Optimal coil array design: the two-coil case.
The optimization problem for coil arrays is largely unsolved, even for the case of a two-coil system. This paper reports a systematic computer simulation to investigate the maximal achievable signal-to-noise ratio (SNR) with a two-coil receiver system where, using cancellation circuitry, mutual inductance is made zero. Both symmetrical and asymmetrical solutions with respect to two-coil geometry are considered. SNR is measured at a single point at a certain depth and also along a longitudinal or transverse line at the same depth. The conducting medium containing these regions of interest is assumed to be an infinite half space, an infinite cylinder or a finite sphere. The previous coil array design using a "magical" overlap only approximates the optimal solution for the infinite half space. For the infinite cylinder and the finite sphere, optimal solutions can be quite different from the "magical" overlap.
Spincemaille
Pascal
P
Department of Radiology, Weill Medical College of Cornell University, New York, NY 10022, USA.
Brown
Ryan
R
Qian
Yongxian
Y
Wang
Yi
Y
D003198:Computer Simulation; D003287:Contrast Media; D004867:Equipment Design; D005682:Gadolinium; D006571:Heterocyclic Compounds; D007089:Image Enhancement; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D009942:Organometallic Compounds; D019047:Phantoms, Imaging
D003287:Contrast Media; D006571:Heterocyclic Compounds; D009942:Organometallic Compounds; C062402:gadoteridol; D005682:Gadolinium