An ultrasonic transducer apodized by polarization

K. Kawabe, Y. Hara, K. Watanabe, T. Shimura
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引用次数: 5

Abstract

In attempting to improve the quality of images produced by ultrasonic diagnostic equipment, the authors tried to narrow the width of the ultrasound beam in the scanning direction and the short axis perpendicular to the scanning direction, and to shorten the pulse duration. The beamwidth, especially in the short axis, is markedly broad. To narrow the width, the transmitting acoustic sound pressure was apodized by polarizing the piezoelectric ceramic element of an array-type transducer in a stepped manner. A transducer using this apodization had its beamwidth decreased from 50% to 80% compared to the conventional transducer.<>
一种利用极化技术的超声波换能器
为了提高超声诊断设备的成像质量,作者试图缩小超声光束在扫描方向的宽度和垂直于扫描方向的短轴,缩短脉冲持续时间。波束宽度,特别是在短轴上,明显地很宽。通过对阵列式换能器的压电陶瓷元件进行阶梯式极化,使透射声的声压变窄。与传统的换能器相比,使用这种apodiization的换能器的波束宽度从50%降低到80%。
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