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List of works by Tomy Varghese

A COMPARISON OF MODEL BASED AND DIRECT OPTIMIZATION BASED FILTERING ALGORITHMS FOR SHEARWAVE VELOCITY RECONSTRUCTION FOR ELECTRODE VIBRATION ELASTOGRAPHY.

scientific article

A deconvolution filter for improvement of time-delay estimation in elastography

scientific article published on 01 January 1998

A general solution for catheter position effects for strain estimation in intravascular elastography

scientific article published in November 2005

A kernel smoothing algorithm for ablation visualization in ultrasound elastography

scientific article published on 14 December 2018

A method for experimental characterization of the noise performance of elastographic systems

scientific article published in January 1999

A novel saline infusion sonohysterography-based strain imaging approach for evaluation of uterine abnormalities in vivo: preliminary results

scientific article published on April 2012

A review of carotid atherosclerosis and vascular cognitive decline: a new understanding of the keys to symptomology.

scientific article published on August 2010

A theoretical framework for performance characterization of elastography: the strain filter

scientific article published on 01 January 1997

Absolute backscatter coefficient estimates of tissue-mimicking phantoms in the 5-50 MHz frequency range

scientific article

Acoustic backscatter and effective scatterer size estimates using a 2D CMUT transducer

scientific article

Adaptive spectral strain estimators for elastography

scientific article published in July 2004

Alterations in Ultrasound Scattering Following Thermal Ablation in ex vivo Bovine Liver

scientific article

An analysis of elastographic contrast-to-noise ratio

scientific article published in July 1998

An approach to unbiased subsample interpolation for motion tracking.

scientific article

An optimized index of human cardiovascular adaptation to simulated weightlessness.

scientific article published on May 1996

Analysis of 2-d ultrasound cardiac strain imaging using joint probability density functions

scientific article

Analysis of shear strain imaging for classifying breast masses: Finite element and phantom results ⬇️

scientific article published on November 1, 2011

Anthropomorphic breast phantoms for testing elastography systems

scientific article

Attenuation estimation using spectral cross-correlation.

scientific article published in March 2007

Axial-shear strain imaging for differentiating benign and malignant breast masses

scientific article

Bayesian regularization applied to ultrasound strain imaging

scientific article

C-plane Reconstructions from Sheaf Acquisition for Ultrasound Electrode Vibration Elastography

scientific article

Carotid Plaque Strain Indices Were Correlated With Cognitive Performance in a Cohort With Advanced Atherosclerosis, and Traditional Doppler Measures Showed no Association

scientific article published on 12 May 2020

Carotid atherosclerotic plaque instability and cognition determined by ultrasound-measured plaque strain in asymptomatic patients with significant stenosis

scientific article

Characterization of elastographic noise using the envelope of echo signals

scientific article published in May 1998

Characterization of tissue microstructure scatterer distribution with spectral correlation

scientific article published on 01 July 1993

Characterizing the compression-dependent viscoelastic properties of human hepatic pathologies using dynamic compression testing

scientific article

Classification of Symptomatic and Asymptomatic Patients with and without Cognitive Decline Using Non-invasive Carotid Plaque Strain Indices as Biomarkers.

scientific article published on 5 January 2016

Coherence of Ultrasound Radiofrequency Echoes from the Liver Estimated Using Multi-Taper Calculation

scientific article

Comparison of Displacement Tracking Algorithms for in Vivo Electrode Displacement Elastography

scientific article published on 11 October 2018

Comparison of cardiac displacement and strain imaging using ultrasound radiofrequency and envelope signals.

scientific article

Comparison of three dimensional strain volume reconstructions using SOUPR and wobbler based acquisitions: A phantom study

scientific article

Compression-dependent viscoelastic behavior of human cervix tissue

scientific article

Contrast-transfer improvement for electrode displacement elastography

scientific article published on 27 November 2006

Correction for simultaneous catheter eccentricity and tilt in intravascular elastography

scientific article published on 01 October 2003

Correlation analysis for angular compounding in strain imaging.

