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Jonathan Ophir

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TOP 3
Arun K Thittai; Jose-Miguel Yamal; Jonathan Ophir
Small breast lesion classification performance using the normalized axial-shear strain area feature.
Arun K Thittai; Belfor Galaz; Jonathan Ophir
On the advantages of imaging the axial-shear strain component of the total shear strain in breast tumors.
Arun K Thittai; Belfor Galaz; Jonathan Ophir
Visualization of HIFU-induced lesion boundaries by axial-shear strain elastography: a feasibility study.

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All Publications

2013: Arun K Thittai; Jose-Miguel Yamal; Jonathan Ophir
Small breast lesion classification performance using the normalized axial-shear strain area feature.
Ultrasound in medicine & biology 2013;39(3):543-8.
2012: Arun K Thittai; Belfor Galaz; Jonathan Ophir
On the advantages of imaging the axial-shear strain component of the total shear strain in breast tumors.
Ultrasound in medicine & biology 2012;38(11):2031-7.
2011: Arun K Thittai; Belfor Galaz; Jonathan Ophir
Visualization of HIFU-induced lesion boundaries by axial-shear strain elastography: a feasibility study.
Ultrasound in medicine & biology 2011;37(3):426-33.
2011: Arun K Thittai; Jose-Miguel Yamal; Louise M Mobbs; Christina M Kraemer-Chant; Srinivasa Chekuri; Brian S Garra; Jonathan Ophir
Axial-shear strain elastography for breast lesion classification: further results from in vivo data.
Ultrasound in medicine & biology 2011;37(2):189-97.
2010: Arun K Thittai; Belfor Galaz; Jonathan Ophir
Importance of axial compression verification to correct interpretation of axial-shear strain elastograms in breast lesions.
Ultrasonic imaging 2010;32(3):190-8.
2010: Arun K Thittai; Belfor Galaz; Jonathan Ophir
Axial-shear strain distributions in an elliptical inclusion model: experimental validation and in vivo examples with implications to breast tumor classification.
Ultrasound in medicine & biology 2010;36(5):814-20.
2008: Arun Thitaikumar; Louise M Mobbs; Christina M Kraemer-Chant; Brian S Garra; Jonathan Ophir
Breast tumor classification using axial shear strain elastography: a feasibility study.
Physics in medicine and biology 2008;53(17):4809-23.
2008: Abhay V Patil; Thomas A Krouskop; Jonathan Ophir; Seshadri Srinivasan
On the differences between two-dimensional and three-dimensional simulations for assessing elastographic image quality: a simulation study.
Ultrasound in medicine & biology 2008;34(7):1129-38.
2007: Raffaella Righetti; Brian S Garra; Louise M Mobbs; Christina M Kraemer-Chant; Jonathan Ophir; Thomas A Krouskop
The feasibility of using poroelastographic techniques for distinguishing between normal and lymphedematous tissues in vivo.
Physics in medicine and biology 2007;52(21):6525-41.
2007: Arun Thitaikumar; Jonathan Ophir
Effect of lesion boundary conditions on axial strain elastograms: a parametric study.
Ultrasound in medicine & biology 2007;33(9):1463-7.
2007: Raffaella Righetti; Mariapaola Righetti; Jonathan Ophir; Thomas A Krouskop
The feasibility of estimating and imaging the mechanical behavior of poroelastic materials using axial strain elastography.
Physics in medicine and biology 2007;52(11):3241-59.
2007: Arun Thitaikumar; Thomas A Krouskop; Brian S Garra; Jonathan Ophir
Visualization of bonding at an inclusion boundary using axial-shear strain elastography: a feasibility study.
Physics in medicine and biology 2007;52(9):2615-33.
2007: Raffaella Righetti; Jonathan Ophir; Arun Thitai Kumar; Thomas A Krouskop
Assessing image quality in effective Poisson's ratio elastography and poroelastography: II.
Physics in medicine and biology 2007;52(5):1321-33.
