Prof. Swapan K. Gayen Profile

Prof. Swapan K. Gayen

Professor of Physics at City College of New York

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Author

Publications (20)

Proceedings Article | 4 March 2014 Paper

Fluorescence spectroscopy using excitation and emission matrix for quantification of tissue native fluorophores and cancer diagnosis

Binlin Wu, S. Gayen, M. Xu

Proceedings Volume 8926, 89261M (2014) https://doi.org/10.1117/12.2040985

KEYWORDS: Tissues, Luminescence, Cancer, Tissue optics, Collagen, Fluorescence spectroscopy, Prostate, Biopsy, Tumors, Spectroscopy

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Proceedings Article | 13 March 2013 Paper

Time reversal optical tomography locates fluorescent targets in a turbid medium

Binlin Wu, W. Cai, S. Gayen

Proceedings Volume 8574, 85740N (2013) https://doi.org/10.1117/12.2002898

KEYWORDS: Luminescence, Target detection, Optical tomography, Scattering, Sensors, Breast, Absorption, Light wave propagation, 3D acquisition, Near infrared

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Proceedings Article | 29 February 2012 Paper

Time-reversal optical tomography: detecting and locating extended targets in a turbid medium

Binlin Wu, W. Cai, M. Xu, S. Gayen

Proceedings Volume 8216, 82160K (2012) https://doi.org/10.1117/12.906799

KEYWORDS: Scattering, Geometrical optics, Target detection, Optical tomography, Diffusion, Light scattering, Optical properties, Sensors, Absorption, Biomedical optics

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Proceedings Article | 9 February 2012 Paper

Systematic studies of fractal dimension parameters, absorption and scattering coefficients for cancerous and normal prostate tissues

Yang Pu, Wubao Wang, M. Alrubaiee, S. Gayen, Min Xu

Proceedings Volume 8207, 82071H (2012) https://doi.org/10.1117/12.913945

KEYWORDS: Tissues, Prostate, Scattering, Fractal analysis, Particles, Light scattering, Absorption, Mie scattering, Anisotropy, Tumor growth modeling

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Proceedings Article | 15 June 2011 Paper

Multi-wavelength diffusive optical tomography using independent component analysis and time reversal algorithms

M. Alrubaiee, Binlin Wu, M. Xu, W. Cai, J. Koutcher, S. Gayen

Proceedings Volume 8088, 80880Y (2011) https://doi.org/10.1117/12.889982

KEYWORDS: Tumors, Geometrical optics, Breast, Magnetic resonance imaging, Independent component analysis, Tissues, Optical tomography, Inverse optics, Target detection, Tissue optics

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Proceedings Article | 10 February 2011 Paper

Three dimensional time reversal optical tomography

Binlin Wu, W. Cai, M. Alrubaiee, M. Xu, S. Gayen

Proceedings Volume 7892, 78920G (2011) https://doi.org/10.1117/12.875982

KEYWORDS: Target detection, Scattering, Sensors, Light scattering, Breast, Absorption, Optical tomography, Spatial resolution, 3D acquisition, Breast cancer

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Proceedings Article | 3 March 2008 Paper

Raman spectroscopic study of acute oxidative stress induced changes in mice skeletal muscles

Vidyasagar Sriramoju, Alexandra Alimova, Rahul Chakraverty, A. Katz, S. Gayen, L. Larsson, H. Savage, R. Alfano

Proceedings Volume 6853, 685315 (2008) https://doi.org/10.1117/12.761277

KEYWORDS: Raman spectroscopy, Tissues, Luminescence, Oxygen, Fluorescence spectroscopy, Spectroscopy, Ions, Hydrogen, In vivo imaging, Oxidation

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Proceedings Article | 21 February 2007 Paper

Determination of light absorption, scattering and anisotropy factor of a highly scattering medium using backscattered circularly polarized light

