Application of low-complexity generalized coherence factor to in vivo data
Application of low-complexity generalized coherence factor to in vivo data
复制标题
低复杂度广义相干因子在体内数据中的应用
DOI：
10.1007/s10396-022-01243-1
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发表时间：
2022
影响因子：
1.8
通讯作者：
Kanai Hiroshi
中科院分区：
文献类型：
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作者：
Hisatsu Masanori;Mori Shohei;Arakawa Mototaka;Kanai Hiroshi
使用广义相干因子（GCF）的波束形成可以减少旁瓣伪影，并提供良好的对比度噪声比。我们先前提出了GCFreal，一种计算GCF而不生成分析信号的方法，以及GCFbin，一种通过二进制化接收信号来计算GCF的方法。在这项研究中，我们应用这些方法在体内的数据和对比performance.MethodsChannel RF数据的计算复杂性降低的效果，从人体肝脏和胆囊获得。我们在每个数据集中设置了几个观测点，并研究了导致基于信号及其功率谱的方法之间的对比度性能差异的机制。然而，当在不同通道上接收来自焦点或来自焦点外的信号时，GCF bin与GCF存在较大差异。这是因为具有高相干性的信号的幅度和具有低相干性的信号的幅度通过二值化的signals.ConclusionWhile GCFbin可以显着降低计算复杂度，有差异的值GCFbinandGCF由于二值化的接收信号。然而，这种差异导致GCF bin在伪影减少方面优于GCF上级。这是由于GCF bin中的幅度信息被消除，这使得它成为一种新的有效的相干因子，具有不同于GCF的特性。
PurposeBeamforming using the generalized coherence factor (GCF) reduces sidelobe artifacts and provides an excellent contrast-to-noise ratio. We previously proposed GCFreal, a method to calculate GCF without generating analytic signals, and GCFbin, a method to calculate GCF by binarizing the received signals. In this study, we applied these methods to in vivo data and showed the effect of the computational complexity reduction on contrast performance.MethodsChannel RF data were acquired from the human liver and gallbladder. We set up several observation points in each data set and investigated the mechanism that causes the differences in contrast performance among the methods based on the signals and their power spectra in the channel direction.ResultsFor GCF and GCFreal, the obtained values were almost the same. However, there were large differences in GCFbinfrom GCF when the signals from the focus point or from outside the focus point were received on different channels. This is because the amplitudes of the signals with high coherence and those with low coherence were changed by binarizing the signals.ConclusionWhile GCFbincan significantly reduce the computational complexity, there are differences in the values of GCFbinand GCF due to binarizing of the received signals. However, this difference resulted in GCFbinbeing superior to GCF in terms of artifact reduction. This is owing to the elimination of amplitude information in GCFbin, which makes it a new efficient coherence factor with different characteristics from GCF.
DOI：
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发表时间：
1996
期刊：
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
影响因子：
--
作者：
Hiroshi Kanai;Michie Sato;Y. Koiwa;N. Chubachi
通讯作者：
N. Chubachi