A New Definition of Mutual Impedance between Two Coils for Simultaneous MRI Signal Reception

A New Definition of Mutual Impedance between Two Coils for Simultaneous MRI Signal Reception

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 mutu...

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Bibliographic Details
Published in:2005 IEEE Engineering in Medicine and Biology 27th Annual Conference Vol. 2005; pp. 1321 - 1323
Main Authors: Bing Keong Li, Hon Tat Hui, Crozier, S.
Format: Conference Proceeding Journal Article
Language:English
Published: United States IEEE 2005
Subjects:
Capacitors
Coils
Current distribution
Impedance
Magnetic resonance imaging
Mutual coupling
Phased arrays
Strips
Tuning
Voltage
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Summary: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
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ISBN:0780387414
9780780387416
ISSN:1094-687X
1557-170X
1558-4615
DOI:10.1109/IEMBS.2005.1616670