Publications

© Tomy Varghese , Papers published during the years 1993-2015 You are granted permission for the non-commercial use, reproduction, distribution or display of these documents under the following restrictions. Appropriate credit is given as to its source and authorship. This permission is valid for a period of 45 (forty five) days from the time this document was obtained from this web-site. All other rights reserved by the author(s). It is understood that all individuals copying this information will adhere to the terms/constraints invoked by each author's copyright.

Publications

1993	1994	1995	1996	1997	1998	1999	2000	2001	2002
2003	2004	2005	2006	2007	2008	2009	2010	2011	2012
2013	2014	2015	2016	2017	2018	2019	2020	2021	2022

1993

K.D. Donohue. J. M. Bressler, Tomy Varghese, and N. M. Bilgutay, Spectral correlation in ultrasonic pulse-echo signal processing, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol.-40, pp. 330-337, 1993. Download/ View PDF Format (361 KB)
Tomy Varghese, and K. D. Donohue, Characterization of tissue microstructure scatterer distribution with spectral correlation, Ultrasound Imaging Vol.-15, pp. 238-254, 1993. Download/ View PDF Format ()

1994

Tomy Varghese, and K. D. Donohue, Mean scatterer spacing estimates with spectral correlation, Journal Acoustic Society America, Vol. 96, No. 6, pp. 3504-3515, 1994. Download/ View PDF Format (934 KB)

1995

Tomy Varghese, and K. D. Donohue, Estimating mean scatterer spacing with the frequency-smoothed spectral autocorrelation function, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 42, No. 3, pp. 451-463, 1995. Download/ View PDF Format (992 KB)

1996

M. Wang, L. G. Hassebrook, J. Evans, Tomy Varghese, and C. Knapp, An optimized index of human cardiovascular adaptation to simulated weightlessness, IEEE Transactions on Biomedical Engineering, Vol. 43, No. 5, pp. 502-511, 1996. Download/ View PDF Format (922)
Tomy Varghese, K. D. Donohue, V. L. Genis, and E. J. Halpern, Order selection criteria for detecting mean scatterer spacing with the AR model, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 43, No. 5, pp. 979-984, 1996. Download/ View PDF Format (565 KB)
Tomy Varghese, and Jonathan Ophir, Performance optimization in elastography: Multicompression with temporal stretching, Ultrasonic Imaging, Vol. 18, No. 3, pp. 193-214, 1996. Download/ View PDF Format (12,594 KB)
Tomy Varghese, J. Ophir, and E. I. Céspedes, Noise reduction in elastography using temporal stretching with multicompression averaging, Ultrasound in Medicine and Biology, Vol. 22, No. 8, pp. 1043-1052, 1996. Download/ View PDF Format (11,513 KB)
Tomy Varghese, and J. Ophir, Estimating tissue strain from signal decorrelation using the correlation coefficient, Ultrasound in Medicine and Biology, Vol. 22, No. 9, pp. 1249-1254, 1996. Download/ View PDF Format (6,241 KB)
J. Ophir, F. Kallel, Tomy Varghese, M. Bertrand, I. Céspedes and H. Ponnekanti, Elastography: A systems approach, Invited paper & Review, The International Journal of Imaging Systems and Technology, John Wiley & Sons, Inc, Vol. 8, pp. 89-103, 1996. Download/ View PDF Format (18173, KB)

1997

Tomy Varghese, and J. Ophir, A theoretical framework for performance characterization of elastography: The strain filter, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 44, No. 1, pp. 164-172, 1997. Download/ View PDF Format (510 KB)
Tomy Varghese, and J. Ophir, Enhancement of echo-signal correlation in elastography using temporal stretching, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 44, No. 1, pp. 173-180, 1997. Download/ View PDF Format (463 KB)
E. E. Konofagou, J. Ophir, F. Kallel, and Tomy Varghese, Elastographic dynamic range expansion using variable applied strains, Ultrasonic Imaging, Vol. 19, No. 1, pp. 145-166, 1997. Download/ View PDF Format (17,315 KB)
Tomy Varghese, and J. Ophir, The nonstationary strain filter in elastography, Part-I, Frequency dependent attenuation, Ultrasound in Medicine and Biology, Vol. 23, No. 9, pp. 1343-1356, 1997. Download/ View PDF Format (12,709 KB)
F. Kallel, Tomy Varghese, J. Ophir and M. Bilgen, The nonstationary strain filter in elastography, Part-II, Lateral and elevational decorrelation, Ultrasound in Medicine and Biology, Vol. 23, No. 9, pp. 1357-1369, 1997. Download/ View PDF Format (13,429 KB)
E. E. Konofagou, Tomy Varghese, and J. Ophir, Using variable compressions with a combined baseband method for dynamic range expansion of elastograms, Invited paper, Journal of Medical Ultrasonics, The Japan Soc. Ultrason. Med., Vol. 24, No. 5, pp. 753-760, 1997. Download/ View PDF Format (12,863 KB)

1998

Tomy Varghese, M. Bilgen, and J. Ophir, Multiresolution imaging in elastography, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 45, No. 1, pp. 65-75, 1998. Download/ View PDF Format (599 KB)
Tomy Varghese, and J. Ophir, Characterization of elastographic noise using the envelope of echo signals , Ultrasound in Medicine and Biology, Vol. 24, No. 4, pp. 543-555, 1998. Download/ View PDF Format (18,966 KB)
Tomy Varghese, and J. Ophir, An analysis of the elastographic contrast-to-noise ratio performance, Ultrasound in Medicine and Biology, Vol. 24, No. 6, pp. 915-924, 1998. Download/ View PDF Format (11,715 KB)
S. K. Alam, J. Ophir, E. I. Céspedes, and Tomy Varghese, A deconvolution filter for improvement of time-delay estimation in elastography, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 45, No. 6, pp. 1565-1572, 1998. Download/ View PDF Format (406 KB)

