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Tomy Varghese

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TOP 3
Shi Hairong; Varghese Tomy; Mitchell Carol C; McCormick Matthew; Dempsey Robert J; Kliewer Mark A
In vivo attenuation and equivalent scatterer size parameters for atherosclerotic carotid plaque: preliminary results.
Jiang Jingfeng; Varghese Tomy; Brace Christopher L; Madsen Ernest L; Hall Timothy J; Bharat Shyam; Hobson Maritza A; Zagzebski James A; Lee Fred T
Young's modulus reconstruction for radio-frequency ablation electrode-induced displacement fields: a feasibility study.
Chen Hao; Varghese Tomy
Multilevel hybrid 2D strain imaging algorithm for ultrasound sector/phased arrays.

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All Publications

2009: Shi Hairong; Varghese Tomy; Mitchell Carol C; McCormick Matthew; Dempsey Robert J; Kliewer Mark A
In vivo attenuation and equivalent scatterer size parameters for atherosclerotic carotid plaque: preliminary results.
Ultrasonics 2009;49(8):779-85.
2009: Jiang Jingfeng; Varghese Tomy; Brace Christopher L; Madsen Ernest L; Hall Timothy J; Bharat Shyam; Hobson Maritza A; Zagzebski James A; Lee Fred T
Young's modulus reconstruction for radio-frequency ablation electrode-induced displacement fields: a feasibility study.
IEEE transactions on medical imaging 2009;28(8):1325-34.
2009: Chen Hao; Varghese Tomy
Multilevel hybrid 2D strain imaging algorithm for ultrasound sector/phased arrays.
Medical physics 2009;36(6):2098-106.
2009: Kiss Miklos Z; Daniels Matthew J; Varghese Tomy
Investigation of temperature-dependent viscoelastic properties of thermal lesions in ex vivo animal liver tissue.
Journal of biomechanics 2009;42(8):959-66.
2009: Chen Hao; Varghese Tomy
Principal component analysis of shear strain effects.
Ultrasonics 2009;49(4-5):472-83.
2009: Rao Min; Varghese Tomy
Estimation of the optimal maximum beam angle and angular increment for normal and shear strain estimation.
IEEE transactions on bio-medical engineering 2009;56(3):760-9.
2009: Farron Joe; Varghese Tomy; Thelen Darryl G
Measurement of tendon strain during muscle twitch contractions using ultrasound elastography.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2009;56(1):27-35.
2008: Shi Hairong; Mitchell Carol C; McCormick Matthew; Kliewer Mark A; Dempsey Robert J; Varghese Tomy
Preliminary in vivo atherosclerotic carotid plaque characterization using the accumulated axial strain and relative lateral shift strain indices.
Physics in medicine and biology 2008;53(22):6377-94.
2008: Kim Hyungsuk; Varghese Tomy
Hybrid spectral domain method for attenuation slope estimation.
Ultrasound in medicine & biology 2008;34(11):1808-19.
2008: Hobson Maritza A; Madsen Ernest L; Frank Gary R; Jiang Jingfeng; Shi Hairong; Hall Timothy J; Varghese Tomy
Anthropomorphic phantoms for assessment of strain imaging methods involving saline-infused sonohysterography.
Ultrasound in medicine & biology 2008;34(10):1622-37.
2008: Shi Hairong; Varghese Tomy; Dempsey Robert J; Salamat Mohammed S; Zagzebski James A
Relationship between ultrasonic attenuation, size and axial strain parameters for ex vivo atherosclerotic carotid plaque.
Ultrasound in medicine & biology 2008;34(10):1666-77.
2008: Rao Min; Varghese Tomy
Correlation analysis of three-dimensional strain imaging using ultrasound two-dimensional array transducers.
The Journal of the Acoustical Society of America 2008;124(3):1858-65.
2008: Liu W; Zagzebski J A; Hall T J; Madsen E L; Varghese T; Kliewer M A; Panda S; Lowery C; Barnes S
Acoustic backscatter and effective scatterer size estimates using a 2D CMUT transducer.
Physics in medicine and biology 2008;53(15):4169-83.
2008: Bharat Shyam; Fisher Ted G; Varghese Tomy; Hall Timothy J; Jiang Jingfeng; Madsen Ernest L; Zagzebski James A; Lee Fred T
Three-dimensional electrode displacement elastography using the Siemens C7F2 fourSight four-dimensional ultrasound transducer.
