3-D companding using linear arrays for improved strain imaging
- 23 November 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 2 (10510117) , 1435-1438
- https://doi.org/10.1109/ultsym.1997.661847
Abstract
Three-dimensional (3-D) companding is applied to volume sets of RF echo signals to reduce decorrelation noise in strain images. Companding conditions echo signals to be cross-correlated to improve coherence and minimize decorrelation noise caused by complex 3-D motion. Previously, the authors showed that 2-D companding was able to eliminate decorrelation noise in strain images up to 50% compression if the out-of-plane displacement was negligible. This paper extends those methods to three dimensions, thus reducing the need to control boundary conditions. 3-D companding is also limited at high compressions (>5%) because of high strain gradients and rotation and shearing motions. A series of phantom studies illustrate the advantages and limitation of 3-D companding with and without aberrating layers.Keywords
This publication has 5 references indexed in Scilit:
- Lagrangian speckle model and tissue-motion estimation-theory [ultrasonography]IEEE Transactions on Medical Imaging, 1999
- 2-D companding for noise reduction in strain imagingIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1998
- Error analysis in acoustic elastography. I. Displacement estimationThe Journal of the Acoustical Society of America, 1997
- A Model For Dynamic Texture Analysis In Two-Dimensional Echocardiograms Of The MyocardiumPublished by SPIE-Intl Soc Optical Eng ,1987
- Estimation of time delay in the presence of source or receiver motionThe Journal of the Acoustical Society of America, 1977