1999

Tomy Varghese, and J. Ophir, Method for the experimental characterization of the noise performance of elastographic systems, Ultrasonic Imaging, Vol. 21, No. 1, pp. 17-30, 1999. Download/ View PDF Format (39,584 KB)
E. E. Konofagou, Tomy Varghese, J. Ophir, and S. K. Alam Power spectral strain estimators in elastography, Ultrasound in Medicine and Biology, Vol. 25, No. 7, pp. 1115-1129, 1999. Download/ View PDF Format (783 KB)
J. Ophir, K. A. Alam, B. Garra, F. Kallel, E. E. Konofagou, T. A. Krouskop, and Tomy Varghese, Elastography: Ultrasonic estimation and imaging of the elastic properties of tissues, Invited paper & Review, Proceedings of the Institution of Mechanical engineers, Part H Journal of Engineering in Medicine, Vol. 213, pp. 203-233,1999. Download/ View PDF Format (41 MB)

2000

S. K. Alam, J. Ophir, and Tomy Varghese Elastographic axial resolution criteria: An experimental study, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 47, No. 1, pp. 304-309, 2000. Download/ View PDF Format (1938 KB)
E. E. Konofagou, Tomy Varghese, and J. Ophir, Spectral estimators in elastography, Ultrasonics, Vol. 38, No. 1-8, pp. 412-416, 2000. Download/ View PDF Format (283 KB)
E. E. Konofagou, Tomy Varghese, and J. Ophir, Fundamental Limits on the Estimation of Transverse Displacement, Transverse Strain and Poisson's Ratio in Elastography, Ultrasonic Imaging, Vol. 22, No. 3, pp. 153-177, 2000. Download/ View PDF Format (244 KB)
Tomy Varghese, J. Ophir, and T A. Krouskop Non-linear stress-strain relationships in tissue and their effect on the contrast-to-noise ratio in elastograms, Ultrasound in Medicine and Biology, Vol. 26, No. 5, pp. 839-851, 2000. Download/ View PDF Format (739 KB)
Tomy Varghese, J. Ophir, E. E. Konofagou, S. K. Alam and M. Bilgen Direct strain estimation in elastography using spectral cross-correlation, Ultrasound in Medicine and Biology, Vol. 26, No. 9, pp. 1525-1537, 2000. Download/ View PDF Format (459 KB)
J. Ophir, B. Garra, F. Kallel, E. E. Konofagou, T. A. Krouskop, R. Righetti and Tomy Varghese, Elastographic Imaging, Invited Paper, Ultrasound in Medicine and Biology, Vol. 26, Supplement 1, pp. S23-S29, 2000. Download/ View PDF Format (414 KB)

2001

Tomy Varghese, M. Bilgen, J. Ophir, Phase aberration effects in elastography, Ultrasound in Medicine and Biology, Vol. 27, No. 6, pp. 819-827, 2001. Download/ View PDF Format (328 KB)
Tomy Varghese, and J. Ophir, Experimental Corroboration of the Nonstationary Strain Estimation Errors, Ultrasound in Medicine and Biology, Vol. 27, No. 12, pp. 1677-1682, 2001. Download/ View PDF Format (115 KB)
Tomy Varghese, J. Ophir, E.E. Konofagou, F. Kallel and R. Righetti, Tradeoffs in Elastographic Imaging, Ultrasonic Imaging, Vol. 23, No. 4, pp. 216-248, 2001. Download/ View PDF Format (621 KB)
J. Ophir, F. Kallel, Tomy Varghese, E.E. Konofagou,S.K. Alam, T. A. Krouskop, B. Garra, and R. Righetti, Elastography, Invited Paper&Review, Journal of the French Academy of Sciences, Series IV, Tome. 2, pp. 1193-1212, 2001. Download/ View PDF Format (705)

2002

Tomy Varghese, J.A.Zagzebski, Q. Chen, U. Techavipoo, G. Frank, C. Johnson, A. Wright, and F.T. Lee Jr, Ultrasound Monitoring of Temperature Change During Radio-Frequency Ablation: Preliminary in-vivo Results, Ultrasound in Medicine and Biology, Vol. 28, No. 3, pp. 321-329, 2002. Download/ View PDF Format (2183 KB)
Tomy Varghese, J.A. Zagzebski, G. Frank and E.L. Madsen, Elastographic Imaging Using A Handheld Compressor, Ultrasonic Imaging, Vol. 24, No. 1, pp. 25-35, 2002. Download/ View PDF Format (415 KB)
Tomy Varghese, J.A.Zagzebski, and F.T. Lee Jr, Elastographic Imaging of thermal lesionsin the liver in-vivo following Radiofrequency Ablation: Preliminary Results, Ultrasound in Medicine and Biology, Vol. 28, No. 11/12, pp. 1467-1473, 2002. Download/ View PDF Format (316 KB)
U. Techavipoo, Tomy Varghese, J.A.Zagzebski, and T. Stiles and G. Frank, Temperature dependence of Ultrasonic Propagation Speed and Attenuation in Canine Tissue, Ultrasonic Imaging, Vol. 24, No. 4, pp. 246-260, 2002. Download/ View PDF Format (242 KB)
J. Ophir, K.A. Alam, B. Garra, F. Kallel, E.E. Konofagou, T. A. Krouskop, C.R.B. Meritt, R. Righetti, R. Souchon, S. Srinivasan, Tomy Varghese, Elastography: Imaging the elastic properties of soft tissues with Ultrasound, Invited Paper & Review, Journal of the Medical Ultrasonics, The Japan Soc. Ultrason. Med., Vol. 29, Winter, pp. 155-171, 2002. Download/ View PDF Format (3738 KB)

