Title :
Design of optimized gradient systems for magnetic resonance imaging
Author :
Villa, Marco ; Savini, Antonio ; Mustarell, P.
Author_Institution :
Pavia Univ., Italy
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;
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
DOI :
10.1109/IEMBS.1989.95894
