Title :
RF coils for MRI applications - a design procedure
Author :
Rogovich, A. ; Nepa, P. ; Manara, G. ; Monorchio, A.
Author_Institution :
Dept. of Inf. Eng., Pisa Univ.
Abstract :
A design procedure for radio frequency (RF) coils to be used in magnetic resonance imaging (MRI) applications is presented. The analysis is carried out by resorting to a full-wave numerical code based on the method of moments (MoM). Indeed, at the increasing of the operating frequency quasi-static solutions are no longer valid and more accurate electromagnetic tools are needed. The optimization is based on an iterative procedure that has been implemented by using a genetic algorithm (GA). The GA is used to determine the geometry of the coil by imposing the homogeneity of the RF magnetic field amplitude in a volume inside the coil at the resonance frequency. Some preliminary numerical results have been obtained for a volume coil with cylindrical shape and resonating at 190 MHz
Keywords :
biomedical MRI; coils; genetic algorithms; method of moments; 190 Hz; MRI applications; RF magnetic field amplitude; cylindrical shape; electromagnetic tools; full-wave numerical code; genetic algorithm; iterative procedure; magnetic resonance imaging; method of moments; quasistatic solutions; radiofrequency coils; resonance frequency; Coils; Genetic algorithms; Geometry; Magnetic analysis; Magnetic fields; Magnetic resonance imaging; Moment methods; Radio frequency; Resonant frequency; Shape;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1551700