2003

Tomy Varghese, J.A. Zagzebski, P. Rahko, C.S. Breburda, Ultrasonic Imaging of Myocardial Strain Using Cardiac Elastography, Ultrasonic Imaging, Vol. 25, No. 1, pp. 1-16, 2003. Download/ View PDF Format (2320 KB)
E.L. Madsen, G.R. Frank, T.A. Krouskop, Tomy Varghese, F. Kallel, and J. Ophir, Tissue-mimicking Oil-in-gelatin Emulsions for use in Heterogeneous Elastography Phantoms, Ultrasonic Imaging, Vol. 25, No. 1, pp. 17-38, 2003. Download/ View PDF Format (284 KB)
A. Gerig, J.A. Zagzebski. and Tomy Varghese, Statistics of ultrasonic scatterer size estimation with a reference phantom, Journal of the Acoustic Society of America Imaging, Vol. 113, No. 6, pp. 3430-3437, 2003. Download/ View PDF Format (317 KB)
Tomy Varghese, U. Techavipoo, W. Liu, J.A.Zagzebski, Q. Chen, G. Frank, and F.T. Lee Jr, Elastographic Measurement of the Areas and Volumes of Thermal Lesions Resulting from Radiofrequency Ablation: Pathologic Correlation, AJR, Vol. 181, No. 3, pp. 701-707, 2003. Download/ View PDF Format (10,444 KB)
H. Tu, J.A. Zagzebski, E.L. Madsen and Tomy Varghese, "Ultrasound Attenuation Imaging Using Compound Acquisition and Processing",Ultrasonic Imaging, Vol. 25, No. 4, pp. 245-261, 2003. Download/ View PDF Format (2091 KB)
H. Shi, Tomy Varghese, Q. Chen, and G. Gimelli, "Correction For Simultaneous Catheter Eccentricity And Tilt On Strain Estimation In Intravascular Elastography", Ultrasonic Imaging, Vol. 25, No. 4, pp. 262-283, 2003. Download/ View PDF Format (1028 KB)

2004

Tomy Varghese and H. Shi, Elastographic Imaging Of Thermal Lesions In Liver In-Vivo Using Diaphragmatic Stimuli, Ultrasonic Imaging, Vol. 26, No. 1, pp. 18-28, 2004. Download/ View PDF Format (1238 KB)
U.Techavipoo and Tomy Varghese, Wavelet de-noising of displacement estimates in elastography, Ultrasound in Medicine and Biology, Vol. 30, No. 4, pp. 477-491, 2004. Download/ View PDF Format (1384 KB)
Tomy Varghese, U. Techavipoo, J.A. Zagzebski, and F.T. Lee Jr., Impact Of Gas Bubbles Generated During Interstitial Ablation On Elastographic Depiction Of in-vitro Thermal Lesions, Journal of Ultrasound in Medicine, Vol. 23, No. 4, pp. 535-544, 2004. Download/ View PDF Format (1054 KB)
U. Techavipoo, Q. Chen, Tomy Varghese, J.A.Zagzebski, and E.L. Madsen, Noise Reduction Using Spatial Angular Compounding For Elastography, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 51, No. 5, pp. 510-520, 2004. Download/ View PDF Format (1288 KB)
U.Techavipoo, Tomy Varghese, J.A. Zagzebski, Q. Chen and W. Liu, Semiautomated Thermal Lesion Segmentation For Three-Dimensional Elastographic Imaging, Ultrasound in Medicine and Biology, Vol. 30, No. 5, pp. 655-664, 2004. Download/ View PDF Format (588 KB)
W. Liu, U. Techavipoo, Tomy Varghese, J.A. Zagzebski, and Q. Chen, "Elastographic Versus X-Ray CT Imaging of Radiofrequency Ablation Coagulations: An In Vitro Study", Medical Physics. Vol. 31, No. 6, pp. 1322-1332, 2004. Download/ View PDF Format (1031 KB)
A. Gerig, Tomy Varghese, and J.A.Zagzebski, Improved Parametric Imaging of Scatterer Size Estimates Using Angular Compounding, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 51, No. 6, pp. 708-715, 2004. Download/ View PDF Format (1729 KB)
U. Techavipoo, Tomy Varghese, Q. Chen, T.A. Stiles, J.A.Zagzebski, and G. Frank, Temperature dependence of ultrasonic propagation speed and attenuation in excised canine liver tissue measured using transmitted and reflected pulses, Journal of the Acoustic Soceity of America, Vol. 115, No. 6, pp. 2859-2865, 2004. Download/ View PDF Format (395 KB)
M.Z. Kiss, Tomy Varghese, and T.J. Hall, Viscoelastic characterization of in-vitro canine tissue, Physics in Medicine and Biology, Vol. 49, No. 18, pp. 4207-4218, 2004. Download/ View PDF Format (419 KB)
A.L. Gerig, Q. Chen, J.A. Zagzebski and Tomy Varghese, Correlation of ultrasonic scatterer size estimates for the statistical analysis and optimization of angular compounding. Journal of the Acoustic Soceity of America, Vol. 116, No. 3, pp. 1832-1841, 2004. Download/ View PDF Format (138 KB)
U.Techavipoo, Q. Chen, Tomy Varghese, and J.A. Zagzebski, Estimation of Displacement Vectors and Strain Tensors in Elastography Using Angular Insonifications, IEEE Transactions on Medical Imaging, Vol. 23, No. 12, pp. 1479-1489, 2004. Download/ View PDF Format (588 KB)
S.K. Alam, F.L. Lizzi, Tomy Varghese, E.J. Feleppa, and S. Ramachandran, Adaptive spectral strain estimators for elastography, Ultrasonic Imaging, Vol. 26, No. 3, pp. 131-149, 2004. Download/ View PDF Format (9860 KB)
Tomy Varghese and M.J. Daniels, Real-Time Calibration of Temperature Estimates during Radiofrequency Ablation, Ultrasonic Imaging, Vol. 26, No. 3, pp. 185-200, 2004. Download/ View PDF Format (836 KB)

