Dr. Duncan J. Maitland Profile

Dr. Duncan J. Maitland

Professor at Texas A&M Univ

SPIE Involvement:

Conference Program Committee | Author

Publications (21)

SPIE Journal Paper | 1 March 2008

Fabrication and characterization of cylindrical light diffusers comprised of shape memory polymer

Ward Small, Patrick Buckley, Thomas Wilson, Jeffrey Loge, Kristen Maitland, Duncan Maitland

JBO Vol. 13 Issue 02

KEYWORDS: Diffusers, Optical fibers, Diffusion, Shape memory polymers, Foam, Sensors, Biomedical optics, Absorption, Laser damage threshold, Integrating spheres

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SPIE Journal Paper | 1 May 2007

Prototype laser-activated shape memory polymer foam device for embolic treatment of aneurysms

Duncan Maitland, Ward Small, Jason Ortega, Patrick Buckley, Jennifer Rodriguez, Jonathan Hartman, Thomas Wilson

JBO Vol. 12 Issue 03

KEYWORDS: Foam, Shape memory polymers, Prototyping, Optical fibers, Polymers, Data modeling, Instrument modeling, Neck, Arteries, Semiconductor lasers

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Proceedings Article | 12 November 2005

Shape memory polymer therapeutic devices for stroke

Thomas Wilson, Ward Small IV, William Benett, Jane Bearinger, Duncan Maitland

Proc. SPIE. 6007, Smart Medical and Biomedical Sensor Technology III

KEYWORDS: Optical fibers, Polyurethane, Biomedical optics, Ischemic stroke, Polymers, Glasses, Microactuators, Blood circulation, Aluminum, Shape memory polymers

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SPIE Journal Paper | 1 July 2002

Comparative study of polarized light propagation in biologic tissues

Vanitha Sankaran, Joseph Walsh, Duncan Maitland

JBO Vol. 7 Issue 03

KEYWORDS: Tissues, Polarization, Light scattering, Scattering, Blood, Optical fibers, Birefringence, Arteries, Sensors, Geometrical optics

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Proceedings Article | 21 June 2002

Laser-activated shape memory polymer microactuators for treating stroke

Duncan Maitland, Thomas Wilson, Melodie Metzger, Daniel Schumann

Proc. SPIE. 4626, Biomedical Nanotechnology Architectures and Applications

KEYWORDS: Actuators, Ischemic stroke, Optical properties, Blood, Blood vessels, Microactuators, Shape memory alloys, Shape memory polymers, Temperature metrology, Absorption

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Proceedings Article | 28 April 2000

Polarized light propagation through tissue and tissue phantoms

Vanitha Sankaran, Joseph Walsh, Duncan Maitland

Proc. SPIE. 3915, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications IV

KEYWORDS: Optical spheres, Polarization, Tissues, Scattering, Blood, Particles, Light scattering, Rayleigh scattering, Mie scattering, Tissue optics

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Proceedings Article | 28 April 2000

Monte-Carlo simulations of arterial imaging with optical coherence tomography

Peter Amendt, Kent Estabrook, Matthew Everett, Richard London, Duncan Maitland, George Zimmerman, Bill Colston, Luiz Da Silva, Ujwal Sathyam

Proc. SPIE. 3915, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications IV

KEYWORDS: Coherence imaging, Scattering, Optical coherence tomography, Laser scattering, Monte Carlo methods, Mie scattering, Tissue optics, Signal detection, Photon transport, Anisotropy

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Proceedings Article | 6 April 2000

Polarized light propagation in biologic tissue and tissue phantoms

Vanitha Sankaran, Joseph Walsh, Duncan Maitland

Proc. SPIE. 4001, Saratov Fall Meeting '99: Optical Technologies in Biophysics and Medicine

KEYWORDS: Optical spheres, Polarization, Tissues, Scattering, Blood, Photons, Light scattering, Rayleigh scattering, Mie scattering, Tissue optics

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Proceedings Article | 30 April 1999

Polarized light propagation in turbid media

Vanitha Sankaran, Duncan Maitland, Joseph Walsh

Proc. SPIE. 3598, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications III

KEYWORDS: Linear polarizers, Polarization, Birefringence, Tissues, Scattering, Photons, Light scattering, Polarizers, Tissue optics, Spherical lenses

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Proceedings Article | 14 January 1998

Simulation studies of vapor bubble generation by short-pulse lasers

Peter Amendt, Richard London, Moshe Strauss, Michael Glinsky, Duncan Maitland, Peter Celliers, Steven Visuri, David Bailey, David Young, Darwin Ho, Charles Lin, Michael Kelly

Proc. SPIE. 3195, Laser-Tissue Interaction, Tissue Optics, and Laser Welding III

KEYWORDS: Laser vision correction, Fiber optics, Laser energy, Laser applications, Laser development, Computer simulations, Optical simulations, Picosecond phenomena, Pulsed laser operation, Absorption

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SPIE Journal Paper | 1 January 1998

Experimental and computational laser tissue welding using a protein patch

Ward Small, Nicholas Heredia, Duncan Maitland, David Eder, Peter Celliers, Luiz Da Silva, Richard London, Dennis Matthews

JBO Vol. 3 Issue 01

KEYWORDS: Laser tissue interaction, Natural surfaces, Laser welding, Monte Carlo methods, Tissues, Temperature metrology, Optical simulations, Proteins, Infrared radiation, Arteries

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Proceedings Article | 16 June 1997

Simulations of laser-initiated stress waves

Duncan Maitland, Peter Celliers, Peter Amendt, Luiz Da Silva, Richard London, Dennis Matthews, Moshe Strauss, Steven Visuri

