title: Development of the technical capabilities needed to build and position a prepolarization coil for a magnetic resonance imaging magnet.
abstract: An experiment to show that a magnetic resonance imaging (MRI) magnet could be assembled around a patient, and used as part of a prepolarization system in which substantial transient forces are applied to parts of it, is described. The paper describes the circumstances that develop as a result of the application of the large transient fields used in this type of study, and outlines the reason for the tolerances that are permissible on the alignment of the system components. It then describes a test rig used to evaluate how the various problems might be overcome, and reports on the performance achieved with this rig. On the basis of this work, it appears that a system could be developed that would allow the application of these methods in clinical MRI.
authors: Department of Mechanical Engineering, Imperial College, London, UK.
authors: M
authors: M
authors: Jaensch
authors: I R
authors: IR
authors: Young
authors: C
authors: C
authors: Besant
authors: A
authors: A
authors: Atkins
authors: M
authors: M
authors: Lamperth
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000295:instrumentation* / Q000379:methods; D008280:Magnetics / Q000295:instrumentation*; D014159:Transducers; D051598:Whole Body Imaging / Q000295:instrumentation* / Q000379:methods