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The Stochastic Design of Force-Minimised Compact Magnets for High-Field Magnetic Resonance Imaging Applications
journal contribution
posted on 2023-05-16, 12:48 authored by Crozier, S, Snape-Jenkinson, CJ, Lawrence ForbesLawrence ForbesNew designs for force-minimized compact high-field clinical MRI magnets are described. The design method is a modified simulated annealing (SA) procedure which includes Maxwell forces in the error function to be minimized. This permits an automated force reduction in the magnet designs while controlling the overall dimensions of the system. As SA optimization requires many iterations to achieve a final design, it is important that each iteration in the procedure is rapid. We have therefore developed a rapid force calculation algorithm. Novel designs for short 3-and 4-T clinical MRI systems are presented in which force reduction has been invoked. The final designs provide large homogeneous regions and reduced stray fields in remarkable short magnets. A shielded 4-T design that is approximately 30% shorter than current designs is presented. This novel magnet generates a full 50-cm diameter homogeneous region.
History
Publication title
IEEE Transactions on Applied SuperconductivityVolume
11Pagination
4014-4022ISSN
1051-8223Department/School
School of Natural SciencesPublisher
Institute of Electrical and Electronic Engineers IncPlace of publication
USARepository Status
- Restricted