基于环形阵列的定量超声背向散射综合特性分析：均匀散射体模的基础研究
Comprehensive backscattering characteristics analysis for quantitative ultrasound with an annular array: a basic study on homogeneous scattering phantom.
作者信息
Mizoguchi Takeru, Tamura Kazuki, Mamou Jonathan, Ketterling Jeffrey A, Yoshida Kenji, Yamaguchi Tadashi
机构信息
Graduate School of Science and Engineering, Chiba University, Yayoicho, Inage, Chiba 263-8522, Japan.
Graduate School of Engineering, Chiba University, Yayoicho, Inage, Chiba 263-8522, Japan.
出版信息
Jpn J Appl Phys (2008). 2019 Jul;58(SG). doi: 10.7567/1347-4065/ab0df9. Epub 2019 Jun 13.
High-frequency ultrasound (HFU, >20 MHz) and quantitative ultrasound (QUS) methods permit a means to understand the relationship between anatomical and acoustic characteristics. In our previous research, we showed that analyzing the acoustic scattering with HFU was an effective method for noninvasive diagnosis. However, the depth of field (DOF) of HFU transducers was limited, which constrains the range of QUS analysis. In this study, we seek to improve the accuracy of HFU, QUS-based parameters on the envelope statistics and frequency-based analysis by using an annular array that allows for an extended DOF. A 20-MHz annular-array transducer with five elements was employed to obtain signals which were beamformed in post-processing. Two kinds of low concentration scattering phantoms were scanned with 30-m step size. Two QUS analysis techniques were employed: the Nakagami distribution and the reflector method. The results demonstrated that the annular array provides a stable analysis over an extended axial range.
高频超声（HFU，>20 MHz）和定量超声（QUS）方法提供了一种理解解剖学和声学特征之间关系的手段。在我们之前的研究中，我们表明用高频超声分析声学散射是一种有效的非侵入性诊断方法。然而，高频超声换能器的景深（DOF）有限，这限制了定量超声分析的范围。在本研究中，我们试图通过使用允许扩展景深的环形阵列来提高基于高频超声、定量超声的包络统计和基于频率分析的参数的准确性。采用具有五个元件的20 MHz环形阵列换能器来获取信号，这些信号在后期处理中进行波束形成。用30米的步长扫描两种低浓度散射体模。采用了两种定量超声分析技术：Nakagami分布和反射体方法。结果表明，环形阵列在扩展的轴向范围内提供了稳定的分析。
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