Design of optimized gradient systems for magnetic resonance imaging

Author

Villa, Marco ; Savini, Antonio ; Mustarell, P.

Author_Institution

Pavia Univ., Italy

fYear

1989

Firstpage

605

Abstract

An efficient numerical procedure is applied to the synthesis of the magnetic field gradients which encode the spatial information in magnetic resonance imaging (MRI) experiments. The procedure is based on a derivative-free modification of the Levenberg-Marquardt algorithm. It minimizes the discrepancy between the ideal field and that created by a distribution of currents described by an allowed choice of design parameters. The procedure is used to improve the gradients coils for an early whole-body resistive MRI magnet, as well as the coils for an iron-core electromagnet used in a small-object imager

Keywords

biomedical NMR; patient diagnosis; Fe-core electromagnet; Levenberg-Marquardt algorithm; current distribution; efficient numerical procedure; gradients coils; magnetic field gradients synthesis; magnetic resonance imaging; optimised gradient systems design; small-object imager; spatial information encoding; whole-body resistive MRI magnet; Coils; Design optimization; Driver circuits; Electromagnets; Frequency; Magnetic fields; Magnetic resonance imaging; Nuclear magnetic resonance; Pulse circuits; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in

Conference_Location

Seattle, WA

Type

conf

DOI

10.1109/IEMBS.1989.95894

Filename

95894