IEEE Trans Ultrason Ferroelectr Freq Control. 2018 Aug;65(8):1415-1422. doi: 10.1109/TUFFC.2018.2838566. Epub 2018 May 21.
Prototypes of a PZT-based ultrasound needle-actuating device have shown the ability to reduce needle penetration force and enhance needle visibility with color Doppler imaging during needle insertion for tissue biopsy and regional anesthesia. However, the demand for smaller, lighter devices and the need for high performance transducers have motivated investigation of a different configuration of needle-actuation transducer, utilizing the -mode of PZT4 piezoceramic, and exploration of further improvement in its performance using relaxor-type piezocrystal. This paper outlines the development of the -mode needle actuation transducer design from simulation to fabrication and demonstration. Full characterization was performed on transducers for performance comparison. The performance of the proposed smaller, lighter -mode transducer is comparable with that of previous -mode transducers. Furthermore, it has been found to be much more efficient when using PMN-PT piezocrystal rather than piezoceramic.
基于 PZT 的超声针驱动装置原型已显示出在进行组织活检和区域麻醉的针插入过程中，具有降低针穿透力和增强彩色多普勒成像中针可视性的能力。然而，对更小、更轻的设备的需求以及对高性能换能器的需求，促使人们研究一种不同配置的针驱动换能器，利用 PZT4 压电陶瓷的 -模式，并利用弛豫型压电晶体进一步提高其性能。本文概述了从模拟到制造和演示的 -模式针驱动换能器设计的开发。对换能器进行了全面的特性测试，以进行性能比较。所提出的更小、更轻的 -模式换能器的性能与之前的 -模式换能器相当。此外，当使用 PMN-PT 压电晶体而不是压电陶瓷时，它被发现效率更高。
