title: B1 homogenization in MRI by multilayer coupled coils.
abstract: 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.
authors.affiliation: 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
authors.forename: Shumin
authors.initials: S
authors.lastname: Wang
authors.forename: Joseph
authors.initials: J
authors.lastname: Murphy-Boesch
authors.forename: Hellmut
authors.initials: H
authors.lastname: Merkle
authors.forename: Alan P
authors.initials: AP
authors.lastname: Koretsky
authors.forename: Jeff H
authors.initials: JH
authors.lastname: Duyn