A 1 MHz multielement curved transducers for transskull imaging
A 1 MHz multielement curved transducers for transskull imaging
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用于跨颅成像的 1 MHz 多元件弯曲换能器
DOI：
10.1109/ultsym.1991.234103
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Z.D. Qin
中科院分区：
文献类型：
--
作者：
J. Ylitalo;T. Hanhineva;P. Kekkonen;Z.D. Qin
研制了一种压电多元换能器。原型换能器具有弯曲形状，成像半径为200 mm。换能器尺寸为65 mm × 13 mm，由16个元件组成。执行换能器元件的电扫描，使得在相邻元件之间获得虚拟元件。因此，换能器充当31元件阵列。每个元件独立地发射和接收超声波。因此，在图像平面的方向上实现宽波束声穿透。在垂直于图像平面的方向上，超声波束由透镜聚焦。该阵列已连接到一台微型计算机进行初步成像测试。介绍了该传感器的结构和对点状测试对象成像的结果。<<ETX>>
A piezoelectric multielement transducer was developed and constructed. The prototype transducer has a curved shape with an imaging radius of 200 mm. The transducer dimensions are 65 mm by 13 mm, and it consists of 16 elements. The electrical scanning of the transducer elements is performed so that a virtual element is obtained in between the adjacent elements. Thus, the transducer acts as a 31-element array. Each element transmits and receives ultrasound independently. Accordingly wide beam insonification is achieved in the direction of the image plane. In the direction normal to the image plane the ultrasonic beam is focused by a lens. The array has been connected to a microcomputer for initial imaging tests. The structure of the transducer and the results from imaging of a pointlike test object are presented.<<ETX>>