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Phantom design method for high-field MRI human systems

✍ Scribed by Qing X. Yang; Jinghua Wang; Christopher M. Collins; Michael B. Smith; Xiaoliang Zhang; Kamil Ugurbil; Wei Chen

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
224 KB
Volume
52
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

A phantom design method suitable for high‐field MRI based on the RF field wave characteristics of sample and experimental validations at 7.0 T and 3.0 T are presented. The RF field distribution in a phantom with a given RF coil system is primarily determined by the sample size relative to the wavelength inside the sample, and the ratio between the displacement and conduction currents. Experimental results demonstrate that the MR image intensity patterns associated with wave behavior in human samples at a given field strength can be reproduced with a phantom at the same or different field strengths once the dimension and penetration constant are scaled by the corresponding wavelength in the sample medium. Magn Reson Med 52:1016–1020, 2004. Β© 2004 Wiley‐Liss, Inc.

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