B1 homogenization in MRI by multilayer coupled coils.
Transmit B(1)(+) field homogenization in high-field ( > 3.0 T) human magnetic resonance imaging (MRI) is challenging due to radio-frequency wavelength effects. An approach based on appropriately coupling surface coils to a volume coil was investigated. Electromagnetic simulation results demonstrated the feasibility and effectiveness of this method in proton MRI of the human head at 7.0 T.
Wang
Shumin
S
Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892 USA. wangshu@ninds.nih.gov
Murphy-Boesch
Joseph
J
Merkle
Hellmut
H
Koretsky
Alan P
AP
Duyn
Jeff H
JH