On the use of envelope and rf signal decorrelation as tissue strain estimators

被引：28
作者：
Alam, SK
Ophir, J
机构：
[1] Ultrasonics Laboratory, Radiology Department, University of Texas Medical School, Houston
[2] Ultrasonics Laboratory, Radiology Department, University of Texas Medical School, Houston, TX 77030
来源：
ULTRASOUND IN MEDICINE AND BIOLOGY | 1997年 / 23卷 / 09期
关键词：
bias; decorrelation; elastography; frequency-dependent attenuation; imaging; precision; PSF; SNR; strain; ultrasound; window size;
D O I：
10.1016/S0301-5629(97)00186-5
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Bamber and Bush (1995) used the correlation coefficient for freehand elasticity imaging, Varghese and Ophir (1996) found it to be a biased estimator of strain with a large variability. In this study, we systematically investigate the effect of changes in various system and processing parameters on the performance of the correlation coefficient strain estimator, and demonstrate, using simulated data, that noise and frequency-dependent attenuation can introduce variable bias in this estimator. (C) 1997 World Federation for Ultrasound in Medicine & Biology.
引用
收藏
页码：1427 / 1433
页数：7
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