Ultrasonic Reverberation Clutter Suppression Using Multiphase Apodization With Cross Correlation.
Ultrasonic Reverberation Clutter Suppression Using Multiphase Apodization With Cross Correlation.
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DOI：
10.1109/tuffc.2016.2597124
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发表时间：
2016-11
期刊：
影响因子：
--
通讯作者：
Yen JT
中科院分区：
文献类型：
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作者：
Shin J;Chen Y;Malhi H;Yen JT
尽管最近在医学超声成像方面取得了许多进展，但来自近场解剖结构（诸如腹壁、肋骨和组织层）的混响杂波是超声图像质量劣化的主要来源之一。混响杂波信号是不期望的回波，其作为声波在这些结构的边界之间的多次反射的结果而出现，并且导致填充以降低图像对比度。为了减轻不希望的混响杂波的影响，本文提出了一种新的波束形成技术称为多相切趾与互相关（MPAX），这是我们以前的技术，DAX的改进版本。DAX使用单对互补幅度变迹，而MPAX利用多对互补正弦相位变迹来有意地引入栅瓣，从栅瓣可以产生改进的加权矩阵以有效地抑制混响杂波。我们的实验海绵体和初步的人体实验结果表明，MPAX是一种非常有效的技术，在抑制混响杂波，并具有很大的潜力，产生高对比度的超声图像，更准确的诊断在临床上。
Despite numerous recent advances in medical ultrasound imaging, reverberation clutter from near-field anatomical structures, such as the abdominal wall, ribs, and tissue layers, is one of the major sources of ultrasound image quality degradation. Reverberation clutter signals are undesirable echoes, which arise as a result of multiple reflections of acoustic waves between the boundaries of these structures, and cause fill-in to lower image contrast. In order to mitigate the undesirable reverberation clutter effects, we present in this paper a new beamforming technique called multi-phase apodization with cross-correlation (MPAX), which is an improved version of our previous technique, DAX. While DAX uses a single pair of complementary amplitude apodizations, MPAX utilizes multiple pairs of complementary sinusoidal phase apodizations to intentionally introduce grating lobes from which an improved weighting matrix can be produced to effectively suppress reverberation clutter. Our experimental sponge phantom and preliminary in vivo results from human subjects presented in this work suggest that MPAX is a highly effective technique in suppressing reverberation clutter and has great potential for producing high contrast ultrasound images for more accurate diagnosis in clinics.