Title :
5B-5 Multi-Layered PMN-PT Single Crystal/Polymer Composite 96ch Phased Array for Medical Ultrasound Imaging
Author :
Rhim, Sung Min ; Jung, Ho ; Lee, Jong Mock
Author_Institution :
Humanscan Co. Ltd., Kyunggi-do
Abstract :
The performance of 3.5 MHz/96ch 0.2mm pitch phased array using multi-layered PMN-PT single crystal/polymer composites was investigated. The bandwidth of multi-layered PMN-PT/polymer composites phased array is about 120% and this is about 50% broader than that of PZT ceramics probe. And sensitivity of multilayer PMN-PT/polymer composites phased array is about 6dB higher than that of PZT ceramics. Because of low acoustical cross-talk, the measured directivity of multi-layered PMN-PT/polymer composites phased array is almost 100% with respect to theoretical value using CW theory. The variation range of sensitivity between element to element is about 3dB and this is almost same with PZT ceramic probe. The average sensitivity variation between lot to lot of multilayered PMN-PT/polymer phased array is about 2dB
Keywords :
biomedical ultrasonics; composite materials; lead compounds; polymer blends; 3.5 MHz; 96ch phased array; PZT ceramics; acoustical cross-talk; directivity; medical ultrasound imaging; multilayered PMN-PT single crystal-polymer composite; Acoustic measurements; Bandwidth; Bioceramics; Biomedical imaging; Ceramics; Nonhomogeneous media; Phased arrays; Polymers; Probes; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 2006. IEEE
Conference_Location :
Vancouver, BC
Print_ISBN :
1-4244-0201-8
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2006.55