2005

S. Bharat, U. Techavipoo, M.Z. Kiss, W. Liu, and Tomy Varghese, Monitoring Stiffness Changes in Lesions after Radiofrequency Ablation at Different Temperatures and Durations of Ablation, Ultrasound in Medicine and Biology, Vol. 31, No. 3, pp. 415-422, 2005. Download/ View PDF Format (242 KB)
U.Techavipoo and Tomy Varghese, Improvements in Elastographic Contrast to Noise Ratio Using Spatial-Angular Compounding, Ultrasound in Medicine and Biology, Vol. 31, No. 4, pp. 529-536, 2005. Download/ View PDF Format (275 KB)
Q. Chen, A. L. Gerig, U. Techavipoo, J.A. Zagzebski, and Tomy Varghese, Correlation of RF Signal in Angular Compounding, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 52, No. 6, pp. 961-970, 2005. Download/ View PDF Format (672 KB)
H. Shi, Q. Chen and Tomy Varghese, "A General Solution for Catheter Position Effects for Strain Estimation in Intravascular Elastography", Ultrasound in Medicine and Biology, Vol. 31, No. 11, pp. 1509-1526, 2005. Download/ View PDF Format (3263 KB)
U. Techavipoo, Q.Chen and Tomy Varghese, "Ultrasonic Noninvasive Temperature Estimation Using Echoshift Gradient Maps: Simulation Results', Ultrasonic Imaging, Vol. 27, No. 3, pp. 89-100, 2005. Download/ View PDF Format (5583 KB)
E.L. Madsen, M.A. Hobson, H. Shi, Tomy Varghese and G.R. Frank, "Tissue-mimicking Agar/Gelatin Mixtures for use in Heterogeneous Elastography Phantoms", Physics in Medicine and Biology, Vol. 50, No. 23, pp. 5597-5618, 2005. Download/ View PDF Format (212 KB)
E.L. Madsen,G.R. Frank, M.A. Hobson, H. Shi, J. Jiang, Tomy Varghese and T.J. Hall, "Spherical Lesion Phantoms for Testing the Performance of Elastography Systems", Physics in Medicine and Biology, Vol. 50, No. 24, pp. 5983-5995, 2005. Download/ View PDF Format (153 KB)
M. Rao and Tomy Varghese, "Spatial Angular Compounding for Elastography without the Incompressibility Assumption', Ultrasonic Imaging, Vol. 27, No. 3, pp. 256-270, 2005. Download/ View PDF Format (1402 KB)

2006

E.L. Madsen, M.A. Hobson, H. Shi, Tomy Varghese and G.R. Frank, "Stability of Heterogeneous Elastography Phantoms Made from Oil Dispersions in Aqueous Gels", Ultrasound in Medicine and Biology, Vol. 32, No. 2, pp. 261-270, 2006. Download/ View PDF Format (224 KB)
C. Gorig, Tomy Varghese, T.A. Stiles, J.A. Zagzebski, C. J. Murphy, "Acoustic propagation speed of the porcine, canine and rabbit lens and vitreous at 10 MHz", American Journal of Veterinary Research, Vol. 67, No. 2, pp. 288-295, 2006. Download/ View PDF Format (284 KB)
M. Rao, Q. Chen, H. Shi, Tomy Varghese, "Spatial-Angular Compounding for Elastography Using Beam Steering on Linear Array Transducers", Medical Physics, Vol. 33, No. 3, pp. 618-626, 2006. Download/ View PDF Format (497 KB)
W. Liu J.A. Zagzebski, Tomy Varghese, C.R. Dyer, U. Techavipoo, and T. J. Hall, "Segmentation of Structures on Elastographic Images using a Coarse-to-Fine Active Contour Model", Ultrasound in Medicine and Biology, Vol. 32, No.3, pp. 397-408, 2006. Download/ View PDF Format (1548 KB)
Tomy Varghese, Q. Chen, P.S. Rahko and J.A. Zagzebski, and C.S. Breburda, "Two-Dimensional Ultrasonic Imaging of Myocardial Strain" IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, (Front CoverImage), Vol. 53, No. 4, pp. , 2006. Download/ View PDF Format (593 KB)
E.L. Madsen, M.A. Hobson, G. R. Frank, H. Shi, J. Jiang, T. J. Hall, Tomy Varghese, M. M. Doyley and J. B. Weaver. "Anthropomorphic breast phantoms for testing elastography systems", Ultrasound in Medicine and Biology, Vol. 32, No. 6, pp. 857-874, 2006. Download/ View PDF Format (1401 KB)
M. Rao and Tomy Varghese, Correlation analysis of the beam angle dependence for elastography, Journal Acoustic Society America, Vol. 119, No. 6, pp. 4093-4101, 2006. Download/ View PDF Format (308 KB)
T.A. Wilson, Q. Chen, J. A. Zagzebski, Tomy Varghese, and L. Van Middlesworth, "Initial Clinical Experience Imaging Scatterer Size and Strain in Thyroid Nodules in-vivo", Journal of Ultrasound in Medicine, Vol. 25, No. 7, pp. 1021-1029, 2006. Download/ View PDF Format (1054 KB)
T.A. Wilson, J. A. Zagzebski, Tomy Varghese, Q. Chen, and M. Rao, "The Ultrasonix 500RP: A Commercial Ultrasound Research Interface", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 53, No. 10, pp. 1772-1782, 2006. Download/ View PDF Format (749 KB)
M.Z. Kiss, M.A. Hobson, Tomy Varghese, M.A. Kliewer, J. Harter, E.M. Hartenbach, and J.A. Zagzebski, "Frequency-dependent Complex Modulus of the Uterus: Preliminary Results", Physics in Medicine and Biology, Vol. 51, No. 15, pp. 3683-3695, 2006. Download/ View PDF Format (755 KB)
G. Pareek, E.R. Wilkinson, S. Bharat, Tomy Varghese, P.F. Laeseke, F.T. Lee Jr., T.F. Warner, J.A. Zagzebski, S.Y. Nakada, "Elastographic Measurements of in-vivo Radiofrequency Ablation Lesions of the Kidney", Journal of Endourology, Vol. 20, No. 11, pp. 000-000, 2006. Download/ View PDF Format (301 KB)
S. Bharat, and Tomy Varghese, "Contrast-transfer improvement for electrode displacement elastography", Physics in Medicine and Biology, Vol. 51, No. 24, pp. 6403-6418, 2006. Download/ View PDF Format (592 KB)
W. Liu, J.A. Zagzebski, Tomy Varghese, A.L. Gerig, and T.J. Hall, "Spectral and Scatterer Size Correlation during Angular Compounding- Simulation and Experiment Studies', Ultrasonic Imaging, Vol. 28, No. 4, pp. 230-244, 2006. Download/ View PDF Format (961 KB)
Tomy Varghese, Q. Chen, P.S. Rahko and J.A. Zagzebski, "Cardiac Elastography, Full-field Development", Encyclopedia of Biomaterials and Biomedical Engineering, (Invited paper), Editors: Drs. Gary Wnek, and Gary Bowlin, Vol. 00, No. 0, pp. 1-8, 2006. Download/ View PDF Format (593 KB)

