40-MHZ MICROMACHINED PMN-PT COMPOSITE ULTRASOUND ARRAY FOR MEDICAL IMAGING

被引：0

作者：

Li, Sibo ^{[1
]}

Huang, Wenbin ^{[1
]}

Chang, Wei-Yi ^{[1
]}

Jiang, Xiaoning ^{[1
]}

机构：

[1] North Carolina State Univ, Raleigh, NC 27695 USA

来源：

PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, 2015, VOL 3 | 2016年

关键词：

PC-MUT; TRANSDUCERS; MHZ;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Ultrasonography is well known as a relatively low cost and non-invasive modality for real-time imaging. In recent years, various high frequency array transducers have been developed and used for ophthalmology, dermatology, and small animal studies. This paper reports the development of a 48 element 40-MHz ultrasonic array using micromachined lead magnesium niobate-lead titanate (PMN-PT) single crystal 1-3 composite material. Array elements with a pitch of 100-micron were interconnected via a customized flexible circuit. Pulse-echo test showed an average center frequency of 40 MHz and a -6 dB fractional bandwidth of 52%. The -20 dB pulse length was evaluated as 120 ns. The electrical and acoustical separation showed the crosstalk less than-24 dB. An image of a steel wire target phantom was acquired by stacking multiple A-lines. The results demonstrate resolutions exceeding 70 gm axially and 800 gm laterally. Those results imply the great potential of the developed array transducer for the high frequency medical imaging.

引用

页数：6