AN ADJUSTABLE RF COIL LOADING DEVICE

被引：8

作者：

HAYES, CE

机构：

[1] Applied Science Laboratory, General Electric Medical Systems, Waukesha

来源：

MAGNETIC RESONANCE IMAGING | 1993年 / 11卷 / 01期

关键词：

RF COIL LOADER; PATIENT LOSS SIMULATOR;

D O I：

10.1016/0730-725X(93)90415-A

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

This paper describes an adjustable loading device that can substitute for the tissue losses of various sized patients in a whole-body MR imager. It resembles a lowpass birdcage resonator but with resistors replacing the capacitors on the cylindrical surface. Power dissipated is a monotonic function of the total surface conductance of the loader. The loader can be used in conjunction with a low loss water filled phantom to measure signal-to-noise ratios (SNR). The impact on measured SNR due to screening by the loader and changing the phantom size or composition are also briefly discussed.

引用

页码：81 / 86

页数：6

共 13 条

[11] Edelstein, Bottomley, Pfeifer, A signal-to-noise calibration procedure for NMR imaging systems, Med. Phys., 11, pp. 180-185, (1984)
[12] Jennings, Lerski, McRobbie, Straughan, Orr, Simulation of patient loading in nuclear resonance imaging through the use of inductive damping loops, Br. J. Radiol., 59, pp. 1031-1034, (1986)
[13] Hayes, Edelstein, Schenck, Mueller, Eash, An efficient, highly homogeneous radiofrequency coil for whole-body NMR imaging at 1.5T, J. Magn. Reson., 63, pp. 622-628, (1985)

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