A time-harmonic inverse methodology for the design of RF coils in MRI.
An inverse methodology is described to assist in the design of radio-frequency (RF) coils for magnetic resonance imaging (MRI) applications. The time-harmonic electromagnetic Green's functions are used to calculate current on the coil and shield cylinders that will generate a specified internal magnetic field. Stream function techniques and the method of moments are then used to implement this theoretical current density into an RF coil. A novel asymmetric coil operating for a 4.5 T MRI machine was designed and constructed using this methodology and the results are presented.
Lawrence
Ben G
BG
Centre for Magnetic Resonance, University of Queensland, St Lucia Brisbane, Australia. ben.lawrence@cmr.uq.edu.au
Crozier
Stuart
S
Yau
Desmond D
DD
Doddrell
David M
DM
D004574:Electromagnetic Fields; D004867:Equipment Design; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008433:Mathematics; D019047:Phantoms, Imaging; D011846:Radio Waves