环形阵换能器实时三维成像房间隔封堵器。
Ring array transducers for real-time 3-D imaging of an atrial septal occluder.
机构信息
Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA.
出版信息
Ultrasound Med Biol. 2012 Aug;38(8):1483-7. doi: 10.1016/j.ultrasmedbio.2012.03.019. Epub 2012 Jun 12.
We developed new miniature ring array transducers integrated into interventional device catheters such as used to deploy atrial septal occluders. Each ring array consisted of 55 elements operating near 5 MHz with interelement spacing of 0.20 mm. It was constructed on a flat piece of copper-clad polyimide and then wrapped around an 11 French O.D. catheter. We used a braided cabling technology from Tyco Electronics Corporation to connect the elements to the Volumetric Medical Imaging (VMI) real-time 3-D ultrasound scanner. Transducer performance yielded a -6 dB fractional bandwidth of 20% centered at 4.7 MHz without a matching layer vs. average bandwidth of 60% centered at 4.4 MHz with a matching layer. Real-time 3-D rendered images of an en face view of a Gore Helex septal occluder in a water tank showed a finer texture of the device surface from the ring array with the matching layer.
我们开发了新型微型环形阵换能器，将其集成到介入式设备导管中，例如用于部署房间隔封堵器的导管。每个环形阵由 55 个元件组成，工作频率接近 5 MHz，元件之间的间隔为 0.20 毫米。它是在一块扁平的铜包聚酰亚胺上构建的，然后缠绕在 11 法国外径的导管上。我们使用泰科电子公司的编织布线技术将元件连接到容积医学成像（VMI）实时 3-D 超声扫描仪。换能器性能在没有匹配层的情况下，在 4.7 MHz 处产生了 -6 dB 的分数带宽为 20%，而在有匹配层的情况下，在 4.4 MHz 处的平均带宽为 60%。在水箱中的戈尔 Helex 房间隔封堵器的正面视图的实时 3-D 渲染图像显示，带有匹配层的环形阵可以更清晰地显示设备表面的纹理。
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