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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 Forbes
New 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 Superconductivity

Volume

11

Pagination

4014-4022

ISSN

1051-8223

Department/School

School of Natural Sciences

Publisher

Institute of Electrical and Electronic Engineers Inc

Place of publication

USA

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the mathematical sciences

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