2007: Raffaella Righetti; Seshadri Srinivasan; Arun Thitai Kumar; Jonathan Ophir; Thomas A Krouskop
Assessing image quality in effective Poisson's ratio elastography and poroelastography: I.
Physics in medicine and biology 2007;52(5):1303-20.
2007: Arun Thitaikumar; Thomas A Krouskop; Jonathan Ophir
Signal-to-noise ratio, contrast-to-noise ratio and their trade-offs with resolution in axial-shear strain elastography.
Physics in medicine and biology 2007;52(1):13-28.
2006: Arun Thitaikumar; Raffaella Righetti; Thomas A Krouskop; Jonathan Ophir
Resolution of axial shear strain elastography.
Physics in medicine and biology 2006;51(20):5245-57.
2006: R Chandrasekhar; Jonathan Ophir; Thomas A Krouskop; K Ophir
Elastographic image quality vs. tissue motion in vivo.
Ultrasound in medicine & biology 2006;32(6):847-55.
2005: Raffaella Righetti; Jonathan Ophir; Brian S Garra; Rajah M Chandrasekhar; Thomas A Krouskop
A new method for generating poroelastograms in noisy environments.
Ultrasonic imaging 2005;27(4):201-20.
2005: Arun Thitai Kumar; Jonathan Ophir; Thomas A Krouskop
Noise performance and signal-to-noise ratio of shear strain elastograms.
Ultrasonic imaging 2005;27(3):145-65.
2005: Raffaella Righetti; Jonathan Ophir; Thomas A Krouskop
A method for generating permeability elastograms and Poisson's ratio time-constant elastograms.
Ultrasound in medicine & biology 2005;31(6):803-16.
2004: Seshadri Srinivasan; Raffaella Righetti; Jonathan Ophir
An experimental characterization of elastographic spatial resolution: analysis of the trade-offs between spatial resolution and contrast-to-noise ratio.
Ultrasound in medicine & biology 2004;30(10):1269-80.
2004: Seshadri Srinivasan; Jonathan Ophir; Kaisar Alam
Theoretical derivation of SNR, CNR and spatial resolution for a local adaptive strain estimator for elastography.
Ultrasound in medicine & biology 2004;30(9):1185-97.
2004: Helene M Langevin; Elisa E Konofagou; Gary J Badger; David L Churchill; James R Fox; Jonathan Ophir; Brian S Garra
Tissue displacements during acupuncture using ultrasound elastography techniques.
Ultrasound in medicine & biology 2004;30(9):1173-83.
2004: S Srinivasan; Thomas A Krouskop; Jonathan Ophir
A quantitative comparison of modulus images obtained using nanoindentation with strain elastograms.
Ultrasound in medicine & biology 2004;30(7):899-918.
2004: Seshadri Srinivasan; Thomas A Krouskop; Jonathan Ophir
Comparing elastographic strain images with modulus images obtained using nanoindentation: preliminary results using phantoms and tissue samples.
Ultrasound in medicine & biology 2004;30(3):329-43.
2004: Raffaella Righetti; Jonathan Ophir; Seshadri Srinivasan; Thomas A Krouskop
The feasibility of using elastography for imaging the Poisson's ratio in porous media.
Ultrasound in medicine & biology 2004;30(2):215-28.
2003: Mehmet Bilgen; Seshadri Srinivasan; Lawrence B Lachman; Jonathan Ophir
Elastography imaging of small animal oncology models: a feasibility study.
Ultrasound in medicine & biology 2003;29(9):1291-6.
2003: Thomas A Krouskop; Pamela S Younes; Seshadri Srinivasan; Thomas Wheeler; Jonathan Ophir
Differences in the compressive stress-strain response of infiltrating ductal carcinomas with and without lobular features--implications for mammography and elastography.
Ultrasonic imaging 2003;25(3):162-70.
2003: Rémi Souchon; Olivier Rouvière; Albert Gelet; Valérie Detti; Seshadri Srinivasan; Jonathan Ophir; Jean-Yves Chapelon
Visualisation of HIFU lesions using elastography of the human prostate in vivo: preliminary results.
