Methods for dynamic range expansion and enhancement of the signal-to-noise ratio in elastography

E.E. Konofagou, S.K. Alam, J. Ophir, T. Krouskop
1997 IEEE Ultrasonics Symposium Proceedings. An International Symposium (Cat. No.97CH36118)  
Two methods are discussed to increase the dynamic range and enhance the signal-to-noise ratio in elastography (SNR,). One method uses variable applied strains to expand the elastographic dynamic range by selecting the strain estimates with the highest SNR, out of a multitude of strain estimates. The second one is a completely new estimator that estimates the strain by an iterative temporal stretching algorithm of the windowed postcompression RF echo signal. We examine these methods using 2D
more » ... te element simulations and resulting experimental strain filters. Finally, the combination of these two methods is shown to produce an elastogram with higher dynamic range as well as S N k .
doi:10.1109/ultsym.1997.661783 fatcat:zsffxwpyqzaq7lmplltqjzgabe