scientific article published on September 2007

Correlation analysis of three-dimensional strain imaging using ultrasound two-dimensional array transducers

scientific article published in September 2008

Correlation of RF signals during angular compounding

scientific article

Correlation of cognitive function with ultrasound strain indices in carotid plaque

scientific article

Correlation of ultrasonic scatterer size estimates for the statistical analysis and optimization of angular compounding

scientific article published in September 2004

Deep Learning for Carotid Plaque Segmentation using a Dilated U-Net Architecture

scientific article published on 01 July 2020

Delineation of Post-Procedure Ablation Regions with Electrode Displacement Elastography with a Comparison to Acoustic Radiation Force Impulse Imaging

scientific article published on 05 June 2017

Dictionary Representations for Electrode Displacement Elastography

article

Direct strain estimation in elastography using spectral cross-correlation

scientific article published on 01 November 2000

Displacement and strain estimation for evaluation of arterial wall stiffness using a familial hypercholesterolemia swine model of atherosclerosis

scientific article

Dynamic and quasi-static mechanical testing for characterization of the viscoelastic properties of human uterine tissue.

scientific article

Dynamic frame selection for in vivo ultrasound temperature estimation during radiofrequency ablation

scientific article

Efficient 3-D Reconstruction in Ultrasound Elastography via a Sparse Iteration Based on Markov Random Fields

scientific article published on 29 November 2016

Elastographic axial resolution criteria: an experimental study

scientific article published on 01 January 2000

Elastographic dynamic range expansion using variable applied strains

scientific article published in April 1997

Elastographic imaging

scientific article published on 01 May 2000

Elastographic imaging of thermal lesions in liver in-vivo using diaphragmatic stimuli

scientific article published in January 2004

Elastographic imaging of thermal lesions in the liver in vivo following radiofrequency ablation: preliminary results

scientific article published in November 2002

Elastographic imaging using a handheld compressor

scientific article published on 01 January 2002

Elastographic measurement of the area and volume of thermal lesions resulting from radiofrequency ablation: pathologic correlation.

scientific article published in September 2003

Elastographic measurements of in-vivo radiofrequency ablation lesions of the kidney

scientific article published in November 2006

Elastographic versus x-ray CT imaging of radio frequency ablation coagulations: an in vitro study

scientific article published in June 2004

Elastography: Imaging the elastic properties of soft tissues with ultrasound.

scientific article

Enhancement of echo-signal correlation in elastography using temporal stretching

scientific article published on 01 January 1997

Estimating tissue strain from signal decorrelation using the correlation coefficient

scientific article published on 01 January 1996

Estimation of displacement vectors and strain tensors in elastography using angular insonifications

scientific article

Estimation of the optimal maximum beam angle and angular increment for normal and shear strain estimation

scientific article published on 26 September 2008

Estimation of ultrasound attenuation from broadband echo-signals using bandpass filtering

scientific article published in May 2008

Estimation of ultrasound strain indices in carotid plaque and correlation to cognitive dysfunction.

scientific article

Evaluation of acoustic wave propagation velocities in the ocular lens and vitreous tissues of pigs, dogs, and rabbits

scientific article published on 01 February 2006

Evaluation of the impact of backscatter intensity variations on ultrasound attenuation estimation.

scientific article

Experimental corroboration of the nonstationary strain estimation errors in elastography

scientific article published on 01 December 2001

Exvivo ultrasound attenuation coefficient for human cervical and uterine tissue from 5 to 10 MHz

scientific article

Finite element analysis of tissue deformation with a radiofrequency ablation electrode for strain imaging

scientific article published in February 2007

GPU Accelerated Multilevel Lagrangian Carotid Strain Imaging

scientific article published on 28 May 2018

Hierarchical Motion Estimation With Bayesian Regularization in Cardiac Elastography: Simulation and In Vivo Validation

scientific article published on 12 July 2019

Histopathologic Validation of Grayscale Carotid Plaque Characteristics Related to Plaque Vulnerability.

scientific article published on 05 October 2016

Hybrid spectral domain method for attenuation slope estimation

scientific article published on 14 July 2008

Impact of gas bubbles generated during interstitial ablation on elastographic depiction of in vitro thermal lesions

scientific article published in April 2004

Impaired cognitive function in patients with atherosclerotic carotid stenosis and correlation with ultrasound strain measurements

scientific article

Improved Correlation of Strain Indices with Cognitive Dysfunction with Inclusion of Adventitial Layer with Carotid Plaque

scientific article

Improved parametric imaging of scatterer size estimates using angular compounding.

scientific article published in June 2004

Improvement of elastographic displacement estimation using a two-step cross-correlation method

scientific article

Improvements in elastographic contrast-to-noise ratio using spatial-angular compounding

scientific article

Improving thermal ablation delineation with electrode vibration elastography using a bidirectional wave propagation assumption.

