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Influence of skin depth on NMR coil impedance
1University of South Alabama, College of Medicine, Department of Radiology, Mobile 36617.
Physics in Medicine and Biology
|March 1, 1988
Abstract:
A derivation of the change in electrical impedance of an NMR surface coil produced by inductive coupling with a conducting medium is presented. The effect of skin depth is treated explicitly. Theoretical predictions of coil sample resistance and frequency offset are compared with those observed experimentally in a variety of circular surface coils and sample conductivities.