2007

H. Chen, H. Shi, and Tomy Varghese, "Two-Step Cross-correlation Method for Elastography", Ultrasound in Medicine and Biology, Vol. 33, No. 1, pp. 48-56, 2007. Download/ View PDF Format (1210 KB)
M. Rao, Q. Chen, H. Shi, Tomy Varghese, E.L. Madsen, J.A. Zagzebski and T.A. Wilson, "Normal and Shear Strain Estimation Using Beam Steering on Linear-Array Transducers", Ultrasound in Medicine and Biology, Vol. 33, No. 1, pp. 57-66, 2007. Download/ View PDF Format (584 KB)
H. Shi, and Tomy Varghese, "Two-dimensional multi-level strain estimation for discontinuous tissue", Physics in Medicine and Biology, Vol. 52, No. 2, pp. 389-401, 2007. Download/ View PDF Format (534 KB)
J. Jiang, Tomy Varghese, Q. Chen, J.A. Zagzebski, and T.J. Hall, "Finite Element Analysis of Tissue Deformation with a Radiofrequency Ablation Electrode for Strain Imaging", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 54, No. 2, pp. 281-289, 2007. Download/ View PDF Format (749 KB)
H. Kim, and Tomy Varghese, "Spectral Cross-Correlation for Attenuation estimation", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 54, No. 3, pp. 510-519, 2007. Download/ View PDF Format (469 KB)
H. Shi, H. Tu, R.J. Dempsey, and Tomy Varghese, "Ultrasonic Attenuation Estimation in Small Plaque Samples using a Power Difference Method', Ultrasonic Imaging, Vol. 29, No. 1, pp. 15-30, 2007. Download/ View PDF Format (1385 KB)
M. A. Hobson, M.Z. Kiss, Tomy Varghese, A.M. Sommer, M. A. Kliewer, J. A. Zagzebski, T. J. Hall, J. Harter, E. M. Hartenbach, and E. L. Madsen, "In Vitro Uterine Strain Imaging: Preliminary Results", Journal of Ultrasound in Medicine, Vol. 26, No. 7, pp. 899-908, 2007. Download/ View PDF Format (328 KB)
M. J Daniels, Tomy Varghese, E L Madsen and J A Zagzebski, "Non-invasive ultrasound-based temperature imaging for monitoring radiofrequency heating-Phantom results", Physics in Medicine and Biology, Vol. 52, No. 16, pp. 4827-4823, 2007. Download/ View PDF Format (726 KB)
M. Rao and Tomy Varghese, "Correlation Analysis for Angular Compounding in Strain Imaging",IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 54, No. 9, pp. 1903-1907, 2007. Download/ View PDF Format (337 KB)

