence tomography

Gijs van Soest, Evelyn Regar, Antonius van der Steen, Martin Villiger, Guillermo Tearney, Brett Bouma

JBO, Vol. 17, Issue 7, 076018, (July 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.7.076018

KEYWORDS: Speckle, Optical coherence tomography, Signal attenuation, Fused deposition modeling, Image resolution, Multiplexing, Image filtering, Tissues, Data acquisition, Quantitative analysis

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SPIE Journal Paper | 11 June 2012 Open Access

Evaluation of optical reflectance techniques for imaging of alveolar structure

Carolin Unglert, Eman Namati, William Warger, Linbo Liu, Hongki Yoo, DongKyun Kang, Brett Bouma, Guillermo Tearney

JBO, Vol. 17, Issue 7, 071303, (June 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.7.071303

KEYWORDS: Lung, Tissues, Reflectivity, Imaging systems, Tissue optics, Image resolution, Visualization, In vivo imaging, Biomedical optics, Confocal microscopy

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Proceedings Article | 18 February 2012 Paper

Feasibility and methodology of optical coherence tomography imaging of human intracranial aneurysms: ex vivo pilot study

Barry Vuong, Cuiru Sun, Tim-Rasmus Khiel, Joseph Gardecki, Beau Standish, Leodante da Costa, Josaphat de Morais, Guillermo Tearney, Victor X. Yang

Proceedings Volume 8207, 82074M (2012) https://doi.org/10.1117/12.908998

KEYWORDS: Optical coherence tomography, Tissues, Coherence imaging, Tissue optics, Optical imaging, Calcium, Arteries, Pathology, Visualization, Imaging systems

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Proceedings Article | 9 February 2012 Paper

Wavelength multiplexing for FD-OCT speckle averaging

Gijs van Soest, Evelyn Regar, Brett Bouma, Guillermo Tearney, Antonius F. van der Steen

Proceedings Volume 8207, 820742 (2012) https://doi.org/10.1117/12.906335

KEYWORDS: Speckle, Optical coherence tomography, Signal attenuation, Multiplexing, Tissue optics, Image resolution, Image processing, Quantitative analysis, In vivo imaging, Image filtering

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SPIE Journal Paper | 1 November 2011 Open Access

Injury depth control from combined wavelength and power tuning in scanned beam laser thermal therapy

Martin Villiger, Andrew Soroka, Guillermo Tearney, Brett Bouma, Benjamin Vakoc

JBO, Vol. 16, Issue 11, 118001, (November 2011) https://doi.org/10.1117/12.10.1117/1.3647581

KEYWORDS: Injuries, Tissues, Laser therapeutics, Absorption, Laser tissue interaction, Tissue optics, Natural surfaces, Esophagus, Wavelength tuning, 3D modeling

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SPIE Journal Paper | 1 February 2011 Open Access

Intravascular laser speckle imaging catheter for the mechanical evaluation of the arterial wall

Zeinab Hajjarian, Jingqun Xi, Guillermo Tearney, Seemantini Nadkarni, Farouc Jaffer

JBO, Vol. 16, Issue 02, 026005, (February 2011) https://doi.org/10.1117/12.10.1117/1.3533322

KEYWORDS: In vivo imaging, Speckle, Laser speckle imaging, Arteries, Speckle pattern, Prototyping, Blood, Electrocardiography, Motion measurement, Time metrology

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SPIE Journal Paper | 1 September 2010 Open Access

Heart wall velocimetry and exogenous contrast-based cardiac flow imaging in Drosophila melanogaster using Doppler optical coherence tomography

Michael Choma, Melissa Suter, Benjamin Vakoc, Brett Bouma, Gary Tearney

JBO, Vol. 15, Issue 05, 056020, (September 2010) https://doi.org/10.1117/12.10.1117/1.3503418

KEYWORDS: Heart, Doppler effect, Optical coherence tomography, Doppler tomography, Velocimetry, Particles, Video, Biology, Scattering, Imaging systems

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SPIE Journal Paper | 1 January 2010 Open Access

Challenges on the frontier of intracoronary imaging: atherosclerotic plaque macrophage measurement by optical coherence tomography

Atsushi Tanaka, Guillermo Tearney, Brett Bouma

JBO, Vol. 15, Issue 01, 011104, (January 2010) https://doi.org/10.1117/12.10.1117/1.3290810

KEYWORDS: Optical coherence tomography, Intravascular ultrasound, Arteries, Backscatter, Signal attenuation, In vivo imaging, Inflammation, Optical testing, Tissues, Photomedicine