Ultrasound in medicine & biology 2003;29(7):1007-15.
2003: Seshadri Srinivasan; Raffaella Righetti; Jonathan Ophir
Trade-offs between the axial resolution and the signal-to-noise ratio in elastography.
Ultrasound in medicine & biology 2003;29(6):847-66.
2003: Raffaella Righetti; Seshadri Srinivasan; Jonathan Ophir
Lateral resolution in elastography.
Ultrasound in medicine & biology 2003;29(5):695-704.
2003: Seshadri Srinivasan; Jonathan Ophir
A zero-crossing strain estimator for elastography.
Ultrasound in medicine & biology 2003;29(2):227-38.
2003: Ernest L Madsen; Gary R Frank; Thomas A Krouskop; Tomy Varghese; Faouzi Kallel; Jonathan Ophir
Tissue-mimicking oil-in-gelatin dispersions for use in heterogeneous elastography phantoms.
Ultrasonic imaging 2003;25(1):17-38.
2002: Seshadri Srinivasan; Faouzi Kallel; Jonathan Ophir
The effects of digitization on the elastographic signal-to-noise ratio.
Ultrasound in medicine & biology 2002;28(11-12):1521-34.
2002: Seshadri Srinivasan; Jonathan Ophir; Kaisar Alam
Elastographic imaging using staggered strain estimates.
Ultrasonic imaging 2002;24(4):229-45.
2002: Rémi Souchon; Lahbib Soualmi; Michel Bertrand; Jean-Yves Chapelon; Faouzi Kallel; Jonathan Ophir
Ultrasonic elastography using sector scan imaging and a radial compression.
Ultrasonics 2002;40(1-8):867-71.
2002: Seshadri Srinivasan; Faouzi Kallel; Rémi Souchon; Jonathan Ophir
Analysis of an adaptive strain estimation technique in elastography.
Ultrasonic imaging 2002;24(2):109-18.
2002: Elisa E Konofagou; Jan D'hooge; Jonathan Ophir
Myocardial elastography--a feasibility study in vivo.
Ultrasound in medicine & biology 2002;28(4):475-82.
2002: Seshadri Srinivasan; Faouzi Kallel; Jonathan Ophir
Estimating the elastographic signal-to-noise ratio using correlation coefficients.
Ultrasound in medicine & biology 2002;28(3):359-68.
2002: Raffaella Righetti; Jonathan Ophir; Periklis Y Ktonas
Axial resolution in elastography.
Ultrasound in medicine & biology 2002;28(1):101-13.
2002: Alex Alaniz; Faouzi Kallel; Ed Hungerford; Jonathan Ophir
Variational method for estimating the effects of continuously varying lenses in HIFU, sonography, and sonography-based cross-correlation methods.
The Journal of the Acoustical Society of America 2002;111(1 Pt 1):468-74.
2001: Tomy Varghese; Jonathan Ophir
Experimental corroboration of the nonstationary strain estimation errors in elastography.
Ultrasound in medicine & biology 2001;27(12):1677-82.
2001: Tomy Varghese; Jonathan Ophir; Elisa E Konofagou; Faouzi Kallel; Raffaella Righetti
Tradeoffs in elastographic imaging.
Ultrasonic imaging 2001;23(4):216-48.
2001: Elisa E Konofagou; Timothy P Harrigan; Jonathan Ophir; Thomas A Krouskop
Poroelastography: imaging the poroelastic properties of tissues.
Ultrasound in medicine & biology 2001;27(10):1387-97.
2001: Faouzi Kallel; C D Prihoda; Jonathan Ophir
Contrast-transfer efficiency for continuously varying tissue moduli: simulation and phantom validation.
Ultrasound in medicine & biology 2001;27(8):1115-25.
2001: Tomy Varghese; Mehmet Bilgen; Jonathan Ophir
Phase aberration effects in elastography.
Ultrasound in medicine & biology 2001;27(6):819-27.