Ultrasound in medicine & biology 2008;34(8):1307-16.
2008: Rao Min; Varghese Tomy; Zagzebski James A
Simulation of ultrasound two-dimensional array transducers using a frequency domain model.
Medical physics 2008;35(7):3162-9.
2008: Bharat Shyam; Varghese Tomy; Madsen Ernest L; Zagzebski James A
Radio-frequency ablation electrode displacement elastography: a phantom study.
Medical physics 2008;35(6):2432-42.
2008: Chen Hao; Varghese Tomy
Noise analysis and improvement of displacement vector estimation from angular displacements.
Medical physics 2008;35(5):2007-17.
2008: Daniels M J; Jiang J; Varghese T
Ultrasound simulation of real-time temperature estimation during radiofrequency ablation using finite element models.
Ultrasonics 2008;48(1):40-55.
2008: Rao Min; Varghese Tomy; Madsen Ernest L
Shear strain imaging using shear deformations.
Medical physics 2008;35(2):412-23.
2007: Rao Min; Varghese Tomy
Correlation analysis for angular compounding in strain imaging.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2007;54(9):1903-7.
2007: Daniels M J; Varghese T; Madsen E L; Zagzebski J A
Non-invasive ultrasound-based temperature imaging for monitoring radiofrequency heating-phantom results.
Physics in medicine and biology 2007;52(16):4827-43.
2007: Hobson Maritza A; Kiss Miklos Z; Varghese Tomy; Sommer Amy M; Kliewer Mark A; Zagzebski James A; Hall Timothy J; Harter Josephine; Hartenbach Ellen M; Madsen Ernest L
In vitro uterine strain imaging: preliminary results.
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2007;26(7):899-908.
2007: Kim Hyungsuk; Varghese Tomy
Attenuation estimation using spectral cross-correlation.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2007;54(3):510-9.
2007: Jiang Jingfeng; Varghese Tomy; Chen Quan; Hall Timothy J; Zagzebski James A
Finite element analysis of tissue deformation with a radiofrequency ablation electrode for strain imaging.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2007;54(2):281-9.
2007: Shi Hairong; Tu Haifeng; Dempsey R J; Varghese Tomy
Ultrasonic attenuation estimation in small plaque samples using a power difference method.
Ultrasonic imaging 2007;29(1):15-30.
2007: Shi Hairong; Varghese Tomy
Two-dimensional multi-level strain estimation for discontinuous tissue.
Physics in medicine and biology 2007;52(2):389-401.
2007: Rao M; Chen Q; Shi H; Varghese T; Madsen E L; Zagzebski J A; Wilson T A
Normal and shear strain estimation using beam steering on linear-array transducers.
Ultrasound in medicine & biology 2007;33(1):57-66.
2007: Chen Hao; Shi Hairong; Varghese Tomy
Improvement of elastographic displacement estimation using a two-step cross-correlation method.
Ultrasound in medicine & biology 2007;33(1):48-56.
2006: Bharat Shyam; Varghese Tomy
Contrast-transfer improvement for electrode displacement elastography.
Physics in medicine and biology 2006;51(24):6403-18.
2006: Pareek Gyan; Wilkinson Eric R; Bharat Shyam; Varghese Tomy; Laeseke Paul F; Lee Fred T; Warner Thomas F; Zagzebski James A; Nakada Stephen Y
Elastographic measurements of in-vivo radiofrequency ablation lesions of the kidney.
Journal of endourology / Endourological Society 2006;20(11):959-64.
2006: Liu W; Zagzebski J A; Varghese T; Gerig A L; Hall T J
Spectral and scatterer-size correlation during angular compounding: simulations and experimental studies.
Ultrasonic imaging 2006;28(4):230-44.
2006: Wilson Thaddeus; Zagzebski James; Varghese Tomy; Chen Quan; Rao Min
The Ultrasonix 500RP: a commercial ultrasound research interface.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2006;53(10):1772-82.
2006: Wilson Thaddeus; Chen Quan; Zagzebski James A; Varghese Tomy; VanMiddlesworth Lester
Initial clinical experience imaging scatterer size and strain in thyroid nodules.
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2006;25(8):1021-9.