2008

M. J Daniels, J.Jiang, Tomy Varghese, "Ultrasound Simulation of Real-Time Temperature Estimation during Radiofrequency Ablation using Finite Element Models", Ultrasonics, Vol. 48, No. 1, pp. 40-55, 2008. Download/ View PDF Format (1643 KB)
M. Rao, Tomy Varghese, E.L. Madsen, "Shear Strain Imaging Using Shear Deformations", Medical Physics, Vol. 35, Issue 2, pp. 412-423, 2008. Also reproduced in Virtual Journal of Biological Physics Research, Vol. 15, Issue 2, 2008. Download/ View PDF Format (683 KB)
H. Kim,J.A. Zagzebski, and Tomy Varghese, "Estimation of Ultrasound Attenuation from Broadband Echo-Signals using Bandpass Filtering", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 55, No. 5, pp. 1153-1159, 2008. Download/ View PDF Format (675 KB)
H. Chen, and Tomy Varghese, "Noise Analysis and Improvement of Displacement Vector Estimation from Angular Displacements" Medical Physics, Vol. 35, No. 5, pp. 2007-2017, 2008. Download/ View PDF Format (257 KB)
S. Bharat, T.G. Fisher, Tomy Varghese, T.J. Hall, J. Jiang, E.L. Madsen, J.A. Zagzebski, and F.T. Lee Jr., "Three-dimensional Electrode Displacement Elastography Using the Siemens C7F2 fourSight 4D Ultrasound Transducer", Ultrasound in Medicine and Biology, Vol. 34, No. 8, pp. 1307-1316, 2008. Download/ View PDF Format (1363 KB)
M.A. Hobson, E.L. Madsen, G.R. Frank, H. Shi, J. Jiang, T.J. Hall, Tomy Varghese, "Anthropomorphic phantoms for assessment of strain imaging methods involving saline infused sonohysterography", Ultrasound in Medicine and Biology, Vol. 34, No. 10, pp. 1622-1637, 2008. Download/ View PDF Format (4119 KB)
H.Shi, Tomy Varghese, R.J. Dempsey, M.S. Salamat, J.A. Zagzebski, "Relationship between Ultrasonic Attenuation, Size and Axial Strain Parameters for ex-vivo Atherosclerotic Carotid Plaque", Ultrasound in Medicine and Biology, Vol. 34, No. 10, pp. 1666-1667, 2008. Download/ View PDF Format (1205 KB)
M. Zhao, J.D. Shea, S.C. Hagness, D.W. van der Weide, B.D. Van Veen, and Tomy Varghese, "Numerical Study of Microwave Scattering in Breast Tissue via Coupled Dielectric and Elastic Contrasts", IEEE Antennas and Wireless Propagation Letters, Vol. 00, No. 00, pp. 000-000, 2008. Download/ View PDF Format (215 KB)
S. Bharat, Tomy Varghese, E.L. Madsen, J.A. Zagzebski, "Radiofrequency ablation Electrode displacement Elastography: A Phantom Study", Medical Physics, Vol. 35, No. 6, pp. 2432-2442, 2008. Download/ View PDF Format (1197 KB)
H. Kim, Tomy Varghese, "Hybrid Spectral Domain Method for Attenuation Slope Estimation", Ultrasound in Medicine and Biology, Vol. 34, No. 11, pp. 1808-1819, 2008. Download/ View PDF Format (1263 KB)
M. Rao, Tomy Varghese, and J.A. Zagzebski,"Simulation of ultrasound two-dimensional array transducers using a frequency domain model", Medical Physics, Vol. 35, No. 7, pp. 3162-3169, 2008. Download/ View PDF Format 488 KB)
M. Rao, and Tomy Varghese, "Correlation analysis of three-dimensional strain imaging using ultrasound two-dimensional array transducers", Journal Acoustic Society, Vol. 124, No. 3, pp. 1858-1865, 2008. Download/ View PDF Format (714 KB)
W. Liu, J.A. Zagzebski, T.J. Hall, E.L. Madsen, Tomy Varghese, M.A. Kliewer, S. Panda, S. Barnes, C. Lowery, "Acoustic backscatter and effective scatterer size estimates using a 2D CMUT transducer", Physics in Medicine and Biology, (Epub 2008 Jul 17), Vol. 53, No. 15, pp.4169-4183, 2008. (PMCID: PMC2758163). Download/ View PDF Format (768 KB)
H. Shi, C.C. Mitchell, M. McCormick, M.A. Kliewer, R.J. Dempsey, Tomy Varghese, "Preliminary in-vivo atherosclerotic carotid plaque characterization using the accumulated axial strain and relative lateral shift based strain indices", Physics in Medicine and Biology, Vol. 53, No. 22, pp. 6377-6394, 2008. (PMCID: PMC2891504). Download/ View PDF Format (490 KB)

2009

H. Chen, Tomy Varghese, PS. Rahko, J.A. Zagzebski, "Ultrasound Frame Rate Requirements for Elastography during Cyclic Compressions: Experimental and in-vivo Results", Ultrasonics, Vol. 49, No. 1, pp. 98-111, 2009. Download/ View PDF Format (2582 KB)
J. Farron, Tomy Varghese, D.G. Thelen, "Measurement of tendon strain during muscle twitch contractions using ultrasound elastography", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 56, No. 1, pp. 27-35, 2009. Download/ View PDF Format (728KB)
M. Rao, and Tomy Varghese, "Estimation of the optimal maximum beam angle and angular increment for normal and shear strain estimation", IEEE Transactions on Biomedical Engineering, Vol. 56, No. 3, pp. 760-769, 2009. Download/ View PDF Format (767 KB)
H. Chen, and Tomy Varghese, "Principal component analysis of shear strain effects", Ultrasonics, Vol. 49, No. 4-5, pp. 472-483, 2009. Download/ View PDF Format (1330 KB)
M. Z. Kiss, M.J. Daniels and Tomy Varghese, "Investigation of temperature-dependent viscoelastic properties of thermal lesions in in-vitro animal liver tissue", J. Biomech, Vol. 42, No. 8, pp. 959-966, 2009. (PMCID: PMC27609972013). Download/ View PDF Format (323 KB)
H. Chen, and Tomy Varghese, "Multi-level hybrid 2-D strain imaging algorithm for ultrasound sector/ phased arrays", Medical Physics, Vol. 36, No. 6, pp. 2098-2106, 2009. (PMCID: PMC2832063). Download/ View PDF Format (730KB)
J. Jiang, Tomy Varghese, C. Brace, E.L. Madsen, T.J Hall, S. Bharat, M.A Hobson, J.A. Zagzebski, and F.T. Lee Jr., "Young"s modulus reconstruction for radiofrequency ablation electrode-induced displacement fields: A feasibility study", IEEE Transactions on Medical Imaging, Vol. 28, No. 8, pp. 1325-1334, 2009. (PMCID: PMC2843513). Download/ View PDF Format (764 KB)
H. Shi, Tomy Varghese, C.C. Mitchell, M. McCormick, R.J. Dempsey, M.A. Kliewer, "In-vivo attenuation and equivalent scatterer size parameters for atherosclerotic carotid plaque: preliminary results", Ultrasonics, Vol. 49, No. 8, pp. 779-785, 2009. (PMCID: PMC2785011). Download/ View PDF Format (553 KB)

