01966nas a2200205 4500008004100000245006200041210006200103260006500165520128400230653001501514653002501529653004501554653002501599100002201624700001301646700001501659700001501674700002001689856005101709 2003 eng d00aApproach to Design an Efficient Resistive Magnets for MRI0 aApproach to Design an Efficient Resistive Magnets for MRI bThe International Society for Magnetic Resonance in Medicine3 aOne 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.10acateg_st2i10aimagerie_RMN_optique10aMéthodes et systèmes en IRM et optique10areseau_international1 aSánchez Lopez, H1 aCabal, C1 aGarrido, C1 aBriguet, A1 aSaint-Jalmes, H uhttp://espace.library.uq.edu.au/view/UQ:161889