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SPIE Journal Paper | 1 January 2010 Open Access

Atherosclerotic tissue characterization in vivo by optical coherence tomography attenuation imaging

Gijs van Soest, Thadé Goderie, Evelyn Regar, Senada Koljenovic, Arno Geert van Leenders, Nieves Gonzalo, Sander van Noorden, Takayuki Okamura, Brett Bouma, Guillermo Tearney, Wolter Oosterhuis, Patrick Serruys, Antonius van der Steen

JBO, Vol. 15, Issue 01, 011105, (January 2010) https://doi.org/10.1117/12.10.1117/1.3280271

KEYWORDS: Optical coherence tomography, Signal attenuation, Tissue optics, Tissues, In vivo imaging, Coherence imaging, Arteries, Pathology, Heart, In vitro testing

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Proceedings Article | 3 March 2009 Paper

Combined spectrally encoded confocal microscopy and optical frequency domain imaging system

DongKyun Kang, Melissa Suter, Caroline Boudoux, Patrick Yachimski, Brett Bouma, Norman Nishioka, Guillermo Tearney

Proceedings Volume 7172, 717206 (2009) https://doi.org/10.1117/12.808028

KEYWORDS: Imaging systems, Tissues, Biopsy, Confocal microscopy, Intestine, Image resolution, Objectives, Tissue optics, Esophagus, Mirrors

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SPIE Journal Paper | 1 September 2008 Open Access

Laser speckle imaging of atherosclerotic plaques through optical fiber bundles

Seemantini Nadkarni, Brett Bouma, Dvir Yelin, Amneet Gulati, Guillermo Tearney

JBO, Vol. 13, Issue 05, 054016, (September 2008) https://doi.org/10.1117/12.10.1117/1.2982529

KEYWORDS: Speckle, Speckle pattern, Optical fibers, Time metrology, Motion measurement, Fiber lasers, Laser speckle imaging, Diagnostics, Image transmission, In vivo imaging

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SPIE Journal Paper | 1 July 2008 Open Access

Fingerprint and high-wavenumber Raman spectroscopy in a human-swine coronary xenograft in vivo

Alexandra Chau, Jason Motz, Joseph Gardecki, Sergio Waxman, Brett Bouma, Guillermo Tearney

JBO, Vol. 13, Issue 04, 040501, (July 2008) https://doi.org/10.1117/12.10.1117/1.2960015

KEYWORDS: Raman spectroscopy, Arteries, In vivo imaging, Optical filters, Motion models, Heart, Laser tissue interaction, Mirrors, Blood, Optical fibers

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Proceedings Article | 22 February 2008 Paper

Differential near-field scanning optical microscopy based on sensor arrays

Aydogan Ozcan, Ertugrul Cubukcu, Federico Capasso, Alberto Bilenca, Brett Bouma, Guillermo Tearney

Proceedings Volume 6865, 686508 (2008) https://doi.org/10.1117/12.762120

KEYWORDS: Near field scanning optical microscopy, Signal to noise ratio, Spatial resolution, Near field, Sensors, Imaging systems, Skin, Image resolution, Scanning electron microscopy, Optical microscopy

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SPIE Journal Paper | 1 January 2008 Open Access

Automated algorithm for differentiation of human breast tissue using low coherence interferometry for fine needle aspiration biopsy guidance

Brian Goldberg, Nicusor Iftimia, Jason Bressner, Martha Pitman, Elkan Halpern, Brett Bouma, Guillermo Tearney

JBO, Vol. 13, Issue 01, 014014, (January 2008) https://doi.org/10.1117/12.10.1117/1.2837433

KEYWORDS: Tissues, Breast, Tissue optics, Spatial frequencies, Fine needle aspiration, Biopsy, Scattering, Statistical modeling, Interferometry, Algorithm development

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SPIE Journal Paper | 1 November 2007 Open Access

Multimodality optical imaging of embryonic heart microstructure

Ronit Yelin, Dvir Yelin, William Oh, Seok-Hyun Yun, Caroline Boudoux, Benjamin Vakoc, Brett Bouma, Guillermo Tearney

JBO, Vol. 12, Issue 06, 064021, (November 2007) https://doi.org/10.1117/12.10.1117/1.2822904

KEYWORDS: Heart, Bioalcohols, In vivo imaging, Optical imaging, Image resolution, Confocal microscopy, Video, 3D image processing, Visualization, Optical coherence tomography

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SPIE Journal Paper | 1 March 2007 Open Access