2010

N. Rubert, S. Bharat, R.J. Dewall, A. Andreano, C. Brace, J. Jiang, and Tomy Varghese, "Electrode Displacement Strain Imaging of Thermally-Ablated Liver Tissue in an in-vivo Animal Model", Medical Physics, Vol. 37, No. 3, pp. 1075-1082, 2010. (PMCID: PMC2837725). Download/ View PDF Format (588KB)
J. Jiang, C. Brace, A. Andreano, R. DeWall, N. Rubert, T. Fisher, Tomy Varghese, F.T. Lee Jr., and T.J. Hall, "Ultrasound based elastic modulus imaging for visualizing thermal ablation zones in a porcine model", Physics in Medicine and Biology, Vol. 55, No.8, pp,2281-2306, 2010. (PMCID: PMC3068604). Download/ View PDF Format (2323 KB)
M.J. Daniels, Tomy Varghese, "Dynamic frame selection for in-vivo ultrasound temperature estimation during radiofrequency ablation," Physics in Medicine and Biology, Vol. 55, No.16, pp. 4735-4753, 2010. (PMCID: PMC3065174). Download/ View PDF Format (1301 KB)
S. Bharat, Tomy Varghese, " Radiofrequency electrode vibration-induced shear wave imaging for tissue modulus estimation: a simulation study" Journal Acoustic Society of America, Vol. 128, No.4, pp. 1582-1585, 2010. Also reproduced in Virtual Journal of Biological Physics Research, Vol. 20, Issue 9, 2010. (PMCID: PMC2981108). Download/ View PDF Format (2349 KB)
H. Xu, M. Rao, Tomy Varghese, A. Sommer, S. Baker, TJ Hall, GA Sisney, ES Burnside, "Axial Shear Strain Imaging for Differentiating Benign and Malignant Breast Masses", Ultrasound in Medicine and Biology, Vol. 36, No. 11, pp. 1813"1824, 2010. doi:10.1016/j.ultrasmedbio.2010.07.008. (PMCID: PMC3033738). Download/ View PDF Format (1358 KB)
H. Chen, and Tomy Varghese, "Three Dimensional Canine Heart Model for Cardiac Elastography," Medical Physics, Vol. 37, No. 11, pp. 5876-5886, 2010. doi:10.1118/1.3496326. Also reproduced in Virtual Journal of Biological Physics Research, Vol. 20, Issue 9, 2010. (PMCID: PMC2980546). Download/ View PDF Format (1526 KB)
R.J. DeWall, Tomy Varghese, M.A. Kliewer, J.M. Harter, and E.M. Hartenbach, "Compression-dependent Viscoelastic Behavior of Human Cervical Tissue", Ultrasonic Imaging,Vol. 31, No. 4, pp. 203-216, 2010. (PMCID: PMC3074596). Download/ View PDF Format (1023 KB)

2011

H. Xu, Tomy Varghese, and E.L. Madsen "Analysis of Shear Strain Imaging for Classifying Breast Masses: Finite element and Phantom results," Medical Physics, Vol. 38, No. 11, pp, 6119-6127, 2011. Download/ View PDF Format (2211 KB)
M. McCormick, E.L. Madsen, M. Deaner, and Tomy Varghese, "Absolute backscatter measurements of tissue-mimicking phantoms in the 5-50 MHz frequency range" Journal Acoustic Society of America, Vol. 130, No. 2, pp, 737-743, 2011. Download/ View PDF Format (5983 KB)
E. Omari, H. Lee, Tomy Varghese, "Theoretical and phantom based investigation of the impact of sound speed and backscatter variations on attenuation slope estimation", Ultrasonics, Vol. 51, No. 6, pp. 758-767, 2011. Download/ View PDF Format (1493 KB)
M. McCormick, N. Rubert, and Tomy Varghese, "Bayesian Regularization applied to Ultrasound Strain Imaging," IEEE Transactions on Biomedical Engineering, Vol. 58, No. 6, pp, 1612-1620, 2011. Download/ View PDF Format (944 KB)
R.J. DeWall, Tomy Varghese, and E.L. Madsen, "Shear Wave Velocity Imaging using Transient Electrode Perturbation: Phantom and ex-vivo validation", IEEE Transactions on Medical Imaging, Vol. 30, No. 3, pp. 666-678, 2011. Digital Object Identifier: 10.1109/TMI.2010.2091412. (PMCID: PMC3066053). Download/ View PDF Format (1112 KB)
M.Z. Kiss, Tomy Varghese, and M.A. Kliewer, "Ex-vivo ultrasound attenuation coefficient for human cervical and uterine tissue from 5 to 10 MHz", Ultrasonics, Vol. 51, No. 4, pp. 467-471, 2011. Digital Object Identifier: 10.1016/j.ultras.2010.11.012. (PMCID: PMC3056396). Download/ View PDF Format (515 KB)

2012

R.J. DeWall, Tomy Varghese, "Improving thermal ablation delineation with electrode vibration elastography using a bi-directional shear wave propagation assumption", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 59, No. 1, pp. 168-173, 2012.Download/ View PDF Format (1207 KB)
R.J. DeWall, Tomy Varghese, C.L. Brace, "Quantifying local stiffness variations in radiofrequency ablations with dynamic indentation", IEEE Transactions on Biomedical Engineering, Vol. 59, No. 3, pp. 728-735, 2012.Download/ View PDF Format (652 KB)
E. Omari, Tomy Varghese, M.A. Kliewer, "A saline infusion sonohysterography based novel strain imaging approach for evaluation of uterine abnormalities in-vivo: Preliminary results", Journal of Ultrasound in Medicine, Vol. 31, No. 4, pp. 609-615, 2012. Download/ View PDF Format (1030 KB)
C. Ma, Tomy Varghese, "Lagrangian deformation tracking using a polar-grid between endocardial and epicardial contours for cardiac strain imaging", Medical Physics, Vol. 39, No. 4, pp. 1779-1792, 2012. Download/ View PDF Format (8736 KB)
R.J. DeWall, S. Bharat, Tomy Varghese, M.E. Hanson, R.M. Agni, M.A. Kliewer, "Characterizing thecompression dependent viscoelastic properties of human hepatic pathologies using dynamic compression testing", Physics in Medicine and Biology, Vol. 57, No. 8, pp. 2273-2286, 2012. Download/ View PDF Format (1368 KB)
W Ge, CG Krueger, A Weichmann, D Shanmuganayagam, and Tomy Varghese, "Displacement and strain estimation for evaluation of arterial wall stiffness using a familial hypercholesterolemia swine model of atherosclerosis", Medical Physics, Vol. 39, No. 7, pp. 4483-4492, 2012. Download/ View PDF Format (2200 KB)
BG Rocque, D Jackson, Tomy Varghese, B Hermann, M McCormick, MA Kliewer , C Mitchell, RJ Dempsey, "Impaired cognitive function in patients with atherosclerotic carotid stenosis and correlation with ultrasound strain measurements", J Neurol. Sci., Vol. 322, No. 1-2, pp. 20-24, 2012. Download/ View PDF Format (693 KB)
H. Xu, Tomy Varghese, J. Jiang, J.A. Zagzebski, "In-vivo classification of breast masses using features derived from axial-strain and axial-shear images", Ultrasonic Imaging, Vol. 34, No. 4, pp. 222-236, 2012. Download/ View PDF Format (522 KB)
M McCormick, Tomy Varghese, X. Wang, R.J. Dempsey, C. C. Mitchell, and M.A. Kliewer, "Methods for robust in-vivo strain estimation in the carotid artery", Physics in Medicine and Biology, Vol. 57, No. 22, pp.7329-7353, 2012. Download/ View PDF Format (3373 KB)
R.J. DeWall, Tomy Varghese, C.L. Brace, "Visualizing ex-vivo radiofrequency and microwave ablation zones using electrode vibration elastography", Medical Physics, Vol. 39, No. 11, pp. 6692-6700, 2012. Download/ View PDF Format (1608 KB)