scientific article

In Vivo Classification of Breast Masses Using Features Derived From Axial-Strain and Axial-Shear Images ⬇️

scientific article published on October 1, 2012

In vitro uterine strain imaging: preliminary results

scientific article published on July 2007

In vivo carotid strain imaging using principal strains in longitudinal view

scientific article published on 17 April 2019

Initial clinical experience imaging scatterer size and strain in thyroid nodules.

scientific article published in August 2006

Interstitial diffuse optical probe with spectral fitting to measure dynamic tumor hypoxia

scientific article published on 31 January 2020

Investigation of temperature-dependent viscoelastic properties of thermal lesions in ex vivo animal liver tissue

scientific article

Lagrangian carotid strain imaging indices normalized to blood pressure for vulnerable plaque

scientific article published on 05 June 2019

Lagrangian displacement tracking using a polar grid between endocardial and epicardial contours for cardiac strain imaging

scientific article published on April 2012

Locally optimized correlation-guided Bayesian adaptive regularization for ultrasound strain imaging

scientific article published on 19 March 2020

Lower Bound on Estimation Variance of the Ultrasonic Attenuation Coefficient Using the Spectral-Difference Reference-phantom Method

scientific article published on 20 October 2016

Mean scatterer spacing estimation in normal and thermally coagulated ex vivo bovine liver

scientific article

Mean scatterer spacing estimation using multi-taper coherence

scientific article

Mean-scatterer spacing estimates with spectral correlation

scientific article published on 01 December 1994

Measurement of tendon strain during muscle twitch contractions using ultrasound elastography.

scientific article

Methods for robust in vivo strain estimation in the carotid artery.

scientific article

Monitoring Microwave Ablation of Ex Vivo Bovine Liver Using Ultrasonic Attenuation Imaging

scientific article published on 25 April 2017

Monitoring stiffness changes in lesions after radiofrequency ablation at different temperatures and durations of ablation

scientific article published on 01 March 2005

Multilevel hybrid 2D strain imaging algorithm for ultrasound sector/phased arrays.

scientific article published on June 2009

Multiresolution imaging in elastography

scientific article published on 01 January 1998

Noise analysis and improvement of displacement vector estimation from angular displacements

scientific article

Noise reduction in elastograms using temporal stretching with multicompression averaging

scientific article published in January 1996

Noise reduction using spatial-angular compounding for elastography

scientific article published in May 2004

Non-invasive ultrasound-based temperature imaging for monitoring radiofrequency heating-phantom results

scientific article published on 30 July 2007

Nonlinear stress-strain relationships in tissue and their effect on the contrast-to-noise ratio in elastograms

scientific article published on 01 June 2000

Normal and shear strain estimation using beam steering on linear-array transducers

scientific article

Normal and shear strain imaging using 2D deformation tracking on beam steered linear array datasets.

scientific article

Optimum Diffraction-Corrected Frequency-Shift Estimator of the Ultrasonic Attenuation Coefficient.

scientific article published on 4 March 2016

Performance evaluation of the spectral centroid downshift method for attenuation estimation.

scientific article

Performance optimization in elastography: multicompression with temporal stretching

scientific article published on 01 July 1996

Phase aberration effects in elastography

scientific article published on 01 June 2001

Piecewise Linear Slope Estimation

scientific article

Post-Procedure Evaluation of Microwave Ablations of Hepatocellular Carcinomas Using Electrode Displacement Elastography

scientific article

Power spectral strain estimators in elastography

scientific article published on 01 September 1999

Preliminary in vivo atherosclerotic carotid plaque characterization using the accumulated axial strain and relative lateral shift strain indices

scientific article

Principal component analysis of shear strain effects

scientific article published on 01 January 2009

Quantification of carotid artery plaque stability with multiple region of interest based ultrasound strain indices and relationship with cognition

scientific article published on 08 June 2017

Quantifying local stiffness variations in radiofrequency ablations with dynamic indentation

scientific article

Quasi-Static Ultrasound Elastography

scientific article

Radio-frequency ablation electrode displacement elastography: a phantom study

scientific article

Radiofrequency electrode vibration-induced shear wave imaging for tissue modulus estimation: a simulation study

scientific article

Real-Time in Vivo Photoacoustic Imaging in the Assessment of Myocardial Dynamics in Murine Model of Myocardial Ischemia

scientific article published on 29 July 2018

Real-time calibration of temperature estimates during radiofrequency ablation

scientific article published in July 2004

Relationship between ultrasonic attenuation, size and axial strain parameters for ex vivo atherosclerotic carotid plaque

scientific article

Relative Elastic Modulus Imaging Using Sector Ultrasound Data for Abdominal Applications: An Evaluation of Strategies and Feasibility

scientific article

Scatterer number density considerations in reference phantom-based attenuation estimation

scientific article

Segmental Analysis of Cardiac Short-Axis Views Using Lagrangian Radial and Circumferential Strain

scientific article published on 16 November 2015

Semiautomated thermal lesion segmentation for three-dimensional elastographic imaging.