M. Xu, M. Alrubaiee, S. Gayen, R. Alfano

Proceedings Volume 6435, 64350J (2007) https://doi.org/10.1117/12.703578

KEYWORDS: Light scattering, Scattering, Absorption, Anisotropy, Laser scattering, Diffuse reflectance spectroscopy, Fractal analysis, Tissue optics, Tissues, Optical properties

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Proceedings Article | 13 February 2007 Paper

Polarization memory effect and visibility improvement of targets in turbid media

Xiaohui Ni, S. Kartazayeva, Wubao Wang, Wei Cai, S. Gayen, R. Alfano

Proceedings Volume 6434, 64340N (2007) https://doi.org/10.1117/12.701315

KEYWORDS: Surface plasmons, Polarization, Light scattering, Scattering, Particles, Backscatter, Radiative transfer, Visibility through fog, Visibility, Atmospheric particles

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Proceedings Article | 13 February 2007 Paper

Optical high resolution cross section imaging of a human breast model using independent component analysis

M. Xu, M. Alrubaiee, S. Gayen, H. Savage, R. Alfano

Proceedings Volume 6434, 643416 (2007) https://doi.org/10.1117/12.703574

KEYWORDS: Breast, Scattering, Tissues, Independent component analysis, Tissue optics, Light, Cancer, Image resolution, Absorption, Optical imaging

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Proceedings Article | 22 February 2006 Paper

Time-resolved ring structure of backscattered circularly polarized beams from forward scattering layered structures

Kevin Phillips, M. Xu, S. Gayen, R. Alfano

Proceedings Volume 6091, 609109 (2006) https://doi.org/10.1117/12.654473

KEYWORDS: Scattering, Photons, Absorption, Light scattering, Particles, Backscatter, Scattering media, Laser scattering, Anisotropy, Polarization

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The backscattering of circularly polarized light at normal incidence to a half-space composed of two index matched layers with different absorption coefficients is studied using the Electric Field Monte Carlo method. The top layer, of thickness L₁ = 2.5[l_s], where l_s is the scattering length, is non-absorbing and is composed of particles suspended in water with anistropy factor g = 0.8. The bottom layer, of thickness L₂ = 25[l_s], is composed of absorbing particles with g = 0.8. The backscattered light with the same helicity (co-polarized) as the incident beam emerging from the top surface is analyzed in the time domain as absorption in the second layer increases from 1% to 10% of the scattering coefficient, μs. For the case of a homogenous half-space, composed of non absorbing particles with anisotropy factor g = 0.8, a ring-peak is known to be observed in the time-resolved co-polarized backscattered light intensity. For the two layer geometry tested here, a similar ring structure is found and used to determine the path length of photons traveling in the second layer. In recent studies, the ring-peak was postulated to be comprised of photons undergoing semi-circular trajectories as a result of near forward scattering events in the forward scattering media. This ideal picture of photon trajectories is tested and found to be an accurate characterization of photon trajectories in forward scattering media. Specifically, it is shown that time-sliced measurements of the backscattered co-polarized intensity at the ring-peak and path lengths of photons determined from the segment of arc of their idealized semi-circluar trajectories in the second layer can be used in conjunction with Beer's law to reproduce the known absorption coefficient of the second layer. This is a first indication that photons contributing to the ring-peak in co-polarized backscatter follow semi-circular trajectories. Moreover, it demonstrates that ring-structure can be used to determine subsurface features such as absorption coefficients in layered structures.