Real-time microscopic visualization of tissue response to laser thermal therapy

Benjamin Vakoc, Guillermo Tearney, Brett Bouma

JBO, Vol. 12, Issue 02, 020501, (March 2007) https://doi.org/10.1117/12.10.1117/1.2714027

KEYWORDS: Laser therapeutics, Tissues, Laser tissue interaction, Visualization, Tissue optics, Injuries, Reflectivity, Phase measurement, Image processing, Optical coherence tomography

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SPIE Journal Paper | 1 March 2006 Open Access

Optical coherence tomography for imaging the vulnerable plaque

Guillermo Tearney, Ik-Kyung Jang, Brett Bouma

JBO, Vol. 11, Issue 02, 021002, (March 2006) https://doi.org/10.1117/12.10.1117/1.2192697

KEYWORDS: Optical coherence tomography, Intravascular ultrasound, Arteries, Coherence imaging, Blood, Cardiology, Computer aided diagnosis and therapy, Tissue optics, Imaging systems, Tissues

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SPIE Journal Paper | 1 March 2006 Open Access

Measurement of fibrous cap thickness in atherosclerotic plaques by spatiotemporal analysis of laser speckle images

Seemantini Nadkarni, Alberto Bilenca, Brett Bouma, Guillermo Tearney

JBO, Vol. 11, Issue 02, 021006, (March 2006) https://doi.org/10.1117/12.10.1117/1.2186046

KEYWORDS: Speckle, Optical properties, Monte Carlo methods, Tissue optics, Speckle pattern, Diffusion, Photon transport, Collagen, Data modeling, Distance measurement

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SPIE Journal Paper | 1 March 2006 Open Access

Special Section Guest Editorial: Cardiovascular Photonics

Laura Marcu, Guillermo Tearney, Kenton Gregory

JBO, Vol. 11, Issue 02, 021001, (March 2006) https://doi.org/10.1117/12.10.1117/1.2191508

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Proceedings Article | 20 February 2006 Paper

Endoscopic polarization-sensitive optical coherence tomography

Mark Pierce, Milen Shishkov, B. Hyle Park, Nader Nassif, Brett Bouma, Guillermo Tearney, Johannes de Boer

Proceedings Volume 6079, 607928 (2006) https://doi.org/10.1117/12.649107

KEYWORDS: Polarization, Optical coherence tomography, Endoscopy, Birefringence, Fiber optics, Poincaré sphere, Natural surfaces, Tissue optics, Tissues, In vivo imaging

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Proceedings Article | 25 April 2005 Paper

Endoscopic imaging of the human vocal cords using polarization-sensitive optical coherence tomography

Mark Pierce, Adam Klein, James Burns, Milen Shishkov, B. Park, Guillermo Tearney, Brett Bouma, Steven Zeitels, Johannes de Boer

Proceedings Volume 5686, (2005) https://doi.org/10.1117/12.589870

KEYWORDS: Optical coherence tomography, Endoscopy, Tissues, In vivo imaging, Birefringence, Polarization, Fiber optics, Human subjects, Collagen, Surgery

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Proceedings Article | 13 April 2005 Paper

Fluid flow analysis in microfluidic devices by spectral-domain optical Doppler tomography

Mark Pierce, Chulmin Joo, Barry Cense, Eli Weinberg, B. Hyle Park, Mircea Mujat, Jeffrey Borenstein, Guillermo Tearney, Brett Bouma, Johannes de Boer

Proceedings Volume 5690, (2005) https://doi.org/10.1117/12.592864

KEYWORDS: Microfluidics, Doppler tomography, Optical coherence tomography, Fluid dynamics, Capillaries, Velocity measurements, Microfluidic imaging, Phase measurement, Imaging devices, Imaging systems

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Proceedings Article | 13 April 2005 Paper

Spectral-domain polarization-sensitive optical coherence tomography at 850 nm

Barry Cense, Teresa Chen, Mircea Mujat, Chulmin Joo, Taner Akkin, B. Park, Mark Pierce, Andy Yun, Brett Bouma, Guillermo Tearney, Johannes de Boer

Proceedings Volume 5690, (2005) https://doi.org/10.1117/12.592840

KEYWORDS: Optical coherence tomography, Polarization, Retina, Nerve, Phase measurement, Eye, Birefringence, Line scan cameras, Beam splitters, Lamps

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Proceedings Article | 1 April 2005 Paper

Fluid flow analysis in microfluidic devices by spectral-domain optical Doppler tomography

