Design of a multilaver transducer for acoustic bladder volume assessment
Design of a multilaver transducer for acoustic bladder volume assessment
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DOI：
10.1109/tuffc.2006.106
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发表时间：
2006-10-01
影响因子：
3.6
通讯作者：
de Jong, Nico
中科院分区：
文献类型：
--
作者：
Merks, Egon J. W.;Bouakaz, Ayache;de Jong, Nico
导尿仍然是膀胱容量评估的“金标准”，但它是侵入性的，并引入了感染和创伤的风险。因此，无创膀胱容量测量方法引起了人们的兴趣。在之前的研究中，我们验证了一种基于非线性超声传播的膀胱体积测量新技术。本文描述了实现该方法的专用多层换能器的第一个原型。它由用于传输的PZT换能器和用于接收的PVDF层组成。水箱中的声学测量和模拟测量表明，膀胱体积与膀胱后感兴趣区域回波的谐波含量之间存在关系。基于荷航电路模型的等效换能器模型仿真结果与声学测量结果吻合较好。实验结果证明了基于非线性波传播的多层膀胱容积传感器设计的可行性。
Catheterization remains the "gold standard" for bladder volume assessment, but it is invasive and introduces the risk of infections and traumas. Therefore, noninvasive bladder volume measurement methods have gained interest. In a preceding study a new technique to measure the bladder volume on the basis of nonlinear ultrasound wave propagation was validated. This paper describes a first prototype of a dedicated multilayer transducer to implement this approach. It is composed of a PZT transducer for transmission and a PVDF layer for reception. Acoustical measurements in a water tank and phantom measurements showed that there is a relation between bladder volume and the harmonic contents of the echo obtained from a region of interest behind the bladder. Simulations with an equivalent transducer model on the basis of KLM-circuit modeling closely matched with the results from the acoustical measurements. The results demonstrated the feasibility of the multilayer transducer design for bladder volume assessment on the basis of nonlinear wave propagation.