2000: Tomy Varghese; Elisa E Konofagou; Jonathan Ophir; Kaisar Alam; Mehmet Bilgen
Direct strain estimation in elastography using spectral cross-correlation.
Ultrasound in medicine & biology 2000;26(9):1525-37.
2000: Elisa E Konofagou; Tomy Varghese; Jonathan Ophir
Theoretical bounds on the estimation of transverse displacement, transverse strain and Poisson's ratio in elastography.
Ultrasonic imaging 2000;22(3):153-77.
2000: Tomy Varghese; Jonathan Ophir; Thomas A Krouskop
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: Elisa E Konofagou; Jonathan Ophir
Precision estimation and imaging of normal and shear components of the 3D strain tensor in elastography.
Physics in medicine and biology 2000;45(6):1553-63.
2000: Jonathan Ophir; Brian S Garra; Faouzi Kallel; Elisa E Konofagou; Thomas A Krouskop; Raffaella Righetti; Tomy Varghese
Elastographic imaging.
Ultrasound in medicine & biology 2000;26 Suppl 1():S23-9.
2000: Elisa E Konofagou; T Varghese; Jonathan Ophir
Spectral estimators in elastography.
Ultrasonics 2000;38(1-8):412-6.
2000: Elisa E Konofagou; Timothy P Harrigan; Jonathan Ophir
Shear strain estimation and lesion mobility assessment in elastography.
Ultrasonics 2000;38(1-8):400-4.
2000: Kaisar Alam; Jonathan Ophir; Tomy Varghese
Elastographic axial resolution criteria: an experimental study.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2000;47(1):304-9.
2000: Kaisar Alam; Jonathan Ophir
The effect of nonlinear signal transformations on bias errors in elastography.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2000;47(1):297-303.
1999: Elisa E Konofagou; Tomy Varghese; Jonathan Ophir; Kaisar Alam
Power spectral strain estimators in elastography.
Ultrasound in medicine & biology 1999;25(7):1115-29.
1999: Raffaella Righetti; Faouzi Kallel; R Jason Stafford; Roger E Price; Thomas A Krouskop; John D Hazle; Jonathan Ophir
Elastographic characterization of HIFU-induced lesions in canine livers.
Ultrasound in medicine & biology 1999;25(7):1099-113.
1999: Faouzi Kallel; Roger E Price; Elisa E Konofagou; Jonathan Ophir
Elastographic imaging of the normal canine prostate in vitro.
Ultrasonic imaging 1999;21(3):201-15.
1999: Faouzi Kallel; R Jason Stafford; Roger E Price; Raffaella Righetti; Jonathan Ophir; John D Hazle
The feasibility of elastographic visualization of HIFU-induced thermal lesions in soft tissues. Image-guided high-intensity focused ultrasound.
Ultrasound in medicine & biology 1999;25(4):641-7.
1999: Jonathan Ophir; Kaisar Alam; Brian S Garra; Faouzi Kallel; Elisa E Konofagou; Thomas A Krouskop; Tomy Varghese
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.
1999: Tomy Varghese; Jonathan Ophir
A method for experimental characterization of the noise performance of elastographic systems.
Ultrasonic imaging 1999;21(1):17-30.
1998: R Jason Stafford; Faouzi Kallel; Roger E Price; Douglas M Cromeens; Thomas A Krouskop; John D Hazle; Jonathan Ophir
Elastographic imaging of thermal lesions in soft tissue: a preliminary study in vitro.
Ultrasound in medicine & biology 1998;24(9):1449-58.
1998: Faouzi Kallel; Jonathan Ophir
Limits on the contrast of strain concentrations in elastography.
Ultrasound in medicine & biology 1998;24(8):1215-9.
1998: Elisa E Konofagou; Jonathan Ophir
A new elastographic method for estimation and imaging of lateral displacements, lateral strains, corrected axial strains and Poisson's ratios in tissues.
Ultrasound in medicine & biology 1998;24(8):1183-99.
1998: Tomy Varghese; Jonathan Ophir
An analysis of elastographic contrast-to-noise ratio.