Mark Pierce, Chulmin Joo, Barry Cense, Eli Weinberg, Boris Hyle Park, Mircea Mujat, Jeffrey Borenstein, Guillermo Tearney, Brett Bouma, Johannes de Boer

Proceedings Volume 5692, (2005) https://doi.org/10.1117/12.589862

KEYWORDS: Microfluidics, Doppler tomography, Optical coherence tomography, Microfluidic imaging, Capillaries, Fluid dynamics, Velocity measurements, Velocimetry, Imaging devices, Particles

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Proceedings Article | 1 July 2004 Paper

Ultrahigh-speed spectral domain optical coherence tomography of the human retina

Nader Nassif, Barry Cense, B. Park, Mark Pierce, Brett Bouma, Guillermo Tearney, Johannes de Boer

Proceedings Volume 5316, (2004) https://doi.org/10.1117/12.531393

KEYWORDS: Optical coherence tomography, Retina, Optic nerve, In vivo imaging, Head, Retinal scanning, Signal to noise ratio, Eye, Imaging systems, Nerve

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Proceedings Article | 1 July 2004 Paper

Polarization-sensitive optical coherence tomography with a scanning fiber optic probe

Mark Pierce, Milen Shishkov, B. Park, Nader Nassif, Barry Cense, Brett Bouma, Guillermo Tearney, Johannes de Boer

Proceedings Volume 5316, (2004) https://doi.org/10.1117/12.531397

KEYWORDS: Optical coherence tomography, Polarization, Fiber optics, Birefringence, Tissues, Natural surfaces, Endoscopy, Cartilage, Optical fibers, Poincaré sphere

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Proceedings Article | 9 June 2004 Paper

Biomedical imaging using optical technologies

S. Yun, Guillermo Tearney, Brett Bouma

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566509

KEYWORDS: Optical coherence tomography, Biomedical optics, Tissue optics, Confocal microscopy, Optical imaging, Spatial resolution, Light scattering, Tissues, Fiber optics, Absorption

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Proceedings Article | 9 October 2003 Paper

GRISM-based probe for spectrally encoded confocal microscopy

Costas Pitris, Brett Bouma, Milen Shishkov, Caroline Boudoux, Guillermo Tearney

Proceedings Volume 5139, (2003) https://doi.org/10.1117/12.499426

KEYWORDS: Confocal microscopy, Diffraction gratings, Tissue optics, Image resolution, Prisms, Diffraction, Objectives, Imaging systems, Microscopes, Optical design

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SPIE Journal Paper | 1 April 2003 Open Access

Speckle reduction in optical coherence tomography by "path length encoded" angular compounding

Nicusor Iftimia, Brett Bouma, Guillermo Tearney

JBO, Vol. 8, Issue 02, (April 2003) https://doi.org/10.1117/12.10.1117/1.1559060

KEYWORDS: Optical coherence tomography, Speckle, Signal to noise ratio, Glasses, Tissues, Optical components, Tissue optics, Computer programming, Objectives, Endoscopes

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SPIE Journal Paper | 1 January 1998 Open Access

Optical coherence tomographic imaging of human tissue at 1.55 um and 1.8 um using Er- and Tm-doped fiber sources

Brett Bouma, Lynn Nelson, Guillermo Tearney, David Jones, Mark Brezinski, James Fujimoto

JBO, Vol. 3, Issue 01, (January 1998) https://doi.org/10.1117/12.10.1117/1.429898

KEYWORDS: Optical coherence tomography, Tissue optics, Fiber lasers, Imaging systems, Coherence imaging, Absorption, Image resolution, Fiber optics, Mode locking, Scattering

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Proceedings Article | 18 August 1997 Paper

Endoscopic optical coherence tomography

Guillermo Tearney, Brett Bouma, Mark Brezinski, Stephen Boppart, Constantinos Pitris, James Southern, Eric Swanson, James Fujimoto

Proceedings Volume 2979, (1997) https://doi.org/10.1117/12.280212

KEYWORDS: Optical coherence tomography, Endoscopy, Imaging systems, Image resolution, In vivo imaging, Tissues, Coherence (optics), Image acquisition, Tissue optics, Optical imaging

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Proceedings Article | 22 May 1997 Paper

Mode-locked solid state laser sources for optical coherence tomography

Brett Bouma, Guillermo Tearney, Stephen Boppart, Boris Golubovic, Igor Bilinsky, Mark Brezinski, James Fujimoto

