用于自由臂三维重建的换能器阵列指向性研究  

Research on directicity of transducer array for freehand 3D ultrasound reconstruction

作　　者：陈新[1] 陈后金[1] 彭亚辉[1] 李居朋[1] CHEN Xin;CHEN Houjin;PENG Yahui;LI Jupeng(Electronic Information Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《北京交通大学学报》2023年第2期147-158,共12页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金(61872030,61771039,62172029);中央高校基本科研业务费专项资金(KWJB16043536)。

摘　　要：使用超声探头进行自由臂三维重建时,手持超声探头的换能器阵列形式会对探头的指向性产生影响.根据声波叠加原理,结合手持超声探头的尺寸范围,从单个阵元的指向性问题入手,推导了线阵、凸阵和面阵三种自由臂三维重建常用的换能器阵列形式的声压表达式.提出一种适合手持超声探头的指向性评价方法,通过调整换能器阵列的相关参数,计算出当前的各项指向性指标.最后通过改变换能器阵元的尺寸、数量、间距、排列方式等参数,对评价方法做了大量的测试,分析和对比相同参数下不同阵列形式的指向性,找到一种适合在自由臂三维重建的线阵超声换能器阵列,对自由臂三维重建的研究提供了参考.When using an ultrasonic probe for freehand 3D reconstruction,the form of the transducer array affects the directivity of the probe.The paper starts with the directivity of a single array element.According to the sound wave superposition principle and the size of the handheld ultrasonic probe,the sound pressure expression is derived for three different array forms,including linear,curvilinear,and 2-dimensional arrays.Then,a directivity evaluation method suitable for handheld ultrasonic probes is proposed.The directivity is calculated for different transducer array parameters.By changing the size,number,spacing,arrangement and other parameters of the transducer array elements,the paper evaluates the proposed method in several experiments.By comparing the directivity of various array forms under the same parameters,a linear array ultrasonic transducer array is found suitable for freehand 3D reconstruction,which provides a reference for 3-dimensional freehand ultrasound image reconstruction.

关 键 词：换能器阵列 阵列形式 指向性 三维重建 评价方法 

分 类 号：TB552[理学—物理]