Dr. John A. Crowe Profile

Dr. John A. Crowe

Professor of Biomedical Engineering at Univ of Nottingham

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Author

Publications (23)

SPIE Journal Paper | 10 March 2014 Open Access

Light path-length distributions within the retina

Paul Rodmell, John Crowe, Alistair Gorman, Andrew Harvey, Gonzalo Muyo, David Mordant, Andrew McNaught, Stephen Morgan

JBO, Vol. 19, Issue 03, 036008, (March 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.3.036008

KEYWORDS: Sensors, Monte Carlo methods, Photons, Retina, Oxygen, Eye, Scattering, Absorption, Light scattering, Imaging systems

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SPIE Journal Paper | 6 March 2012 Open Access

Application of a maximum likelihood algorithm to ultrasound modulated optical tomography

Nam Trung Huynh, Diwei He, Barrie Hayes-Gill, John Crowe, John Walker, Melissa Mather, Felicity Rose, Stephen Morgan, Nicholas Parker, Malcolm Povey

JBO, Vol. 17, Issue 02, 026014, (March 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.2.026014

KEYWORDS: Signal detection, Modulation, Acoustics, Scattering, Signal to noise ratio, Reconstruction algorithms, Data modeling, Tissue optics, Ultrasonography, Transducers

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SPIE Journal Paper | 1 May 2011

32×32 pixel array complementary metal-oxide semiconductor imaging sensor for laser Doppler blood-flow measurement

Diwei He, Chayut Kongsavatsak, Barrie Hayes-Gill, John Crowe, Stephen Morgan

OE, Vol. 50, Issue 05, 054403, (May 2011) https://doi.org/10.1117/12.10.1117/1.3580661

KEYWORDS: Doppler effect, Sensors, Signal detection, Diffusers, Semiconductors, Signal processing, Calibration, Semiconductor lasers, Photodiodes, Digital signal processing

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Proceedings Article | 22 February 2011 Paper

Laser Doppler blood flow imaging with a 64x64 pixel full custom CMOS sensor

D. He, H. Nguyen, B. Hayes-Gill, Y. Zhu, J. Crowe, S. Morgan, G. Clough, C. Gill

Proceedings Volume 7891, 78910D (2011) https://doi.org/10.1117/12.873303

KEYWORDS: Blood circulation, Doppler effect, Signal detection, Diffusers, Sensors, CMOS sensors, Signal processing, Image processing, Digital signal processing, Filtering (signal processing)

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Proceedings Article | 19 February 2011 Paper

Characterization of tissue scaffolds using optics and ultrasound

N. Huynh, N. Parker, D. He, H. Ruan, B. Hayes-Gill, M. Mather, J. Crowe, F. R. A. Rose, M. J. Povey, S. Morgan

Proceedings Volume 7897, 789719 (2011) https://doi.org/10.1117/12.873302

KEYWORDS: Acoustics, Tissue optics, Ultrasonography, Modulation, Foam, Scattering, Transducers, Optical tomography, Light scattering, Reflection

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Proceedings Article | 18 February 2011 Paper

Application of a maximum likelihood algorithm to ultrasound modulated optical tomography

Nam Trung Huynh, Diwei He, Barrie Hayes-Gill, John Crowe, John Walker, Melissa Mather, Felicity R. A. J. Rose, Nicholas G. Parker, Malcolm J. Povey, Stephen Morgan

Proceedings Volume 7899, 78991C (2011) https://doi.org/10.1117/12.873365

KEYWORDS: Signal detection, Modulation, Transducers, Data modeling, Sensors, Ultrasonography, Scattering, Light scattering, Optical tomography, Absorption

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Proceedings Article | 8 July 2009 Paper

Investigation of optimum wavelengths for oximetry

Audrey Huong, Ian Stockford, John Crowe, Stephen Morgan

Proceedings Volume 7368, 736811 (2009) https://doi.org/10.1117/12.831603

KEYWORDS: Signal attenuation, Error analysis, Scattering, Blood oxygen saturation, Oxygen, Absorption, Oximetry, Light scattering, Interference (communication), Mass attenuation coefficient