Ultrasound in medicine & biology 1998;24(6):915-24.
1998: Tomy Varghese; Jonathan Ophir
Characterization of elastographic noise using the envelope of echo signals.
Ultrasound in medicine & biology 1998;24(4):543-55.
1998: Faouzi Kallel; Jonathan Ophir; K Magee; Thomas A Krouskop
Elastographic imaging of low-contrast elastic modulus distributions in tissue.
Ultrasound in medicine & biology 1998;24(3):409-25.
1998: Kaisar Alam; Jonathan Ophir; I Cespedes; Tomy Varghese
A deconvolution filter for improvement of time-delay estimation in elastography.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 1998;45(6):1565-72.
1998: Kaisar Alam; Jonathan Ophir; Elisa E Konofagou
An adaptive strain estimator for elastography.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 1998;45(2):461-72.
1997: Faouzi Kallel; Jonathan Ophir
A least-squares strain estimator for elastography.
Ultrasonic imaging 1997;19(3):195-208.
1997: Elisa E Konofagou; Jonathan Ophir; Faouzi Kallel; Tomy Varghese
Elastographic dynamic range expansion using variable applied strains.
Ultrasonic imaging 1997;19(2):145-66.
1997: I Cespedes; Jonathan Ophir; Kaisar Alam
The combined effect of signal decorrelation and random noise on the variance of time delay estimation.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 1997;44(1):220-5.
1997: Kaisar Alam; Jonathan Ophir
On the use of envelope and RF signal decorrelation as tissue strain estimators.
Ultrasound in medicine & biology 1997;23(9):1427-33.
1997: Faouzi Kallel; Tomy Varghese; Jonathan Ophir; Mehmet Bilgen
The nonstationary strain filter in elastography: Part II. Lateral and elevational decorrelation.
Ultrasound in medicine & biology 1997;23(9):1357-69.
1997: Tomy Varghese; Jonathan Ophir
The nonstationary strain filter in elastography: Part I. Frequency dependent attenuation.
Ultrasound in medicine & biology 1997;23(9):1343-56.
1997: Kaisar Alam; Jonathan Ophir
Reduction of signal decorrelation from mechanical compression of tissues by temporal stretching: applications to elastography.
Ultrasound in medicine & biology 1997;23(1):95-105.
1997: Brian S Garra; E I Cespedes; Jonathan Ophir; S R Spratt; R A Zuurbier; Colette Magnant; Marie Pennanen
Elastography of breast lesions: initial clinical results.
Radiology 1997;202(1):79-86.
1996: Tomy Varghese; Jonathan Ophir
Performance optimization in elastography: multicompression with temporal stretching.
Ultrasonic imaging 1996;18(3):193-214.
1996: Tomy Varghese; Jonathan Ophir
Estimating tissue strain from signal decorrelation using the correlation coefficient.
Ultrasound in medicine & biology 1996;22(9):1249-54.
1996: Elisa E Konofagou; P Dutta; Jonathan Ophir; I Céspedes
Reduction of stress nonuniformities by apodization of compressor displacement in elastography.
Ultrasound in medicine & biology 1996;22(9):1229-36.
1996: Tomy Varghese; Jonathan Ophir; I Céspedes
Noise reduction in elastograms using temporal stretching with multicompression averaging.
Ultrasound in medicine & biology 1996;22(8):1043-52.
1996: Faouzi Kallel; M Bertrand; Jonathan Ophir
Fundamental limitations on the contrast-transfer efficiency in elastography: an analytic study.
Ultrasound in medicine & biology 1996;22(4):463-70.
1995: I Céspedes; Y Huang; Jonathan Ophir; S Spratt
Methods for estimation of subsample time delays of digitized echo signals.
Ultrasonic imaging 1995;17(2):142-71.
1995: H Ponnekanti; Jonathan Ophir; Y Huang; I Céspedes
Fundamental mechanical limitations on the visualization of elasticity contrast in elastography.
