A theoretical framework for performance characterization of elastography: The strain filter

被引:267
作者
Varghese, T
Ophir, J
机构
[1] Ultrasonics Laboratory, Department of Radiology, University of Texas Medical School, Houston
基金
美国国家卫生研究院;
关键词
D O I
10.1109/58.585212
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
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. An upper bound on the performance of the strain estimator in elastography is obtained from a strain filter constructed using these limits. The strain filter is a term used to describe the nonlinear filtering process in the strain domain (due to the ultrasound system and signal processing parameters) that allows the elastographic depiction of a limited range of strains from the compressed tissue. The strain filter predicts the elastogram quality by specifying the elastographic signal-to-noise ratio (SNR(e)), sensitivity, and the strain dynamic range at a given resolution. The dynamic range is limited by decorrelation errors for large tissue strain values, and electronic noise for low strain values. Tradeoffs between different techniques used to enhance elastogram image quality may also be analyzed using the strain filter.
引用
收藏
页码:164 / 172
页数:9
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