Real-time 3D ultrasound laparoscopy

IEEE Ultrasonics Symposium, 2005. Pub Date : 2005-09-18 DOI:10.1109/ULTSYM.2005.1602971

E. Light, E. Dixon-Tulloch, P. Wolf, S.W. Smith, S. Idriss

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引用次数: 6

Abstract

We have previously described 2D array ultrasound transducers operating up to 13.5 MHz for applications including real time 3D transthoracic imaging, real time volumetric intracardiac echocardiography (ICE), real time transesophageal echocardiography (TEE) and real time 3D intravascular ultrasound (IVUS) imaging. We have recently built a pair of 2D array transducers for real time 3D laparoscopic ultrasound imaging. These transducers are intended to be placed down a trocar during minimally invasive surgery. Both transducers were built using Gore MicroFlat cables consisting of 18 wires spaced at 0.10 mm and attached to a polyimide backing. The first is a forward viewing 5 MHz, 19 x 11 array with 198 operating elements. It was built on an 8 layer multi-layer flex circuit. The interelement spacing is 0.20 mm yielding an aperture that is 2.2 mm x 3.8 mm. The O.D. of the completed transducer is 10.2 mm , and includes a 2 mm tool port. The average measured center frequency is 4.5 MHz, and the -6 dB bandwidth ranges from 15% to 30%. The 50 Ohm insertion loss, including the MicroFlat cabling, is -81.2 dB. The second transducer is a 7 MHz, 36 x 36 array with 504 operating elements. It was built upon a 10 layer multi-layer flex circuit. This transducer is in the forward viewing configuration, and the interelement spacing is 0.18 mm. The total aperture size is 6.48 mm x 6.48 mm. The O.D. of the completed transducer is 11.4 mm. The average measured center frequency is 7.2 MHz, and the -6 dB bandwidth ranges from 18% to 33%. The 50 Ohm insertion loss is -79.5 dB, including the MicroFlat cable. Real time in vivo 3D images of a canine heart have been made including an apical 4 chamber view from a substernal access with the first transducer to monitor cardiac function. In addition we produced real time 3D rendered images of the right pulmonary veins from a right parasternal access with the second transducer which would be valuable in the guidance of cardiac ablation catheters for treatment of atrial fibrillation.

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实时三维超声腹腔镜

我们之前已经描述了工作频率高达13.5 MHz的2D阵列超声换能器，用于实时3D经胸成像、实时心内容积超声心动图(ICE)、实时经食管超声心动图(TEE)和实时3D血管内超声(IVUS)成像。我们最近建造了一对用于实时三维腹腔镜超声成像的二维阵列换能器。在微创手术中，这些换能器被放置在套管针中。这两种传感器都使用Gore MicroFlat电缆构建，该电缆由18根间距为0.10 mm的导线组成，并连接到聚酰亚胺衬底。第一种是前视5 MHz, 19 x 11阵列，有198个操作元件。它建立在一个8层多层挠性电路上。元件间距为0.20 mm，孔径为2.2 mm x 3.8 mm。完成换能器的外径为10.2 mm，并包括一个2mm的工具端口。测量的平均中心频率为4.5 MHz， - 6db带宽范围为15% ~ 30%。包括MicroFlat电缆在内的50欧姆插入损耗为-81.2 dB。第二个换能器是一个7 MHz, 36 x 36阵列，有504个工作元件。它建立在一个10层多层挠性电路上。该换能器为前视配置，元件间距为0.18 mm。总孔径尺寸为6.48 mm × 6.48 mm。完成换能器的外径为11.4 mm。平均测量中心频率为7.2 MHz， - 6db带宽范围为18% ~ 33%。包括MicroFlat电缆在内，50欧姆的插入损耗为-79.5 dB。犬心脏的实时活体3D图像已经完成，其中包括从胸骨下通道获得的心尖腔视图，其中第一个传感器用于监测心脏功能。此外，我们用第二个换能器从右胸骨旁通道生成了右肺静脉的实时3D渲染图像，这将对心脏消融导管治疗房颤的指导有价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE Ultrasonics Symposium, 2005.

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