Micromachined PIN-PMN-PT Crystal Composite Transducer for High-Frequency Intravascular Ultrasound (IVUS) Imaging

被引:56
作者
Li, Xiang [1 ]
Ma, Teng [1 ]
Tian, Jian [2 ]
Han, Pengdi [2 ]
Zhou, Qifa [1 ]
Shung, K. Kirk [1 ]
机构
[1] Univ So Calif, Dept Biomed Engn, NIH Resource Med Ultrason Transducer Technol, Los Angeles, CA 90089 USA
[2] HC Mat Corp, Bolingbrook, IL USA
关键词
SINGLE-CRYSTAL; FABRICATION; DESIGN; PLAQUE;
D O I
10.1109/TUFFC.2014.3016
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
In this paper, we report the use of micromachined PbIn1/2Nb1/2O3-PbMg1/3Nb2/3O3-PbTiO3 (PIN-PMN-PT) single crystal 1-3 composite material for intravascular ultrasound (IVUS) imaging application. The effective electromechanical coupling coefficient k(t(eff)) of the composite was measured to be 0.75 to 0.78. Acoustic impedance was estimated to be 20 MRayl. Based on the composite, needle-type and flexible-type IVUS transducers were fabricated. The composite transducer achieved an 86% bandwidth at the center frequency of 41 MHz, which resulted in a 43 mu m axial resolution. Ex vivo IVUS imaging was conducted to demonstrate the improvement of axial resolution. The composite transducer was capable of identifying the three layers of a cadaver coronary artery specimen with high resolution. The PIN-PMN-PT-based composite has superior piezoelectric properties comparable to PMN-PT-based composite and its thermal stability is higher than PMN-PT. PIN-PMN-PT crystal can be an alternative approach for fabricating high-frequency composite, instead of using PMN-PT.
引用
收藏
页码:1171 / 1178
页数:8
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