Harpen M D
University of South Alabama, College of Medicine, Department of Radiology, Mobile 36617.
Phys Med Biol. 1988 Mar;33(3):329-37. doi: 10.1088/0031-9155/33/3/002.
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.
