An expandable intravenous RF coil for arterial wall imaging
An expandable intravenous RF coil for arterial wall imaging
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DOI：
10.1002/jmri.1880080138
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发表时间：
1998-01-01
期刊：
影响因子：
--
通讯作者：
Rutt, BK
中科院分区：
文献类型：
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作者：
Martin, AJ;McLoughlin, RF;Rutt, BK
静脉（iv）射频（RF）线圈提出了一种手段，获得高分辨率的图像动脉壁。研究了外周动静脉对的解剖定位，构建了模拟髂动静脉对的假体。通过对比静脉线圈与外部线圈的成像结果显示，静脉线圈的信噪比（SNR）可能增加15至20倍。信噪比的优势是在圆柱形体积上测量的，靠近线圈，典型的动脉位置。原型可扩展iv线圈由Cu-Be环构成，并通过8-Fr导管引入，研究了局部和远程iv线圈调谐的影响，发现局部调谐可提供显着的信噪比优势。在猪动物模型上验证了iv射频线圈的体内性能。静脉线圈被认为是动脉内线圈的一个很好的替代品。
An intravenous (iv) radiofrequency (RF) coil is proposed as a means of obtaining high resolution images of artery wall. The anatomic positioning of peripheral artery/vein pairs was investigated and a phantom mimicking the iliac artery/vein pair was constructed. Imaging results, comparing iv coils with external coils, demonstrated a potential 15- to 20-fold increase in signal-to-noise ratio (SNR) with iv coils. The SNR benefit was measured over a cylindrical volume, adjacent to the coil, and typical of artery position. Prototype expandable iv coils were constructed of Cu-Be loops and introduced via an 8-Fr catheter, The effects of local and remote iv coil tuning were investigated and local tuning was found to provide significant SNR benefits. The in vivo performance of iv RF coils was demonstrated in a porcine animal model. The iv coils were found to be an excellent alternative to intraarterial coils.