J Magn Reson. 1999 Oct;140(2):325-39.

Fast optimization of a biplanar gradient coil set.

Tomasi D, Caparelli EC, Panepucci H, Foerster B.

Source

Escuela de Ciencia y Tecnologia, Universidad Nacional de General San Martin, Alem 3901, 1651 San Andres, Buenos Aires, Argentina.

Abstract

This work presents an approach for fast optimization of gradient coils, using the simulated annealing method. The shielding condition derived from a target field method and the analytical evaluation of the fields produced by simple geometries were used to reduce the computing time. This method is applied to the optimization of a shielded biplanar gradient coil set. Efficiency, inductance, and homogeneity of the gradient fields produced by the optimized geometries were studied as a function of the number of wires, for the longitudinal and transverse gradient coils. A prototype of the gradient set was made to test the proposed design method. The resulting experimental values of coil efficiency, inductance, field linearity, and shielding performance exhibit good agreement between theory and experiment.

PMID:: 10497040; [PubMed - indexed for MEDLINE]

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Research Support, Non-U.S. Gov't

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Magnetic Resonance Spectroscopy*

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