2013

H. Xu, Tomy Varghese, "Normal and shear strain imaging using 2D deformation tracking on beam-steered linear array datasets", Medical Physics, Vol. 40, No. 1, 012902, 2013.Download/ View PDF Format (2365 KB)
C. Ma, Tomy Varghese, "Comparison of cardiac displacement and strain imaging using ultrasound radiofrequency and envelope signals", Ultrasonics, Vol. 53, No. 3, pp. 782-792, 2013.Download/ View PDF Format (2024 KB)
E. Omari, Tomy Varghese, E.L. Madsen, G. Frank "Evaluation of the impact of backscatter intensity variations on ultrasound attenuation estimation", Medical Physics, Vol. 40, No. 8, 082904,1-10, 2013. Download/ View PDF Format (1312 KB)
N. Rubert, Tomy Varghese, "Mean scatterer spacing estimation using multi-taper coherence estimates", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 60, No. 6, pp. 1061-1073, 2013. Download/ View PDF Format (2951 KB)
S. Ahmed, R. Cao, Tomy Varghese, L. Bidaut, G. Nabi, "Transrectal quantitative shear wave elastography in the detection and characterization of prostate cancer", Surgical Endoscopy, Vol. 27, No. 9, pp. 3280-3287, 2013. Download/ View PDF Format (453 KB)
M. McCormick, Tomy Varghese, "An approach to unbiased subsample interpolation for motion tracking",Ultrasonic Imaging,Vol. 35, No. 2, pp. 76-89, 2013. Download/ View PDF Format (1546 KB)

R. Cao, G. Nabi, Tomy Varghese, Z. Huang, "Tissue mimicking materials for the detection of prostate cancer using shear wave elastography: A validation study", Medical Physics,Vol.40, No. 2, 022903, 2013. Download/ View PDF Format (1517 KB)

2014

X. Wang, DC Jackson, Tomy Varghese, CC Mitchell, BP Hermann, M.A. Kliewer, R.J. Dempsey, "Correlation of cognitive function with ultrasound strain indices in carotid plaque",Ultrasound in Medicine and Biology, Vol. 40, No. 1, pp.78-89, 2014. Download/ View PDF Format ( KB)

N. Rubert, Tomy Varghese, "Mean scatterer spacing estimation in normal and thermally coagulated ex vivo bovine liver",Ultrasonic Imaging, Vol. 36, No. 2, pp. 79-97, 2014. Download/ View PDF Format ( KB)

E. Omari, Tomy Varghese "Signal to noise ratio comparisons for ultrasound slope estimation algorithms",Medical Physics, Vol. 41, No. 3, 032902, 2014. Download/ View PDF Format ( KB)

C. Ma, Tomy Varghese,"Analysis of two-dimensional ultrasound cardiac strain imaging using joint probability density functions",Ultrasound in Medicine and Biology, Vol. 40, No. 6, pp. 1118-1132, 2014. Download/ View PDF Format ( KB)

N. Rubert, Tomy Varghese, "Scatterer number density considerations in reference phantom based attenuation estimation",Ultrasound in Medicine and Biology, Vol. 40, No. 7, pp.1680-1696,2014. Download/ View PDF Format ( KB)

A.N. Ingle, Tomy Varghese, "Three dimensional sheaf of ultrasound planes reconstruction (SOUPR) of ablated volumes",IEEE Transactions on Medical Imaging, Vol. 33, No. 8, pp. 1677-88, 2014. Download/ View PDF Format ( KB)

2015

A.N. Ingle, J. Bucklew, W. Sethares, Tomy Varghese, "Slope estimation in noisy piecewise linear functions",Signal Processing, Vol. 108, No. 3, pp. 576-588, 2015. Download/ View PDF Format ( KB)

K. Samimi, Tomy Varghese, "Performance evaluation of the spectral centroid downshift method for attenuation estimation", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 62, No. 5, pp. 871-880, 2015. Download/ View PDF Format ( KB)

E. Omari, Tomy Varghese, M.A. Kliewer, J. Harter, E.M. Hartenbach, "Dynamic and Quasi-static mechanical testing for characterization of the viscoelastic properties of human uterine tissue", Journal of Biomechanics, Vol. 48, No. 10, pp. 1730-1736, 2015. Download/ View PDF Format ( KB)

S.E. Berman, X. Wang, C.C. Mitchell, B. Kundu, D.C. Jackson, S.M. Wilbrand,Tomy Varghese, BP Hermann, H. Rowley, S.C. Johnson, R.J. Dempsey, "The relationship between carotid artery plaque stability and white matter ischemic injury", NeuroImage: Clinical, Vol. 9, pp. 216-222, 2015. Download/ View PDF Format ( KB)