Proc. SPIE. 2975, Laser-Tissue Interaction VIII

KEYWORDS: Refractive index, Water, Laser energy, Fiber lasers, Monte Carlo methods, Wave propagation, Optical simulations, Cavitation, Pulsed laser operation, Absorption

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Proceedings Article | 16 June 1997

Modeling of bubble dynamics in relation to medical applications

Peter Amendt, Moshe Strauss, Richard London, Michael Glinsky, Duncan Maitland, Peter Celliers, Steven Visuri, David Bailey, David Young, Darwin Ho

Proc. SPIE. 2975, Laser-Tissue Interaction VIII

KEYWORDS: Modeling, Laser therapeutics, Laser vision correction, Data modeling, Interfaces, Laser applications, Laser safety, Acoustics, Spherical lenses, Absorption

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Proceedings Article | 16 June 1997

Computational modeling of stress transient and bubble evolution in short-pulse laser-irradiated melanosome particles

Moshe Strauss, Peter Amendt, Richard London, Duncan Maitland, Michael Glinsky, Charles Lin, Michael Kelly

Proc. SPIE. 2975, Laser-Tissue Interaction VIII

KEYWORDS: Superposition, Injuries, Laser energy, Particles, Laser irradiation, Optical simulations, Laser damage threshold, Pulsed laser operation, Atmospheric particles, Absorption

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Laser injury by sub-nanosecond pulses in the eye and skin is related to strongly absorbing pigment particles such as melanin with dimension of order 10-15 nm. Single melanosomes, with size of approximately 1 micrometers and containing many such melanin particles, were isolated in water and irradiated with 100 psec pulses. Using time resolved imaging techniques, they observed the emission of a strong shock wave followed by rapid bubble expansion on a nanosecond timescale. The shock had a supersonic speed of approximately 2700 m/sec and an initial pressure of nearly 35 kbars. The shock wave can induce further tissue damage in addition to that produced by the bubble expansion and reduce the threshold for laser damage in the retina. In this work we simulate the system by using the hydrodynamic computer code LATIS with a realistic equation of state for water. We simulate both isolated melanin particles and whole melanosomes. Our melanosome model considers a spherical structure of order 1 micrometers in diameter with a uniform energy. This is consistent with the fact that the melanin particles are not stress confined while the melanosome is almost stress confined; thus, the pressure builds up uniformly in the melanosome. The details of the dynamics of the supersonic shock wave emission and rapid bubble evolution on both the melanin and melanosome scales are investigated. Comparison between modeling and experiments is presented. In order to achieve peak pressures and shock speeds comparable to the reported values, it is necessary to model the melanosome as having an absorption coefficient of approximately 6000 cm<SUP>-1</SUP>. Another way to achieve agreement with experiment is if the superposition of shock waves from the many melanin particles inside the melanosome produces a stronger shock than calculated by assuming a smooth absorption, as in our melanosome model. A better experimental determination of the values of linear and non- linear absorption coefficients for a single melanosome is needed in order to decide between the two approaches.

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Proceedings Article | 22 May 1997

In vivo argon laser vascular welding using thermal feedback: open- and closed-loop patency and collagen crosslinking

Ward Small, Peter Celliers, George Kopchok, Karen Reiser, Nicholas Heredia, Duncan Maitland, David Eder, Richard London, Mauricio Heilbron, Farabi Hussain, Rodney White, Luiz Da Silva, Dennis Matthews

Proc. SPIE. 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII

KEYWORDS: Optical fibers, Veins, Tissues, Argon ion lasers, Control systems, Collagen, Infrared radiation, In vivo imaging, Feedback control, Natural surfaces

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Proceedings Article | 22 May 1997

Laser welding and collagen crosslinks

Karen Reiser, Ward Small, Duncan Maitland, Nicholas Heredia, Luiz Da Silva, Dennis Matthews, Jerold Last

Proc. SPIE. 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII

KEYWORDS: Wound healing, Tissues, Laser welding, Indocyanine green, Collagen, Semiconductor lasers, Laser stabilization, Biological research, Sodium, Laser tissue interaction

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Proceedings Article | 17 May 1996

Dynamic simulations of tissue welding

Duncan Maitland, David Eder, Richard London, Michael Glinsky, Barbara Soltz

Proc. SPIE. 2671, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VI

KEYWORDS: Tissues, Skin, Diffusion, Laser welding, Computer simulations, Optical simulations, Tissue optics, Natural surfaces, Thermal modeling, Laser tissue interaction

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Proceedings Article | 17 May 1996

Laser tissue welding mediated with a protein solder

Ward Small, Nicholas Heredia, Peter Celliers, Luiz Da Silva, David Eder, Michael Glinsky, Richard London, Duncan Maitland, Dennis Matthews, Barbara Soltz

Proc. SPIE. 2671, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VI

KEYWORDS: Proteins, Tissues, Laser welding, Arteries, Indocyanine green, Semiconductor lasers, Infrared detection, Natural surfaces, Laser tissue interaction, Fusion energy

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Proceedings Article | 17 May 1996

Computational modeling of laser thrombolysis for stroke treatment

Moshe Strauss, Peter Amendt, Richard London, Duncan Maitland, Michael Glinsky, Peter Celliers, David Bailey, David Young, Steven Jacques

Proc. SPIE. 2671, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VI

KEYWORDS: Laser therapeutics, Computational modeling, Tissues, Blood, Water, Laser energy, Cavitation, Pulsed laser operation, Failure analysis, Absorption

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