Search Results - "Vasu, R. M"

Variance-Reduced Particle Filters for Structural System Identification Problems by Chowdhury, S. Roy, Roy, D, Vasu, R. M

“…AbstractA few variance reduction schemes are proposed within the broad framework of a particle filter as applied to the problem of structural system…”
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Reconstruction of optical properties of low-scattering tissue using derivative estimated through perturbation Monte-Carlo method by Kumar, Y Phaneendra, Vasu, R M

“…An iterative method for the reconstruction of optical properties of a low-scattering object, which uses a Monte-Carlo-based forward model, is developed. A…”
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Diffuse optical tomography through solving a system of quadratic equations: theory and simulations by Kanmani, B, Vasu, R M

“…This paper discusses the iterative solution of the nonlinear problem of optical tomography. In the established forward model-based iterative image…”
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New computational approaches for wrinkled and slack membranes by Pimprikar, N.A., Banerjee, B., Roy, D., Vasu, R.M., Reid, S.R.

“…The static response of thin, wrinkled membranes is studied using both a tension field approximation based on plane stress conditions and a 3D nonlinear…”
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Design, fabrication, and characterization of a tissue-equivalent phantom for optical elastography by Devi, C Usha, Vasu, R M, Sood, A K

“…We suitably adapt the design of a tissue-equivalent phantom used for photoacoustic imaging to construct phantoms for optical elastography. The elastography…”
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Generalized eigenvalue decomposition of the field autocorrelation in correlation diffusion of photons in turbid media by Hyvönen, N., Nandakumaran, A. K., Varma, H. M., Vasu, R. M.

“…We propose a novel numerical method based on a generalized eigenvalue decomposition for solving the diffusion equation governing the correlation diffusion of…”
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Convergence analysis of the Newton algorithm and a pseudo-time marching scheme for diffuse correlation tomography by Varma, Hari M, Banerjee, B, Roy, D, Nandakumaran, A K, Vasu, R M

“…We propose a self-regularized pseudo-time marching scheme to solve the ill-posed, nonlinear inverse problem associated with diffuse propagation of coherent…”
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Application of ultrasound-tagged photons for measurement of amplitude of vibration of tissue caused by ultrasound: theory, simulation, and experiments by Devi, C Usha, Vasu, R M, Sood, A K

“…We investigate the modulation of an optical field caused by its interaction with an ultrasound beam in a tissue mimicking phantom. This modulation appears as a…”
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Diffuse optical tomography using intensity measurements and the a priori acquired regions of interest: theory and simulations by Kanmani, B, Vasu, R M

“…Light transmission data collected around an object show large variation with source-detector separation owing to the presence of single or multiple…”
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Accelerated gradient based diffuse optical tomographic image reconstruction by Biswas, Samir Kumar, Rajan, K., Vasu, R. M.

“…Purpose: Fast reconstruction of interior optical parameter distribution using a new approach called Broyden-based model iterative image reconstruction…”
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Ultrasound-modulated optical tomography: direct recovery of elasticity distribution from experimentally measured intensity autocorrelation by Mohanan, K P, Nandakumaran, A K, Roy, D, Vasu, R M

“…Based on an ultrasound-modulated optical tomography experiment, a direct, quantitative recovery of Young's modulus (E) is achieved from the modulation depth…”
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A Kushner–Stratonovich Monte Carlo filter applied to nonlinear dynamical system identification by Sarkar, S., Chowdhury, S.R., Venugopal, M., Vasu, R.M., Roy, D.

“…A Monte Carlo filter, based on the idea of averaging over characteristics and fashioned after a particle-based time-discretized approximation to the…”
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A pseudo-dynamic sub-optimal filter for elastography under static loading and measurements by Banerjee, B, Roy, D, Vasu, R M

“…We propose a pseudo-dynamic form of a sub-optimal Kalman filter for elastography of plane-strain models of soft tissues under strictly static deformations and…”
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Wavelet based compression and denoising of optical tomography data by Nath, Sumit K., Vasu, R.M., Pandit, M.

“…Two methods based on wavelet/wavelet packet expansion to denoise and compress optical tomography data containing scattered noise are presented. In the first,…”
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Self-regularized pseudo time-marching schemes for structural system identification with static measurements by Banerjee, B., Roy, D., Vasu, R. M.

“…We explore the application of pseudo time marching schemes, involving either deterministic integration or stochastic filtering, to solve the inverse problem of…”
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Noise-tolerance analysis for detection and reconstruction of absorbing inhomogeneities with diffuse optical tomography using single- and phase-correlated dual-source schemes by Kanmani, B, Vasu, R M

“…An iterative reconstruction procedure is used to invert intensity data from both single- and phase-correlated dual-source illuminations for absorption…”
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Wrinkled and slack membranes: nonlinear 3D elasticity solutions via smooth DMS-FEM and experiment by Sunilkumar, N., Lalmoni, G., Roy, D., Reid, S. R., Vasu, R. M.

“…SUMMARY The smooth DMS‐FEM, recently proposed by the authors, is extended and applied to the geometrically nonlinear and ill‐posed problem of a deformed and…”
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Assessment of ultrasound modulation of near infrared light on the quantification of scattering coefficient by Singh, M. Suheshkumar, Yalavarthy, Phaneendra K., Vasu, R. M., Rajan, K.

“…Purpose: To assess the effect of ultrasound modulation of near infrared (NIR) light on the quantification of scattering coefficient in tissue-mimicking…”
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Tomographic imaging of phase objects in turbid media through quantitative estimate of phase of ballistic light by Ganesh Chandan, G, Vasu, R.M, Asokan, S

“…We demonstrate experimental measurement of phase of the ballistic and near-ballistic component of light transmitted through scattering media. This is done…”
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Implementation of a phase array diffuse optical tomographic imager by Rajan, K, Vijayakumar, V, Biswas, Samir Kumar, Vasu, R M

“…Diffuse optical tomography (DOT) using near-infrared (NIR) light is a promising tool for noninvasive imaging of deep tissue. This technique is capable of…”
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