scientific article

Shear strain imaging using shear deformations.

scientific article

Shear wave velocity imaging using transient electrode perturbation: phantom and ex vivo validation

scientific article

Signal to noise ratio comparisons for ultrasound attenuation slope estimation algorithms

scientific article

Simulation of ultrasound two-dimensional array transducers using a frequency domain model

scientific article published in July 2008

Spatial-angular compounding for elastography using beam steering on linear array transducers

scientific article

Spectral and scatterer-size correlation during angular compounding: simulations and experimental studies

scientific article published in October 2006

Spectral correlation in ultrasonic pulse echo signal processing.

scientific article published in January 1993

Spectral estimators in elastography

scientific article published on 01 March 2000

Spherical lesion phantoms for testing the performance of elastography systems

scientific article

Stability of heterogeneous elastography phantoms made from oil dispersions in aqueous gels

scientific article published on February 2006

Statistics of ultrasonic scatterer size estimation with a reference phantom

scientific article published in June 2003

Stochastic piecewise linear function fitting with application to ultrasound shear wave imaging

scientific article

Temperature dependence of ultrasonic propagation speed and attenuation in canine tissue

scientific article published in October 2002

Temperature dependence of ultrasonic propagation speed and attenuation in excised canine liver tissue measured using transmitted and reflected pulses

scientific article published on 01 June 2004

The Preservation of Cognition 1 Year After Carotid Endarterectomy in Patients With Prior Cognitive Decline

scientific article published in June 2017

The Ultrasonix 500RP: a commercial ultrasound research interface.

scientific article

The nonstationary strain filter in elastography: Part I. Frequency dependent attenuation ⬇️

scientific article published on January 1, 1997

The nonstationary strain filter in elastography: Part II. Lateral and elevational decorrelation

scientific article published in January 1997

The relationship between carotid artery plaque stability and white matter ischemic injury

scientific article

Theoretical and phantom based investigation of the impact of sound speed and backscatter variations on attenuation slope estimation.

scientific article published on 23 March 2011

Theoretical bounds on the estimation of transverse displacement, transverse strain and Poisson's ratio in elastography

scientific article published in July 2000

Three dimensional shear wave elastographic reconstruction of ablations

scientific article

Three-dimensional canine heart model for cardiac elastography

scientific article

Three-dimensional sheaf of ultrasound planes reconstruction (SOUPR) of ablated volumes

scientific article

Tissue mimicking materials for the detection of prostate cancer using shear wave elastography: a validation study

scientific article

Tissue-mimicking agar/gelatin materials for use in heterogeneous elastography phantoms

scientific article

Tissue-mimicking oil-in-gelatin dispersions for use in heterogeneous elastography phantoms

scientific article published in January 2003

Tradeoffs in elastographic imaging

scientific article published on 01 October 2001

Transcranial Doppler and Microemboli Detection: Relationships to Symptomatic Status and Histopathology Findings.

scientific article

Transrectal quantitative shear wave elastography in the detection and characterisation of prostate cancer

scientific article published on 23 March 2013

Two-dimensional multi-level strain estimation for discontinuous tissue

scientific article published on 29 December 2006

Ultrasonic attenuation estimation in small plaque samples using a power difference method

scientific article published in January 2007

Ultrasonic imaging of myocardial strain using cardiac elastography

scientific article published on 01 January 2003

Ultrasonic noninvasive temperature estimation using echoshift gradient maps: simulation results

scientific article published on 01 July 2005

Ultrasonic tracking of shear waves using a particle filter

scientific article

Ultrasound attenuation imaging using compound acquisition and processing.

scientific article published in October 2003

Ultrasound frame rate requirements for cardiac elastography: experimental and in vivo results

scientific article published on 20 June 2008

Ultrasound monitoring of temperature change during radiofrequency ablation: preliminary in-vivo results.

scientific article published in March 2002

Ultrasound simulation of real-time temperature estimation during radiofrequency ablation using finite element models.

scientific article

Viscoelastic characterization of in vitro canine tissue

scientific article published on September 2004

Visualizing ex vivo radiofrequency and microwave ablation zones using electrode vibration elastography

scientific article

Wavelet denoising of displacement estimates in elastography

scientific article published in April 2004

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