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Elastography: A Quantitative Method for Imaging the Elasticity of Biological Tissues
- J. Ophir, I. Céspedes, H. Ponnekanti, Y. Yazdi, X. Li
- Materials Science, Medicine
- Ultrasonic imaging
- 1 April 1991
We describe a new method for quantitative imaging of strain and elastic modulus distributions in soft tissues. The method is based on external tissue compression, with subsequent computation of the… Expand
Elastography: Ultrasonic estimation and imaging of the elastic properties of tissues
- J. Ophir, S. Alam, +4 authors T. Varghese
- Materials Science, Medicine
- Proceedings of the Institution of Mechanical…
- 1 March 1999
Abstract The basic principles of using sonographic techniques for imaging the elastic properties of tissues are described, with particular emphasis on elastography. After some preliminaries that… Expand
A Least-Squares Strain Estimator for Elastography
A least-squares strain estimator (LSQSE) for elastography is proposed. It is shown that with such an estimator, the signal-to-noise ratio in an elastogram (SNRe ) is significantly improved. This… Expand
A theoretical framework for performance characterization of elastography: the strain filter
- T. Varghese, J. Ophir
- Computer Science, Medicine
- IEEE Transactions on Ultrasonics, Ferroelectrics…
This paper presents a theoretical framework for performance characterization in strain estimation, which includes the effect of signal decorrelation, quantization errors due to the finite temporal sampling rate, and electronic noise. Expand
Elastography of breast lesions: initial clinical results.
PURPOSE To determine the appearance of various breast lesions on elastograms and to explore the potential of elastography in the diagnosis of breast lesions. MATERIALS AND METHODS A total of 46… Expand
Methods for Estimation of Subsample Time Delays of Digitized Echo Signals
Time delay estimation (TDE) is commonly performed in practice by crosscorrelation of digitized echo signals. Since time delays are generally not integral multiples of the sampling period, the… Expand
A new elastographic method for estimation and imaging of lateral displacements, lateral strains, corrected axial strains and Poisson's ratios in tissues.
A major disadvantage of the current practice of elastography is that only the axial component of the strain is estimated. The lateral and elevational components are basically disregarded, yet they… Expand
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
This page shows some examples of multimedia files. It is also available at: http://www.ieee-uffc.org/tr/mexample.pdf. For submission of multimedia manuscripts to TUFFC, please follow “Information for… Expand
Reduction of Image Noise in Elastography
Elastography is a method for imaging the elastic properties of compliant tissues which produces gray scale elasticity images called elastograms. The elastograms of phantoms with homogeneous elastic… Expand
Elastographic characterization of HIFU-induced lesions in canine livers.
The elastographic visualization and evaluation of high-intensity focused ultrasound (HIFU)-induced lesions were investigated. The lesions were induced in vitro in freshly excised canine livers. The… Expand