2006: Kiss Miklos Z; Hobson Maritza A; Varghese Tomy; Harter Josephine; Kliewer Mark A; Hartenbach Ellen M; Zagzebski James A
Frequency-dependent complex modulus of the uterus: preliminary results.
Physics in medicine and biology 2006;51(15):3683-95.
2006: Rao Min; Varghese Tomy
Correlation analysis of the beam angle dependence for elastography.
The Journal of the Acoustical Society of America 2006;119(6):4093-101.
2006: Madsen Ernest L; Hobson Maritza A; Frank Gary R; Shi Hairong; Jiang Jingfeng; Hall Timothy J; Varghese Tomy; Doyley Marvin M; Weaver John B
Anthropomorphic breast phantoms for testing elastography systems.
Ultrasound in medicine & biology 2006;32(6):857-74.
2006: Rao Min; Chen Quan; Shi Hairong; Varghese Tomy
Spatial-angular compounding for elastography using beam steering on linear array transducers.
Medical physics 2006;33(3):618-26.
2006: Liu Wu; Zagzebski James A; Varghese Tomy; Dyer Charles R; Techavipoo Udomchai; Hall Timothy J
Segmentation of elastographic images using a coarse-to-fine active contour model.
Ultrasound in medicine & biology 2006;32(3):397-408.
2006: Madsen Ernest L; Hobson Maritza A; Shi Hairong; Varghese Tomy; Frank Gary R
Stability of heterogeneous elastography phantoms made from oil dispersions in aqueous gels.
Ultrasound in medicine & biology 2006;32(2):261-70.
2006: Görig Christiane; Varghese Tomy; Stiles Timothy; van den Broek Jan; Zagzebski James A; Murphy Christopher J
Evaluation of acoustic wave propagation velocities in the ocular lens and vitreous tissues of pigs, dogs, and rabbits.
American journal of veterinary research 2006;67(2):288-95.
2005: Madsen Ernest L; Frank Gary R; Hobson Maritza A; Shi Hairong; Jiang Jingfeng; Varghese Tomy; Hall Timothy J
Spherical lesion phantoms for testing the performance of elastography systems.
Physics in medicine and biology 2005;50(24):5983-95.
2005: Madsen Ernest L; Hobson Maritza A; Shi Hairong; Varghese Tomy; Frank Gary R
Tissue-mimicking agar/gelatin materials for use in heterogeneous elastography phantoms.
Physics in medicine and biology 2005;50(23):5597-618.
2005: Shi Hairong; Chen Quan; Varghese Tomy
A general solution for catheter position effects for strain estimation in intravascular elastography.
Ultrasound in medicine & biology 2005;31(11):1509-26.
2005: Rao Min; Varghese Tomy
Spatial angular compounding for elastography without the incompressibility assumption.
Ultrasonic imaging 2005;27(4):256-70.
2005: Techavipoo Udomchai; Chen Quan; Varghese Tomy
Ultrasonic noninvasive temperature estimation using echoshift gradient maps: simulation results.
Ultrasonic imaging 2005;27(3):166-80.
2005: Chen Quan; Gerig Anthony L; Techavipoo Udomchai; Zagzebski James A; Varghese Tomy
Correlation of RF signals during angular compounding.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2005;52(6):961-70.
2005: Techavipoo Udomchai; Varghese Tomy
Improvements in elastographic contrast-to-noise ratio using spatial-angular compounding.
Ultrasound in medicine & biology 2005;31(4):529-36.
2005: Bharat Shyam; Techavipoo Udomchai; Kiss Miklos Z; Liu Wu; Varghese Tomy
Monitoring stiffness changes in lesions after radiofrequency ablation at different temperatures and durations of ablation.
Ultrasound in medicine & biology 2005;31(3):415-22.
2004: Techavipoo U; Chen Q; Varghese T; Zagzebski J A
Estimation of displacement vectors and strain tensors in elastography using angular insonifications.
IEEE transactions on medical imaging 2004;23(12):1479-89.
2004: Kiss Miklos Z; Varghese Tomy; Hall Timothy J
Viscoelastic characterization of in vitro canine tissue.
Physics in medicine and biology 2004;49(18):4207-18.
2004: Gerig Anthony; Chen Quan; Zagzebski James; Varghese Tomy
Correlation of ultrasonic scatterer size estimates for the statistical analysis and optimization of angular compounding.
