Influence of skin depth on NMR coil impedance.
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.
Harpen
M D
MD
University of South Alabama, College of Medicine, Department of Radiology, Mobile 36617.
D004553:Electric Conductivity; D006801:Humans; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation*; D008433:Mathematics; D008954:Models, Biological; D012867:Skin / Q000033:anatomy & histology; D012879:Skin Physiological Phenomena