Two dimensional arrays for real time 3D intravascular ultrasound
Two dimensional arrays for real time 3D intravascular ultrasound
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DOI：
10.1177/016173460402600204
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发表时间：
2004-04-01
影响因子：
2.3
通讯作者：
Smith, SW
中科院分区：
文献类型：
--
作者：
Light, ED;Smith, SW
我们之前已经描述了在高达10.0 MHz下工作的2D阵列，包括用于经胸心脏成像的几千个元件和用于使用7 Fr至12 Fr导管的心内成像的一百多个元件。我们已经开始探索前视真实的时间3D相控阵血管内超声，这可能需要几厘米的成像深度来向下观察血管的轴以观察易损的动脉粥样硬化斑块。我们使用了一种基于非同轴电缆的技术，允许100根信号线放置在内径为1.3 rum的4.8 French IVUS管腔内。我们采用了两种不同的制造技术来构建换能器。每个探头均以前视配置构建，以允许同时进行导管头端远端血管和血管支架的真实的实时B扫描、C扫描和体积绘制。为了获得所需的穿透深度，每个换能器被构造为在10.0 MHz下操作。第一种方法包括11 x 11 - 121个元素的有序数组。为了符合IVUS管腔的圆形孔径，切掉了拐角，总共有97个信号通道。真实的实时图像包括组织模拟体模中的4 mm直径血管、扩张的支架和切除的绵羊主动脉中的支架。第二种方法基于激光切割技术，该技术以随机图案切割各个元件。这导致了61个信号通道。AIUM测试对象的真实的实时3D图像由该换能器制成。
We have previously described 2D arrays operating at up to 10.0 MHz consisting of several thousand elements for transthoracic cardiac imaging and over a hundred elements for intracardiac imaging using 7 Fr to 12 Fr catheters. We have begun to explore forward viewing real time 3D phased array intravascular ultrasound, which may require imaging depths of a few centimeters to look down the axis of a vessel to view vulnerable atherosclerotic plaque. We used a noncoaxial based cable technology that allowed 100 signal wires to be placed inside a 4.8 French IVUS lumen with an inner diameter of 1.3 rum. We pursued two different fabrication technologies for the building of the transducers. Each transducer was constructed in the forward viewing configuration to allow simultaneous real time B-scans, C-scans and volumetric rendering of vessels and vascular stents distal to the catheter tip. In order to obtain the desired penetration depth, each transducer was constructed to operate at 10.0 MHz. The first method included an ordered array of 11 x 11 - 121 elements. In order to conform to the round aperture of the IVUS lumen, the corners were cut off, resulting in a total of 97 signal channels. Real time images include a 4 mm diameter vessel in a tissue mimicking phantom, an expanded stent and a stent in an excised sheep aorta. The second method is based upon a laser dicing technique that cuts the individual elements in a random pattern. This resulted in 61 signal channels. Real time 3D images of the AIUM test object were made with this transducer.