The Journal of the Acoustical Society of America 2004;116(3):1832-41.
2004: Varghese T; Daniels M J
Real-time calibration of temperature estimates during radiofrequency ablation.
Ultrasonic imaging 2004;26(3):185-200.
2004: Alam S Kaisar; Lizzi Frederic L; Varghese Tomy; Feleppa Ernest J; Ramachandran Sarayu
Adaptive spectral strain estimators for elastography.
Ultrasonic imaging 2004;26(3):131-49.
2004: Liu Wu; Techavipoo Udomchai; Varghese Tomy; Zagzebski James A; Chen Quan; Lee Fred T
Elastographic versus x-ray CT imaging of radio frequency ablation coagulations: an in vitro study.
Medical physics 2004;31(6):1322-32.
2004: Gerig Anthony L; Varghese Tomy; Zagzebski James A
Improved parametric imaging of scatterer size estimates using angular compounding.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2004;51(6):708-15.
2004: Techavipoo U; Varghese T; Chen Q; Stiles T A; Zagzebski J A; Frank G R
Temperature dependence of ultrasonic propagation speed and attenuation in excised canine liver tissue measured using transmitted and reflected pulses.
The Journal of the Acoustical Society of America 2004;115(6):2859-65.
2004: Techavipoo Udomchai; Chen Quan; Varghese Tomy; Zagzebski James A; Madsen Ernest L
Noise reduction using spatial-angular compounding for elastography.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2004;51(5):510-20.
2004: Techavipoo U; Varghese T; Zagzebski J A; Chen Q; Liu W
Semiautomated thermal lesion segmentation for three-dimensional elastographic imaging.
Ultrasound in medicine & biology 2004;30(5):655-64.
2004: Techavipoo Udomchai; Varghese Tomy
Wavelet denoising of displacement estimates in elastography.
Ultrasound in medicine & biology 2004;30(4):477-91.
2004: Varghese Tomy; Techavipoo Udomchai; Zagzebski James A; Lee Fred T
Impact of gas bubbles generated during interstitial ablation on elastographic depiction of in vitro thermal lesions.
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2004;23(4):535-44; quiz 545-6.
2004: Varghese Tomy; Shi Hairong
Elastographic imaging of thermal lesions in liver in-vivo using diaphragmatic stimuli.
Ultrasonic imaging 2004;26(1):18-28.
2003: Shi H; Varghese T; Chen Q; Gimelli G
Correction for simultaneous catheter eccentricity and tilt in intravascular elastography.
Ultrasonic imaging 2003;25(4):262-83.
2003: Tu Haifeng; Varghese Tomy; Madsen Ernest L; Chen Quan; Zagzebski James A
Ultrasound attenuation imaging using compound acquisition and processing.
Ultrasonic imaging 2003;25(4):245-61.
2003: Varghese Tomy; Techavipoo Udomchai; Liu Wu; Zagzebski James A; Chen Quan; Frank Gary; Lee Fred T
Elastographic measurement of the area and volume of thermal lesions resulting from radiofrequency ablation: pathologic correlation.
AJR. American journal of roentgenology 2003;181(3):701-7.
2003: Gerig Anthony; Zagzebski James; Varghese Tomy
Statistics of ultrasonic scatterer size estimation with a reference phantom.
The Journal of the Acoustical Society of America 2003;113(6):3430-7.
2003: Madsen E L; Frank G R; Krouskop T A; Varghese T; Kallel F; Ophir J
Tissue-mimicking oil-in-gelatin dispersions for use in heterogeneous elastography phantoms.
Ultrasonic imaging 2003;25(1):17-38.
2003: Varghese Tomy; Zagzebski J A; Rahko P; Breburda C S
Ultrasonic imaging of myocardial strain using cardiac elastography.
Ultrasonic imaging 2003;25(1):1-16.
2002: Varghese T; Zagzebski J A; Lee F T
Elastographic imaging of thermal lesions in the liver in vivo following radiofrequency ablation: preliminary results.
Ultrasound in medicine & biology 2002;28(11-12):1467-73.
2002: Techavipoo U; Varghese T; Zagzebski J A; Stiles T; Frank G
Temperature dependence of ultrasonic propagation speed and attenuation in canine tissue.