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SPIE Journal Paper | 1 May 2009 Open Access

Experimental and theoretical evaluation of rotating orthogonal polarization imaging

Qun Zhu, Ian Stockford, John Crowe, Stephen Morgan

JBO, Vol. 14, Issue 03, 034006, (May 2009) https://doi.org/10.1117/12.10.1117/1.3130268

KEYWORDS: Polarization, Scattering, Monte Carlo methods, Dichroic materials, Reflection, Tissues, Target detection, Natural surfaces, Tissue optics, Polarizers

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Proceedings Article | 24 February 2009 Paper

Raman spectroscopy and rotating orthogonal polarization imaging for non-destructive tracking of collagen deposition in tissue engineered skin and tendon

Melissa Mather, Steve Morgan, David Morris, Qun Zhu, Jasmin Kee, Alina Zoladek, John Crowe, Ioan Notingher, David Williams, Penny Johnson

Proceedings Volume 7179, 71790A (2009) https://doi.org/10.1117/12.812221

KEYWORDS: Raman spectroscopy, Collagen, Skin, Tissues, Polarization, Tissue optics, Product engineering, Microscopes, Optics manufacturing, Manufacturing

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Proceedings Article | 23 February 2009 Paper

Full field laser Doppler flowmetry with custom made CMOS sensors

Diwei He, Nguyen Hoang, Barrie Hayes-Gill, John Crowe, Yiqun Zhu, Stephen Morgan

Proceedings Volume 7170, 71700J (2009) https://doi.org/10.1117/12.808819

KEYWORDS: Doppler effect, Signal processing, Digital signal processing, CMOS sensors, Diffusers, Blood circulation, Image processing, Sensors, Linear filtering, Imaging systems

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SPIE Journal Paper | 1 October 2008

Complementary metal-oxide-semiconductor imaging array with laser Doppler blood flow processing

Chayut Kongsavatsak, Diwei He, Barrie Hayes-Gill, John Crowe, Steve Morgan

OE, Vol. 47, Issue 10, 104401, (October 2008) https://doi.org/10.1117/12.10.1117/1.2993318

KEYWORDS: Doppler effect, Blood circulation, Signal processing, Filtering (signal processing), Digital signal processing, Imaging arrays, Analog electronics, Modulation, Laser processing, Sensors

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Proceedings Article | 6 February 2008 Paper

Rotating orthogonal polarization imaging for tissue imaging

Stephen Morgan, Qun Zhu, Ian Stockford, John Crowe

Proceedings Volume 6858, 68580A (2008) https://doi.org/10.1117/12.762318

KEYWORDS: Polarization, Monte Carlo methods, Tissues, Scattering, Reflection, Natural surfaces, Target detection, Polarizers, Dichroic materials, Linear polarizers

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Proceedings Article | 27 October 2006 Paper

Modelling and instrumentation for polarized light imaging and spectroscopy of scattering media

S. Morgan, B. Lu, I. Stockford, M. Pitter, J. Crowe, B. Hayes-Gill

Proceedings Volume 6047, 604712 (2006) https://doi.org/10.1117/12.710963

KEYWORDS: Polarization, Imaging spectroscopy, Light scattering, Spectroscopes, Sensors, Scattering, Modeling, Absorption, Scattering media, Reflection

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Proceedings Article | 21 July 2006 Paper

Comparison of techniques for overcoming scattering in spectroscopy

S. Morgan, Bo Lu, J. Crowe, I. Stockford

Proceedings Volume 6163, 61630H (2006) https://doi.org/10.1117/12.696959

KEYWORDS: Light scattering, Scattering, Absorption, Polarization, Signal attenuation, Photons, Signal to noise ratio, Spatial filters, Sensors, Spectroscopy

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Proceedings Article | 25 April 2005 Paper

Ultrasound modulated optical tomography using a CMOS modulated light lock-in pixel

Przemyslaw Dmochowski, Chunhua Li, Barrie Hayes-Gill, Matthew Clarke, John Crowe, Mike Somekh, Steve Morgan

