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SENSE optimization of a transceive surface coil array for MRI at 4 T

✍ Scribed by Robert G. Pinkerton; Graeme C. McKinnon; Ravi S. Menon

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
570 KB
Volume
56
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

Parallel imaging (PI) techniques employ the use of multiple radiofrequency (RF) channels to transmit and/or receive the NMR signal. In the current study we use a finite difference time domain (FDTD) method to simulate the electromagnetic fields of a RF coil array operating in transmit‐receive (transceive) mode and receive‐only mode. Optimization of these configurations for PI is studied as well. Our results suggest that a coil array can effectively be used for transceive or receive‐only PI techniques. For a head coil configuration, the sensitivity encoding (SENSE) optimized coil array gap size and PI acceleration factor for MRI are shown to be a function of the physiological‐to‐intrinsic‐noise ratio (PhINR) with a much stronger dependence on acceleration factor than gap size. The results provide a means to optimize any PI sequence by varying the acceleration factor based on the measured PhINR. In addition, an example design for an eight‐element transceive coil array for heads at 4 T is given. Magn Reson Med, 2006. © 2006 Wiley‐Liss, Inc.

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