Ultrasonic imaging 2002;24(4):246-60.
2002: Varghese T; Zagzebski J A; Chen Q; Techavipoo U; Frank G; Johnson C; Wright A; Lee F T
Ultrasound monitoring of temperature change during radiofrequency ablation: preliminary in-vivo results.
Ultrasound in medicine & biology 2002;28(3):321-9.
2002: Varghese T; Zagzebski J A; Frank G; Madsen E L
Elastographic imaging using a handheld compressor.
Ultrasonic imaging 2002;24(1):25-35.
2001: Varghese T; Ophir J
Experimental corroboration of the nonstationary strain estimation errors in elastography.
Ultrasound in medicine & biology 2001;27(12):1677-82.
2001: Varghese T; Ophir J; Konofagou E; Kallel F; Righetti R
Tradeoffs in elastographic imaging.
Ultrasonic imaging 2001;23(4):216-48.
2001: Varghese T; Bilgen M; Ophir J
Phase aberration effects in elastography.
Ultrasound in medicine & biology 2001;27(6):819-27.
2000: Varghese T; Konofagou E E; Ophir J; Alam S K; Bilgen M
Direct strain estimation in elastography using spectral cross-correlation.
Ultrasound in medicine & biology 2000;26(9):1525-37.
2000: Konofagou E E; Varghese T; Ophir J
Theoretical bounds on the estimation of transverse displacement, transverse strain and Poisson's ratio in elastography.
Ultrasonic imaging 2000;22(3):153-77.
2000: Varghese T; Ophir J; Krouskop T A
Nonlinear stress-strain relationships in tissue and their effect on the contrast-to-noise ratio in elastograms.
Ultrasound in medicine & biology 2000;26(5):839-51.
2000: Ophir J; Garra B; Kallel F; Konofagou E; Krouskop T; Righetti R; Varghese T
Elastographic imaging.
Ultrasound in medicine & biology 2000;26 Suppl 1():S23-9.
2000: Alam S K; Ophir J; Varghese T
Elastographic axial resolution criteria: an experimental study.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2000;47(1):304-9.
1999: Konofagou E E; Varghese T; Ophir J; Alam S K
Power spectral strain estimators in elastography.
Ultrasound in medicine & biology 1999;25(7):1115-29.
1999: Varghese T; Ophir J
A method for experimental characterization of the noise performance of elastographic systems.
Ultrasonic imaging 1999;21(1):17-30.
1999: Ophir J; Alam S K; Garra B; Kallel F; Konofagou E; Krouskop T; Varghese T
Elastography: ultrasonic estimation and imaging of the elastic properties of tissues.
Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine 1999;213(3):203-33.
1998: Varghese T; Ophir J
An analysis of elastographic contrast-to-noise ratio.
Ultrasound in medicine & biology 1998;24(6):915-24.
1998: Varghese T; Ophir J
Characterization of elastographic noise using the envelope of echo signals.
Ultrasound in medicine & biology 1998;24(4):543-55.
1998: Alam S K; Ophir J; Cespedes I; Varghese T
A deconvolution filter for improvement of time-delay estimation in elastography.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 1998;45(6):1565-72.
1997: Konofagou E E; Ophir J; Kallel F; Varghese T
Elastographic dynamic range expansion using variable applied strains.
Ultrasonic imaging 1997;19(2):145-66.
1997: Kallel F; Varghese T; Ophir J; Bilgen M
The nonstationary strain filter in elastography: Part II. Lateral and elevational decorrelation.
Ultrasound in medicine & biology 1997;23(9):1357-69.
1997: Varghese T; Ophir J
The nonstationary strain filter in elastography: Part I. Frequency dependent attenuation.
Ultrasound in medicine & biology 1997;23(9):1343-56.
1996: Varghese T; Ophir J
Performance optimization in elastography: multicompression with temporal stretching.
Ultrasonic imaging 1996;18(3):193-214.
1996: Varghese T; Ophir J
Estimating tissue strain from signal decorrelation using the correlation coefficient.
Ultrasound in medicine & biology 1996;22(9):1249-54.
1996: Varghese T; Ophir J; Céspedes I
Noise reduction in elastograms using temporal stretching with multicompression averaging.
Ultrasound in medicine & biology 1996;22(8):1043-52.

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