Investigation of feasibility of singular value decomposition clutter filter in plane wave imaging with packet transmission sequence
Investigation of feasibility of singular value decomposition clutter filter in plane wave imaging with packet transmission sequence
复制标题
DOI：
10.1007/s10396-020-01067-x
复制
发表时间：
2021-01-09
影响因子：
1.8
通讯作者：
Saito, Kozue
中科院分区：
文献类型：
--
作者：
Hasegawa, Hideyuki;Nagaoka, Ryo;Saito, Kozue
目的评价血流是超声诊断成像的重要功能。彩色血流成像是一种广泛用于临床的方法。由于自相关会受到混叠的影响，因此超声脉冲的连续传输之间的时间间隔应尽可能短。为此，在彩色血流成像中广泛使用特定的发送-接收序列，即分组传输。此外，最近引入超声成像的平面波成像显著有助于时间分辨率的提高。此外，据报道，奇异值分解（SVD）杂波滤波器优于传统的杂波滤波器。研究了采用分组传输序列对平面波成像进行SVD杂波滤波的可行性.方法在本研究中，通过在改变转向角之前向同一方向多次发送平面波，实现了分组传输序列在平面波成像中的应用.在第一种策略中，像传统的彩色血流成像与使用聚焦发射波束的逐行采集一样，杂波滤波器被应用于每个包中的超声射频（RF）信号。在第二种策略中，每个数据包的传输次数设置为2，结果采用SVD滤波器的第二种方法比采用多项式回归滤波器的第一种方法具有更好的滤波性能。结论在采用分组传输序列的平面波成像中，SVD杂波滤波器是可行的，并且通过将每个分组的传输次数限制为两次来提高性能。
Purpose Assessment of blood flow is an important function in diagnostic ultrasound imaging. Color flow imaging is one such method widely used in the clinical setting. Since autocorrelation suffers from aliasing, the time interval between successive transmissions of ultrasonic pulses should be as short as possible. For this purpose, a specific transmit-receive sequence, namely, packet transmission, is widely used in color flow imaging. Also, plane wave imaging recently introduced to ultrasound imaging significantly contributes to improvement of the temporal resolution. Furthermore, a singular value decomposition (SVD) clutter filter reportedly outperforms a conventional clutter filter. In the present study, the feasibility of the SVD clutter filter in plane wave imaging with the packet transmission sequence was investigated.Method In the present study, the packet transmission sequence was implemented in plane wave imaging by sending plane waves multiple times in the same direction before changing the steering angle. In the first strategy, like conventional color flow imaging with line-by-line acquisition using a focused transmit beam, a clutter filter was applied to ultrasonic radio-frequency (RF) signals in each packet. In the second strategy, the number of transmissions per packet was set at two, and a clutter filter was applied to RF signals obtained from the first or second transmission in different packets.Results The in vivo experimental results on a human carotid artery showed that the second strategy with an SVD filter realized significantly better performance than the first strategy with a polynomial regression filter used as a conventional filter.Conclusion An SVD clutter filter was feasible in plane wave imaging with the packet transmission sequence, and the performance was improved by limiting the number of transmissions per packet to two.