Title :
A New Definition of Mutual Impedance between Two Coils for Simultaneous MRI Signal Reception
Author :
Li, Bing Keong ; Hui, Hon Tat ; Crozier, Stuart
Author_Institution :
Sch. of Inf. Technol. & Electr. Eng., Queensland Univ., Brisbane, Qld.
Abstract :
A new definition of mutual impedance for two coils used for simultaneous signal reception in MRI is introduced. The new mutual impedances are used to accurately quantify the mutual coupling effect between the two coils so that it can be removed from the measured terminal voltages. Using the new mutual impedances, a new decoupling method can be formulated to obtain the uncoupled voltages. Numerical results on two square coils are obtained and the uncoupled coil voltages calculated based on them indicate extremely small errors when compared with the ideal uncoupled voltages. The new mutual impedances are useful for MRI phased array designs
Keywords :
arrays; biomedical MRI; coils; electric impedance; MRI phased array designs; decoupling method; mutual coupling effect; mutual impedance; simultaneous MRI signal reception; square coils; terminal voltages; uncoupled coil voltages; Capacitors; Coils; Current distribution; Impedance; Magnetic resonance imaging; Mutual coupling; Phased arrays; Strips; Tuning; Voltage;
Conference_Titel :
Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Conference_Location :
Shanghai
Print_ISBN :
0-7803-8741-4
DOI :
10.1109/IEMBS.2005.1616670
