On the use of envelope and rf signal decorrelation as tissue strain estimators
On the use of envelope and rf signal decorrelation as tissue strain estimators
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DOI：
10.1016/s0301-5629(97)00186-5
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发表时间：
1997-01-01
影响因子：
2.9
通讯作者：
Ophir, J
中科院分区：
文献类型：
--
作者：
Alam, SK;Ophir, J
Bamber和Bush（1995）将相关系数用于手绘弹性成像，Varghese和Ophir（1996）发现它是应变的偏差估计，具有很大的可变性。在本研究中，我们系统地研究了各种系统参数和处理参数的变化对相关系数应变估计器性能的影响，并通过模拟数据证明了噪声和频率相关衰减会在该估计器中引入可变偏置。(C) 1997年世界超声医学和生物学联合会。
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.