Light E D, Davidsen R E, Fiering J O, Hruschka T A, Smith S W
Department of Biomedical Engineering, Duke University, Durham, NC 27708-0281, USA.
Ultrason Imaging. 1998 Jan;20(1):1-15. doi: 10.1177/016173469802000101.
The design, fabrication, and evaluation of two dimensional array transducers for real-time volumetric imaging are described. The transducers we have previously described operated at frequencies below 3 MHz and were unwieldy to the operator because of the interconnect schemes used in connecting to the transducer handle. Several new transducers have been developed using new connection technology. A 40 x 40 = 1,600 element, 3.5 MHz array was fabricated with 256 transmit and 256 receive elements. A 60 x 60 = 3,600 element 5.0 MHz array was constructed with 248 transmit and 256 receive elements. An 80 x 80 = 6,400 element, 2.5 MHz array was fabricated with 256 transmit and 208receive elements. 2-D transducer arrays were also developed for volumetric scanning in an intra cardiac catheter, a 10 x 10 = 100 element 5.0 MHz forward-looking array and an 11 x 13 = 143 element 5.0 MHz side-scanning array. The-6dB fractional bandwidths for the different arrays varied from 50% to 63%, and the 50 omega insertion loss for all the transducers was about-64 dB. The transducers were used to generate real-time volumetric images in phantoms and in vivo using the Duke University real time volumetric imaging system, which is capable of generating multiple planes at any desired angle and depth within the pyramidal volume.
本文描述了用于实时容积成像的二维阵列换能器的设计、制造和评估。我们之前描述的换能器工作频率低于3MHz，并且由于连接到换能器手柄所采用的互连方案，对操作人员来说操作起来很不方便。现已采用新的连接技术开发了几种新型换能器。制造了一个40×40 = 1600阵元、3.5MHz的阵列，其中有256个发射阵元和256个接收阵元。构建了一个60×60 = 3600阵元、5.0MHz的阵列，有248个发射阵元和256个接收阵元。制造了一个80×80 = 6400阵元、2.5MHz的阵列，有256个发射阵元和208个接收阵元。还开发了用于心内导管容积扫描的二维换能器阵列，一个10×10 = 100阵元、5.0MHz的前视阵列和一个11×13 = 143阵元、5.0MHz的侧扫阵列。不同阵列的-6dB分数带宽在50%至63%之间变化，所有换能器的50Ω插入损耗约为-64dB。使用杜克大学实时容积成像系统，这些换能器被用于在体模和体内生成实时容积图像，该系统能够在锥体容积内的任何所需角度和深度生成多个平面的图像。
