TY - JOUR
T1 - Approach to Design an Efficient Resistive Magnets for MRI
JF - Magn Reson Med
Y1 - 2003
A1 - Sánchez Lopez, H.
A1 - Cabal, C.
A1 - Garrido, C.
A1 - Briguet, A.
A1 - Saint-Jalmes, H.
KW - categ_st2i
KW - imagerie_RMN_optique
KW - Méthodes et systèmes en IRM et optique
KW - reseau_international
AB - One of the ways to obtain a low cost whole body Magnetic Resonance Imaging (MRI) machine is to use a resistive magnet as a main magnetic field generator. For a good magnet design, not only homogeneity and stability of magnetic field are needed. Other requirements like high efficiency, low cost, low resistive losses, compactness, good access to the Region of Interest (ROI) must be taken into account. In 1992, Pissanetzky defined a current density as a function of coordinates and divided the possible solutions region in many small identical coils elements [1]. The procedure, applied for superconductor magnets designs, produces low efficiency configurations. In the objective function only the field homogeneity is optimized. H. Xu et. al presented an elegant method where the optimum number of coils is selected automatically from the constraints and the applied algorithm [2]. However, when the current density is a given constraint, as in our case, it is very complicated to satisfy the necessary current density to reproduce the target field. For this reason the purpose of this paper is: 1- to describe a new alternative method to design low cost and efficient whole body resistive magnet for MRI; 2- to obtain an efficient low field resistive magnet for a MRI machine.
PB - The International Society for Magnetic Resonance in Medicine
UR - http://espace.library.uq.edu.au/view/UQ:161889
ER -