DEPARTMENT OF MEDICAL PHYSICS

UNIVERSITY OF WISCONSIN -School of Medicine & Public Health

 

QUICK LINKS: [Medical Physics Home Page]  [Medical Physics Faculty Profile]

DEPARTMENT OF MEDICAL PHYSICS 

 

Research Areas

Tomy Varghese Ph.D.

Associate Professor, Medical Physics

 

1173 Wisconsin Institutes for Medical Research

UW-Medical Physics, Ultrasound Imaging

Madison, WI 53705

 

Telephone: 608/265-8797 (office)

Fax: 608/262-2413

E-mail:  tvarghese@wisc.edu

  

PROFILE LINKS

  
 

OTHER DEPARTMENT AFFILIATIONS [back to top of page]

  • Medical Physics

  • Bioengineering

 

EDUCATION [back to top of page]

  
 

  • B.E., (1988) Instrumentation Techology University of Mysore, Mysore, India

  • M.S., (1992) Electrical Engineering, University of Kentucky, Lexington, KY

  • Ph.D., (1995) Electrical Engineering, University of Kentucky, Lexington, KY

  • Post-Doctoral Fellow, (1995-2000) Radiology, University of Texas Medical School, Houston

  
  RESEARCH INTEREST [back to top of page]  
 
  • Elastography, Signal and Image processing applications in medical imaging, ultrasound tissue characterization
  

POSITIONS [back to top of page]

  • 01/2002 – 04/2006,  Assistant Professor, Dept of Biomedical Engineering, U of Wisconsin, Madison

  • 04/2006 – Present, Associate Professor, Dept of Medical Physics, U of Wisconsin, Madison

  • 04/2006 – Present,  Associate Professor, Dept of Biomedical Engineering, U of Wisconsin, Madison

  • 05/2006 – Present, Associate Professor, Electrical & Computer Engineering, U of Wisconsin, Madison

 

AWARDS AND HONORS [back to top of page]

  
 

  • Sigma Xi Research Day Best Poster Award:  J. Ophir, EE Konofagou, T. Varghese, F. Kallel, S. K. Alam, and I. Céspedes, "Elastography: A quantitative method for imaging the elasticity of biological tissue", April 3, University of Houston, (1997).

  • Member, ETA Kappa Nu (Electrical Engineering Honor Society)

  • Outstanding Teacher evaluation, Letter of appreciation, Dean, University of Kentucky, Lexington, KY, 1994.

  • Recipient, Raja Ramanna Gold Medal, Best Outgoing Student, First Rank in Instrumentation Technology, University of Mysore, Mysore, India, 1988.

 

MEMBERSHIPS [back to top of page]

  
 

  • Member, American Institute of Medicine (AIUM)

  • Senior Member, Institute of Electrical and Electronics Engineers (IEEE)

  • Associate Member, Indian Institute of Engineers (AMIE).

  

 

PATENTS [back to top of page]

  

  1. Tomy Varghese, C.S. Breburda, J.A. Zagzebski, and P.S. Rahko "Method and Apparatus for Cardiac Elastography", U.S. Patent No. 6,749,571, 2004.

 

PUBLICATIONS [back to top of page]

 
 

  1. Tomy Varghese, and K. D. Donohue, "Characterization of tissue microstructure scatterer distribution with spectral correlation", Ultrasound Imaging Vol.-15, pp. 238-254, 1993.

  2. 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.

  3. Tomy Varghese, and Jonathan Ophir, "Performance optimization in elastography: Multicompression with temporal stretching",  Ultrasonic Imaging, Vol. 18, No. 3, pp. 193-214, 1996.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. Tomy Varghese, E. E. Konofagou, J. Ophir, 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.

  11. 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.

  12. Tomy Varghese, J.A. Zagzebski and F.T. Lee Jr., "Elastographic Imaging of thermal lesions in the liver in-vivo following radiofrequency ablation: Preliminary Results", Ultrasound in Medicine and Biology, Vol. 28, No. 11/12, pp. 1467-1473, 2002.

  13. U. Techavipoo, Tomy Varghese, J.A. Zagzebski, T.A. Stiles and G. Frank, "Temperature Dependence of Ultrasonic Propagation Speed and Attenuation in Canine Tissue", Ultrasonic Imaging, Vol. 24, pp. 246-260, 2002.

  14. Tomy Varghese, J.A. Zagzebski, P. Rahko, and C.S. Breburda, “Ultrasonic imaging of myocardial strain using cardiac elastography", Ultrasonic Imaging, Vol. 25, No. 1, pp. 1-16, 2003.

  15. Tomy Varghese, U. Techavipoo, W. Liu, J.A. Zagzebski, Q. Chen, G. Frank and F.T. Lee Jr., “Elastographic Measurement of Area and Volume of Thermal Lesions Resulting from Radiofrequency Ablation: Pathologic correlation”, American Journal of Roentgenology, AJR, Vol. 181, No. 3, pp. 701-707, 2003.

  16. U. Techavipoo, Q. Chen, Tomy Varghese, J.A. Zagzebski, and E.L. Madsen “Noise reduction using spatial angular compounding for Elastography”, IEEE Trans Ultrasonics Ferroelectrics Frequency Control, Vol. 51, No. 5, pp. 510-520, 2004.

  17. 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.

  18. 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.

  19. 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.

  20. Q. Chen, A. L. Gerig, U. Techavipoo, J.A. Zagzebski, and Tomy Varghese, “Correlation of RF Signal during Angular Compounding”, IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, Vol. 52, No. 6, pp. 961-970, 2005.

  21. H. Shi, Tomy Varghese, and Q. Chen, “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.

  22. 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.

  23. 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.

  24. M. Rao, and Tomy Varghese, “Spatial Angular Compounding for Elastography without the Incompressibility Assumption”, Ultrasonic Imaging, Vol. 27, No. 4, pp. 256-270, 2005.

  25. C. Görig, Tomy Varghese, T.A. Stiles, JVD Broek, J.A. Zagzebski, C. J. Murphy, “Evaluation of acoustic wave propagation velocities in the ocular lens and vitreous tissue of pigs, dogs, and rabbits”, American Journal of Veterinary Research, Vol. 67, No.2, pp. 288-295,  2006.

  26. 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.

  27. 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.

  28. 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.

  29. EL Madsen, MA Hobson, GR Frank, H. Shi, J Jiang, TJ Hall, Tomy Varghese, MM. Doyley and JB Weaver, “Anthropomorphic Breast Phantoms for Testing Elastography Systems”, Vol. 32, No.6, pp. 857-874, Ultrasound Med Biol, 2006.

  30. 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.

  31. MZ Kiss, MA 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. 15, No.15, pp. 3683-3695,  2006.

  32. T. 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, (in press) 2006.

  33. H. Chen, H. Shi, T. Varghese, “Two-Step Cross-correlation Method for Elastography," Ultrasound Med Biol, (in press) 2006.

  34. 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, (in press), 2006.

  35. 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 Trans Ultrason Ferroel Freq Cont, (in press), 2006.

Last Modified: 04/02/2008

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