Proceedings Volume 2981, (1997) https://doi.org/10.1117/12.274320

KEYWORDS: Optical coherence tomography, Tissue optics, Image resolution, Mode locking, Coherence (optics), Tissues, Modulation, Solid state lasers, Tomography, Laser sources

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Proceedings Article | 30 May 1995 Paper

Optical coherence tomography in multiply scattering tissue

Guillermo Tearney, Mark Brezinski, Michael Hee, Brett Bouma, Joseph Izatt, Eric Swanson, James Southern, R. Rox Anderson, James Fujimoto

Proceedings Volume 2389, (1995) https://doi.org/10.1117/12.209993

KEYWORDS: Optical coherence tomography, Confocal microscopy, Tissue optics, Skin, Tissues, Signal detection, Scattering, Image enhancement, In vitro testing, Microscopes

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Showing 5 of 120 publications

Proceedings Volume Editor (32)

SPIE Conference Volume | 22 March 2024

Endoscopic Microscopy XIX

SPIE Conference Volume | 21 April 2023

Endoscopic Microscopy XVIII

SPIE Conference Volume | 28 March 2022

Endoscopic Microscopy XVII

SPIE Conference Volume | 22 April 2021

Endoscopic Microscopy XVI

SPIE Conference Volume | 11 March 2020

Endoscopic Microscopy XV

Showing 5 of 32 publications

Conference Committee Involvement (61)

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIX

25 January 2025 | San Francisco, California, United States

Light in Cardiology 2025

25 January 2025 | San Francisco, California, United States

Endoscopic Microscopy XX

25 January 2025 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII

29 January 2024 | San Francisco, California, United States

Endoscopic Microscopy XIX

27 January 2024 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology 2024

27 January 2024 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII

30 January 2023 | San Francisco, California, United States

Endoscopic Microscopy XVIII

28 January 2023 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology 2023

28 January 2023 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVI

24 January 2022 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology 2022

22 January 2022 | San Francisco, California, United States

Endoscopic Microscopy XVII

22 January 2022 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV

6 March 2021 | Online Only, California, United States

Endoscopic Microscopy XVI

6 March 2021 | Online Only, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology 2021

6 March 2021 | Online Only, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIV

3 February 2020 | San Francisco, California, United States

Endoscopic Microscopy XV

1 February 2020 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology 2020

1 February 2020 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIII

4 February 2019 | San Francisco, California, United States

Endoscopic Microscopy XIV

2 February 2019 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology 2019

2 February 2019 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXII

29 January 2018 | San Francisco, California, United States

Endoscopic Microscopy XIII

27 January 2018 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology 2018

27 January 2018 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXI

30 January 2017 | San Francisco, California, United States

Endoscopic Microscopy XII

29 January 2017 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

28 January 2017 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XX

15 February 2016 | San Francisco, California, United States

Endoscopic Microscopy XI

14 February 2016 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

13 February 2016 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIX

9 February 2015 | San Francisco, California, United States

Endoscopic Microscopy X

8 February 2015 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

7 February 2015 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVIII

3 February 2014 | San Francisco, California, United States

Endoscopic Microscopy IX

2 February 2014 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

1 February 2014 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII

4 February 2013 | San Francisco, California, United States

Endoscopic Microscopy VIII

3 February 2013 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

2 February 2013 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI

23 January 2012 | San Francisco, California, United States

Endoscopic Microscopy VII

22 January 2012 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

21 January 2012 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIV

24 January 2011 | San Francisco, California, United States

Endoscopic Microscopy VI

23 January 2011 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

22 January 2011 | San Francisco, California, United States

Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XIV

25 January 2010 | San Francisco, California, United States

Endoscopic Microscopy V

25 January 2010 | San Francisco, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

23 January 2010 | San Francisco, California, United States

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIII

26 January 2009 | San Jose, California, United States

Endoscopic Microscopy IV

25 January 2009 | San Jose, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

24 January 2009 | San Jose, California, United States

Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII

21 January 2008 | San Jose, California, United States

Endoscopic Microscopy III

20 January 2008 | San Jose, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

19 January 2008 | San Jose, California, United States

Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XI

22 January 2007 | San Jose, California, United States

Endoscopic Microscopy II

21 January 2007 | San Jose, California, United States

Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine X

23 January 2006 | San Jose, California, United States

Endoscopic Microscopy

22 January 2006 | San Jose, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

21 January 2006 | San Jose, California, United States

Diagnostic and Therapeutic Applications of Light in Cardiology

20 January 2006 | San Jose, California, United States

Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine IX

23 January 2005 | San Jose, CA, United States

Showing 5 of 61 Conference Committees

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