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, we showed that 2-D companding was able to eliminate decorrelation noise in strain images up to 5% 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.
Original language | English (US) |
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Pages (from-to) | 1435-1438 |
Number of pages | 4 |
Journal | Proceedings of the IEEE Ultrasonics Symposium |
Volume | 2 |
State | Published - Dec 1 1997 |
Externally published | Yes |
Event | Proceedings of the 1997 IEEE Ultrasonics Symposium. Part 1 (of 2) - Toronto, Can Duration: Oct 5 1997 → Oct 8 1997 |
ASJC Scopus subject areas
- Acoustics and Ultrasonics