Lee Warren, Smith Stephen W
Department of Biomedical Engineering, Duke University, Durham, NC 27708-0281, USA.
IEEE Trans Ultrason Ferroelectr Freq Control. 2002 Apr;49(4):415-25. doi: 10.1109/58.996559.
The design, fabrication, and characterization of a 7 MHz, two-dimensional (2-D) array transducer built on a silicon substrate is described. The array fits inside a 9-French (2.9 mm O.D.) catheter for use in real-time intracardiac volumetric imaging. The -6 dB fractional bandwidth of the transducer is 30%, the 50 ohm pitch-catch insertion loss is 78 dB, and the interelement crosstalk is -25 dB. Real-time volumetric images in phantoms and in-vitro images of a sheep heart have been acquired yielding measured spatial resolution of 2 mm at a depth of 1 cm. The cardiac structures imaged include ventricular chambers, interventricular septum, mitral and tricuspid valves and real-time 3-D rendered volumes of the tricuspid valve in the open and closed position.
本文描述了一种基于硅基衬底构建的7兆赫兹二维（2-D）阵列换能器的设计、制造与特性。该阵列可装入一根9法式（外径2.9毫米）的导管内，用于实时心内容积成像。换能器的-6分贝分数带宽为30%，50欧姆的脉冲回波插入损耗为78分贝，阵元间串扰为-25分贝。已采集到仿体中的实时容积图像以及绵羊心脏的体外图像，在1厘米深度处测得的空间分辨率为2毫米。所成像的心脏结构包括心室腔、室间隔、二尖瓣和三尖瓣，以及处于开放和关闭位置的三尖瓣的实时三维渲染容积。
