Dr. Ratan K. Saha Profile

Dr. Ratan K. Saha

Associate Professor at IIIT Allahabad

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Author

Publications (15)

Proceedings Article | 11 August 2023 Paper

On the Born series methods for solving inhomogeneous Helmholtz equation in biomedical photoacoustics

Ujjal Mandal, Jagpreet Singh, Ratan Saha

Proceedings Volume 12631, 126310W (2023) https://doi.org/10.1117/12.2670935

KEYWORDS: Photoacoustic spectroscopy, Inhomogeneities, Biomedical optics, MATLAB, Wave equations, Tissues, Parallel computing, Fourier transforms

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Proceedings Article | 11 August 2023 Paper

Estimation of photoacoustic spectra for normal and pathological red blood cells using a modified Green’s function approach

Ratan Saha, Ujjal Mandal

Proceedings Volume 12631, 1263109 (2023) https://doi.org/10.1117/12.2670933

KEYWORDS: Red blood cells, Photoacoustic spectroscopy, Inhomogeneities, Wave equations, Monte Carlo methods, Optoacoustics, Deformation

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Proceedings Article | 7 April 2023 Poster + Paper

System matrix approach for attenuation compensation in photoacoustic tomography

Pankaj Warbal, Ratan Saha

Proceedings Volume 12463, 1246332 (2023) https://doi.org/10.1117/12.2654123

KEYWORDS: Signal attenuation, Image restoration, Reconstruction algorithms, Matrices, Tissues, Wave propagation, Acoustics, Acoustic waves, Dispersion, Signal detection

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Proceedings Article | 9 December 2021 Paper

Removal of blurring induced by band-limited transducers and broad laser pulse in photoacoustic tomography

Pankaj Warbal, Ratan Saha

Proceedings Volume 11923, 1192304 (2021) https://doi.org/10.1117/12.2615848

KEYWORDS: Signal to noise ratio, Reconstruction algorithms, Pulsed laser operation, Transducers, Sensors, Photoacoustic tomography, Image quality, Image restoration, Acquisition tracking and pointing, Signal detection

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Proceedings Article | 19 July 2019 Paper

A robust modified delay-and-sum algorithm for photoacoustic tomography imaging with apodized sensors

Pankaj Warbal, Manojit Pramanik, Ratan Saha

Proceedings Volume 11077, 1107713 (2019) https://doi.org/10.1117/12.2527025

KEYWORDS: Sensors, Reconstruction algorithms, Detection and tracking algorithms, Transducers, Signal detection, Apodization, Image restoration, Photoacoustic tomography, Acquisition tracking and pointing, Image sensors

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Proceedings Article | 19 July 2019 Paper

Use of angular distribution of differential photoacoustic cross-section data for estimating source size

Anuj Kaushik, Deepak Sonker, Ratan Saha

Proceedings Volume 11077, 110770E (2019) https://doi.org/10.1117/12.2526991

KEYWORDS: Particles, Light scattering, Photoacoustic spectroscopy, Scattering, Data analysis, Monte Carlo methods

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Proceedings Article | 3 March 2017 Paper

Rapid computation of photoacoustic fields from normal and pathological red blood cells using a Green's function method

Ratan Saha, Muhannad Fadhel, Aamna Lawrence, Subhajit Karmakar, Arunabha Adhikari, Michael Kolios

Proceedings Volume 10064, 100644U (2017) https://doi.org/10.1117/12.2253555

KEYWORDS: Particles, Photoacoustic spectroscopy, Blood, Microscopy, Microfluidics, 3D modeling, Numerical integration, Ultrasonics, Ultrasonography, Optical spheres, Transducers, Mathematical modeling, Sensors, Acoustics

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Proceedings Article | 11 March 2015 Paper

Realistic photoacoustic image simulations of collections of solid spheres using linear array transducer

Subhajit Karmakar, Eno Hysi, Michael Kolios, Ratan Saha

Proceedings Volume 9323, 932339 (2015) https://doi.org/10.1117/12.2080794

KEYWORDS: Transducers, Photoacoustic spectroscopy, Solids, Optical spheres, Signal detection, Tissues, Ultrasonography, Particles, Photoacoustic tomography, Tomography

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Proceedings Article | 3 March 2014 Paper

Probing confined and unconfined hemoglobin molecules with photoacoustics

Ratan Saha, Subhajit Karmakar, Madhusudan Roy

Proceedings Volume 8943, 89434L (2014) https://doi.org/10.1117/12.2040403

KEYWORDS: Blood, Photoacoustic spectroscopy, Light scattering, Molecules, Laser energy, Protactinium, In vitro testing, Tissue optics, Tissues, Transducers

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Proceedings Article | 4 March 2013 Paper

Photoacoustic assessment of oxygen saturation: effect of red blood cell aggregation

Eno Hysi, Ratan Saha, Michael Kolios

Proceedings Volume 8581, 85813T (2013) https://doi.org/10.1117/12.2004960

KEYWORDS: Blood, Oxygen, Photoacoustic spectroscopy, Tissues, Near infrared spectroscopy, Light scattering, Neodymium, Ultrasonography, Ions, Absorption

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SPIE Journal Paper | 12 December 2012 Open Access

Photoacoustic ultrasound spectroscopy for assessing red blood cell aggregation and oxygenation

Eno Hysi, Ratan Saha, Michael Kolios

JBO, Vol. 17, Issue 12, 125006, (December 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.12.125006

KEYWORDS: Blood, Transducers, Photoacoustic spectroscopy, Ultrasonography, Spectroscopy, Monte Carlo methods, Absorption, Oxygen, Signal detection, Tissues

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SPIE Journal Paper | 18 May 2012 Open Access

Validity of a theoretical model to examine blood oxygenation dependent optoacoustics

Ratan Saha, Madhusudan Roy, Subhajit Karmakar, Eno Hysi, Michael Kolios

JBO, Vol. 17, Issue 5, 055002, (May 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.5.055002

KEYWORDS: Blood, Signal detection, Absorption, Molecules, Monte Carlo methods, Receivers, Transducers, Ultrasonography, Computer simulations, Laser sources

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Proceedings Article | 23 February 2012 Paper

Detection and characterization of red blood cell (RBC) aggregation with photoacoustics

Eno Hysi, Ratan Saha, Min Rui, Michael Kolios

Proceedings Volume 8223, 82233E (2012) https://doi.org/10.1117/12.908685

KEYWORDS: Transducers, Silver, Blood, Signal detection, Photoacoustic spectroscopy, Tissues, Calibration, Gold, Acoustics, Spherical lenses

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Proceedings Article | 16 February 2012 Paper

On the potential of using photoacoustic spectroscopy for monitoring red blood cell aggregation

Eno Hysi, Ratan Saha, Michael Kolios

Proceedings Volume 8222, 82220Q (2012) https://doi.org/10.1117/12.928257

KEYWORDS: Blood, Transducers, Spectroscopy, Tissue optics, Ultrasonography, Photoacoustic spectroscopy, Plasma, Absorption, Signal detection, Tissues

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SPIE Journal Paper | 1 November 2011 Open Access

Effects of erythrocyte oxygenation on optoacoustic signals

Ratan Saha, Michael Kolios

JBO, Vol. 16, Issue 11, 115003, (November 2011) https://doi.org/10.1117/12.10.1117/1.3655355

KEYWORDS: Blood, Oxygen, Monte Carlo methods, Absorption, Laser sources, Molecules, Computer simulations, Optical spheres, Blood oxygen saturation, Radon

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