Proceedings Volume 5697, (2005) https://doi.org/10.1117/12.593607

KEYWORDS: Modulation, Ultrasonography, Photodiodes, Cameras, Linear filtering, Amplifiers, Transistors, Capacitance, CMOS sensors, Sensors

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Proceedings Article | 29 July 2004 Paper

Integrated optical sensors for optoacoustic imaging of tissue

P. Dmochowski, Barrie Hayes-Gill, C. Li, Stephen Morgan, Matt Clark, John Crowe, Michael Somekh

Proceedings Volume 5486, (2004) https://doi.org/10.1117/12.572041

KEYWORDS: Modulation, Sensors, Signal detection, Ultrasonography, Tissue optics, Integrated optics, Photodiodes, Image sensors, Optical sensors, Linear filtering

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Proceedings Article | 29 July 2004 Paper

Laser Doppler blood flowmetry with FPGA processing

C. Kongsavatsak, D. He, Stephen Morgan, Barrie Hayes-Gill, John Crowe, Matt Clark

Proceedings Volume 5486, (2004) https://doi.org/10.1117/12.571996

KEYWORDS: Doppler effect, Blood, Field programmable gate arrays, Linear filtering, Modulation, Laser processing, Optical filters, Photodiodes, Diffusers, Signal detection

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Proceedings Article | 13 July 2004 Paper

A polarized light imaging instrument for characterizing skin lesions

Ian Stockford, Stephen Morgan, John Crowe, John Walker

Proceedings Volume 5326, (2004) https://doi.org/10.1117/12.529030

KEYWORDS: Polarization, Light scattering, Scattering, Absorption, Reflection, Skin, Tissue optics, Natural surfaces, Dielectric polarization, Tissues

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Proceedings Article | 18 May 1999 Paper

Wireless monitoring of highways

Richard Bennett, Barrie Hayes-Gill, John Crowe, Robert Armitage, Dale Rodgers, Adrian Hendroff

Proceedings Volume 3671, (1999) https://doi.org/10.1117/12.348667

KEYWORDS: Receivers, Temperature metrology, Transmitters, Microcontrollers, Binary data, Silicon, Control systems, Signal processing, Error control coding, Computer programming

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Proceedings Article | 30 December 1998 Paper

Measurement of in-vivo hemoglobin concentration using diffuse reflectance

Ashley Hunter, John Crowe, John Walker

Proceedings Volume 3566, (1998) https://doi.org/10.1117/12.334355

KEYWORDS: Absorption, Scattering, Monte Carlo methods, Tissues, Sensors, Diffuse reflectance spectroscopy, Optical properties, Error analysis, In vivo imaging, Picosecond phenomena

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Proceedings Article | 1 February 1994 Paper

Experimental study of continuous wave coherent techniques for optical transillumination

Michael Somekh, Roland Appel, Stephen Morgan, John Crowe

Proceedings Volume 2082, (1994) https://doi.org/10.1117/12.167484

KEYWORDS: Light scattering, Spatial resolution, Scattering, Confocal microscopy, Scattering media, Imaging systems, Sensors, Heterodyning, Laser scattering

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Proceedings Article | 2 March 1993 Paper

Dual-template optical correlator with interferometric detection for improved discrimination

Freddie Chin, Michael Somekh, John Crowe

Proceedings Volume 1732, (1993) https://doi.org/10.1117/12.140404

KEYWORDS: Optical correlators, Silicon, Holography, Holograms, Spatial filters, Interferometry, Signal processing, Signal to noise ratio, Phase shifts, Optical filters

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Proceedings Article | 1 August 1992 Paper

Dual template optical correlator for pattern recognition

Freddie Chin, Michael Somekh, M. Valera, John Crowe

Proceedings Volume 1647, (1992) https://doi.org/10.1117/12.60191

KEYWORDS: Optical correlators, Signal to noise ratio, Beam splitters, Mirrors, Interference (communication), Optical pattern recognition, Breast cancer, Holograms, Electronic filtering, Signal processing

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Showing 5 of 23 publications

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