Ultrasound in medicine & biology 1995;21(4):533-43.
1994: Jonathan Ophir; H Ponnekanti; I Cespedes; R K Miller; A D Whittaker
Elastography of beef muscle.
Meat science 1994;36(1-2):239-50.
1994: H Ponnekanti; Jonathan Ophir; I Cespedes
Ultrasonic imaging of the stress distribution in elastic media due to an external compressor.
Ultrasound in medicine & biology 1994;20(1):27-33.
1994: N Belaïd; I Cespedes; Johan M Thijssen; Jonathan Ophir
Lesion detection in simulated elastographic and echographic images: a psychophysical study.
Ultrasound in medicine & biology 1994;20(9):877-91.
1993: I Céspedes; Jonathan Ophir
Reduction of image noise in elastography.
Ultrasonic imaging 1993;15(2):89-102.
1993: I Céspedes; Jonathan Ophir; H Ponnekanti; N Maklad
Elastography: elasticity imaging using ultrasound with application to muscle and breast in vivo.
Ultrasonic imaging 1993;15(2):73-88.
1992: I Céspedes; Jonathan Ophir; Y Huang
On the feasibility of pulse-echo speed of sound estimation in small regions: simulation studies.
Ultrasound in medicine & biology 1992;18(3):283-91.
1992: I Céspedes; Jonathan Ophir
Correction of diffraction errors in attenuation estimation with Dynamic Beam Translation.
Ultrasound in medicine & biology 1992;18(2):213-8.
1992: H Ponnekanti; Jonathan Ophir; I Cespedes
Axial stress distributions between coaxial compressors in elastography: an analytical model.
Ultrasound in medicine & biology 1992;18(8):667-73.
1991: Jonathan Ophir; T Moriya; Youseph Yazdi
A single transducer transaxial compression technique for the estimation of sound speed in biological tissues.
Ultrasonic imaging 1991;13(3):269-79.
1991: Jonathan Ophir; I Céspedes; H Ponnekanti; Youseph Yazdi; X Li
Elastography: a quantitative method for imaging the elasticity of biological tissues.
Ultrasonic imaging 1991;13(2):111-34.
1990: I Céspedes; Jonathan Ophir
Diffraction correction methods for pulse-echo acoustic attenuation estimation.
Ultrasound in medicine & biology 1990;16(7):707-17.
1990: Jonathan Ophir; Youseph Yazdi
A transaxial compression technique (TACT) for localized pulse-echo estimation of sound speed in biological tissues.
Ultrasonic imaging 1990;12(1):35-46.
1989: Jonathan Ophir; W Johnson; Youseph Yazdi; D Shattuck; D Mehta
Correlation artifacts in speed of sound estimation in scattering media.
Ultrasound in medicine & biology 1989;15(4):341-53.
1989: D P Shattuck; Jonathan Ophir; G W Johnson; Youseph Yazdi; D Mehta
Correction of refraction and other angle errors in beam tracking speed of sound estimations using multiple tracking transducers.
Ultrasound in medicine & biology 1989;15(7):673-81.
1989: Jonathan Ophir; K J Parker
Contrast agents in diagnostic ultrasound.
Ultrasound in medicine & biology 1989;15(4):319-33.
1988: Jonathan Ophir; D Mehta
Elimination of diffraction error in acoustic attenuation estimation via axial beam translation.
Ultrasonic imaging 1988;10(2):139-52.
1988: T Lin; Jonathan Ophir; G Potter
Correlation of ultrasonic attenuation with pathologic fat and fibrosis in liver disease.
Ultrasound in medicine & biology 1988;14(8):729-34.
1987: T Lin; Jonathan Ophir; G Potter
Frequency-dependent ultrasonic differentiation of normal and diffusely diseased liver.
The Journal of the Acoustical Society of America 1987;82(4):1131-8.
1987: T Lin; Jonathan Ophir; G Potter
Correlations of sound speed with tissue constituents in normal and diffuse liver disease.
Ultrasonic imaging 1987;9(1):29-40.