SPIE Journal Paper | 1 September 2005 Open Access

Optical imaging of turbid media using independent component analysis: theory and simulation

M. Xu, Mohammad Alrubaiee, Swapan Gayen, Robert Alfano

JBO, Vol. 10, Issue 05, 051705, (September 2005) https://doi.org/10.1117/12.10.1117/1.2101568

KEYWORDS: Scattering, Absorption, Independent component analysis, Sensors, Light scattering, Diffusion, Optical imaging, Geometrical optics, Signal to noise ratio, Light

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Proceedings Article | 28 April 2005 Paper

Three-dimensional optical tomography of objects in turbid media using the round-trip matrix

W. Cai, M. Alrubaiee, S. Gayen, M. Xu, R. Alfano

Proceedings Volume 5693, (2005) https://doi.org/10.1117/12.591082

KEYWORDS: Sensors, Light, Optical tomography, Optical imaging, Scattering, Detection and tracking algorithms, Acoustics, Light scattering, 3D modeling

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Proceedings Article | 28 April 2005 Paper

Optical tomography using independent component analysis to detect absorptive, scattering, or fluorescent inhomogeneities in turbid media

M. Xu, M. Alrubaiee, S. Gayen, R. Alfano

Proceedings Volume 5693, (2005) https://doi.org/10.1117/12.592153

KEYWORDS: Independent component analysis, Scattering, Sensors, Luminescence, Light scattering, Light, Geometrical optics, Absorption, Diffusion, Optical tomography

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Proceedings Article | 28 April 2005 Paper

Fluorescence optical tomography using independent component analysis to detect small targets in turbid media

M. Alrubaiee, M. Xu, S, Gayen, R. Alfano

Proceedings Volume 5693, (2005) https://doi.org/10.1117/12.591961

KEYWORDS: Luminescence, Independent component analysis, Target detection, Optical tomography, Tomography, Optical spheres, Optical spectroscopy, Spectroscopy, Tissue optics, Biotechnology

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Proceedings Article | 8 September 2004 Paper

Time-resolved and quasi-continuous wave three-dimensional tomographic imaging of objects in tissue-like turbid media

Mohammad Alrubaiee, Min Xu, S. Gayen, Wei Cai, R. Alfano

Proceedings Volume 5463, (2004) https://doi.org/10.1117/12.545897

KEYWORDS: Scattering, Independent component analysis, 3D image processing, Continuous wave operation, Sensors, Imaging systems, Tissues, Tomography, Absorption, Cameras

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Proceedings Article | 29 July 2003 Paper

Cancerous and normal human tissues investigated by near-infrared time-resolved spectroscopic imaging techniques

Mohammad Alrubaiee, Swapan Gayen, Jason Koutcher, Robert Alfano

Proceedings Volume 4955, (2003) https://doi.org/10.1117/12.477346

KEYWORDS: Tissues, Tumors, Imaging spectroscopy, Spectroscopy, Breast, Optical imaging, Cancer, Near infrared spectroscopy, Time resolved spectroscopy, Imaging systems

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Proceedings Article | 15 July 1999 Paper

Spectroscopic and time-sliced imaging of human breast tissue

S. Gayen, M. Zevallos, Bidyut Das, Robert Alfano

Proceedings Volume 3597, (1999) https://doi.org/10.1117/12.356851

KEYWORDS: Tissues, Imaging spectroscopy, Breast, Spectroscopy, Imaging systems, Picosecond phenomena, Mammography, Absorption, Cameras, Light scattering

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Proceedings Article | 15 July 1999 Paper

Time-sliced three-dimensionalinverse image reconstruction of objects in highly scattering media

M. Xu, S. Gayen, Wei Cai, M. Zevallos, Melvin Lax, Robert Alfano

Proceedings Volume 3597, (1999) https://doi.org/10.1117/12.356802

KEYWORDS: Image restoration, Absorption, Diffusion, Scattering, Sensors, 3D image reconstruction, 3D image processing, Scattering media, Laser scattering, Reconstruction algorithms

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Proceedings Article | 18 August 1997 Paper

Time-gated images of calcification regions in turbid media

Peng Ho, Pierre Galland, X. Liang, LeMing Wang, Stavros Demos, S. Gayen, Robert Alfano

Proceedings Volume 2979, (1997) https://doi.org/10.1117/12.280234

KEYWORDS: Breast cancer, Breast, Calcium, Particles, Scattering, Picosecond phenomena, Cancer, Tissues, Imaging systems, Scattering media

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