Dr. Joseph Neev Profile

Dr. Joseph Neev

President at Femto-Sec Tech Inc

SPIE Involvement:

Author

Publications (31)

SPIE Journal Paper | 1 March 2010 Open Access

Femtosecond laser lithotripsy: feasibility and ablation mechanism

Jinze Qiu, Joel Teichman, Tianyi Wang, Joseph Neev, Randolph Glickman, Kin Foong Chan, Thomas Milner

JBO, Vol. 15, Issue 02, 028001, (March 2010) https://doi.org/10.1117/12.10.1117/1.3368998

KEYWORDS: Laser ablation, Femtosecond phenomena, Calculi, Plasma, Calculus, Laser lithotripsy, Pulsed laser operation, Laser therapeutics, Ferroelectric polymers, Photography

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Proceedings Article | 17 June 2002 Paper

Thermo-optical skin conditioning: a new method for thermally modifying skin conditions

Joseph Neev, Jennifer Links, Noam Calderon, Curt Littler, Theodore Kaufman, Robin Sun, Jeremy Links

Proceedings Volume 4609, (2002) https://doi.org/10.1117/12.443415

KEYWORDS: Skin, Tissues, Tissue optics, Gas lasers, Laser tissue interaction, Natural surfaces, Er:YAG lasers, Thermography, Thermal effects, Temperature metrology

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Background and Objective: Pulsed CO2 laser resurfacing improves photo-damage and acne scarring by removing abnormal tissue with subsequent regeneration and remodeling of collagen through heat induced collagen contraction. On the other extreme, Normal Mode Er:YAG lasers operate yielding ablative tissue removal with a thermal damage zone that can be limited to fewer then ten microns. This study introduces and evaluates the effectiveness of a new method of Thermo-optical Skin Conditioning (TSC). This method allows the user to induce tissue effects that span the entire range from the purely thermal tissue modification (CO2-like) to the highly mechanical effects induced by dermabrasion and Er:YAG lasers. TSC utilizes an optical energy in conjunction with a highly absorbing substance (HAS) deposited on a thin, thermally conductive intermediate material module (IMM) allowing the user to achieve optical to thermal energy conversion. The thermal energy is allowed specific interaction time determined by the scanning spatial pattern and scanning rate. The total amount of power density deposited in the tissue is a function of laser power, scan rate, spot size, and the synchronized action of the energy removal system (ERS) incorporated and synchronously activated at the end of the interaction period. Materials and Methods: A substance capable of efficiently absorbing laser light was applied to one side of an intermediate medium material to be placed in contact with the target skin. The intermediate medium material was then formed into a tape that was capable of advancing along a flat surface. An 810nm diode laser was used as an energy source. Galvanometer scanners and a lens were used to cover an area of approximately 50 mm2. Different power settings and scan rates determined the maximum power density and fluence at the target area. Following the experiments, the skin was then fixed in 10% Formalin and used for histological section preparations and optical light microscopy evaluation. The samples were then evaluated for histological changes and to measure ablation and thermal damage depth. In addition, measurements of thermal tissue response during and after the interaction were performed using both thermocouples and an infrared thermal camera. Results: Epidermis ablation ranged from as little as 10 ?m per pass, to as much as 50 ?m per pass. The depth of thermal damage decreased with scan frequency and with decreased laser power. Temperature increase ranged from 150C to as much as 900C. ERS temperature control allowed restoration of ambient temperature within less then 250 ms. TSC is shown to be a very effective method for inducing a range of tissue modification effects ranging from highly thermal to mechanical /non-thermal effects.

Proceedings Article | 23 May 2000 Paper

Short-pulse delivery through HWG

Israel Gannot, Oleg Konoplev, Joseph Neev

Proceedings Volume 3934, (2000) https://doi.org/10.1117/12.386352

KEYWORDS: Waveguides, Hollow waveguides, Silica, Diagnostics, Surgery, Target detection, Signal attenuation, Laser therapeutics, Beam shaping, Laser tissue interaction

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Proceedings Article | 18 May 1998 Paper

Ultrashort-pulse lasers: a new tool for biomedical applications

Joseph Neev

Proceedings Volume 3255, (1998) https://doi.org/10.1117/12.308208

KEYWORDS: Ultrafast phenomena, Laser tissue interaction, Pulsed laser operation, Laser applications, Biomedical optics, Laser ablation, Optical coherence tomography, Laser systems engineering, Fiber lasers, Imaging systems

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Proceedings Article | 18 May 1998 Paper

Preliminary characterization of hard dental tissue ablation with femtosecond lasers

Joseph Neev, Jeffrey Squier

Proceedings Volume 3255, (1998) https://doi.org/10.1117/12.308214

KEYWORDS: Laser ablation, Ultrafast phenomena, Laser tissue interaction, Cameras, Pulsed laser operation, Tissues, Laser dentistry, Laser applications, Temperature metrology, Laser systems engineering

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Proceedings Article | 22 May 1997 Paper

Acoustic measurements during holmium:YAG laser ablation of cadaveric human temporal bone: preliminary observations

Brian Wong, Lisa Gibbs, Joseph Neev, Janet Shanks

Proceedings Volume 2970, (1997) https://doi.org/10.1117/12.275042

KEYWORDS: Laser ablation, Bone, Pulsed laser operation, Acoustics, Ear, Laser therapeutics, Laser vision correction, Laser tissue interaction, Surgery, Tissues

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Proceedings Article | 17 May 1996 Paper

Applications of ultrashort pulse lasers for hard tissue surgery

Joseph Neev, William Carrasco, William Armstrong, Luiz Da Silva, Michael Feit, Dennis Matthews, Michael Perry, Alexander Rubenchik, Brent Stuart

Proceedings Volume 2671, (1996) https://doi.org/10.1117/12.239993

KEYWORDS: Laser ablation, Laser tissue interaction, Pulsed laser operation, Laser dentistry, Laser applications, Bone, Natural surfaces, Tissues, Ultrafast phenomena, Laser drilling

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Proceedings Article | 7 May 1996 Paper

Comparison of soft and hard tissue ablation with sub-ps and ns pulse lasers

Luiz Da Silva, Brent Stuart, Peter Celliers, T. Chang, Michael Feit, Michael Glinsky, Nicholas Heredia, Steve Herman, Stephen Lane, Richard London, Dennis Matthews, Joseph Neev, Michael Perry, Alexander Rubenchik

Proceedings Volume 2681, (1996) https://doi.org/10.1117/12.239573

KEYWORDS: Laser ablation, Picosecond phenomena, Pulsed laser operation, Laser tissue interaction, Tissues, Plasma, Laser dentistry, Collagen, Ultrafast phenomena, Temperature metrology

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Proceedings Article | 7 May 1996 Paper

Computational modeling of ultrashort-pulse ablation of enamel

Richard London, David Bailey, David Young, W. Alley, Michael Feit, Alexander Rubenchik, Joseph Neev

Proceedings Volume 2681, (1996) https://doi.org/10.1117/12.239580

KEYWORDS: Absorption, Laser ablation, Teeth, Tissues, Optical simulations, Laser tissue interaction, Plasma, Motion models, Computer simulations, Solids

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