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Phantom design method for high‐field MRI human systems
Author(s) -
Yang Qing X.,
Wang Jinghua,
Collins Christopher M.,
Smith Michael B.,
Zhang Xiaoliang,
Ugurbil Kamil,
Chen Wei
Publication year - 2004
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.20245
Subject(s) - imaging phantom , electromagnetic coil , field strength , wavelength , field (mathematics) , sample (material) , optics , nuclear magnetic resonance , penetration depth , materials science , physics , magnetic field , mathematics , quantum mechanics , pure mathematics , thermodynamics
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. © 2004 Wiley‐Liss, Inc.