Distributed self-capacitance of magnetic resonance imaging birdcage coils.
Presented is a theoretical description of the self-capacitance of a low-pass birdcage coil. The problem considered is that the modification of the distributed self-capacitance produced by the electric interaction between the coil and a cylindrical Faraday screen and illustrates the phenomenon of coil self-capacitance as well as the influence of Faraday screens. Changes in coil self-capacitance produced by the presence of the screens are shown to be consistent with measured shifts in coil resonant frequencies.
Harpen
M D
MD
University of South Alabama, Department of Radiology, Mobile 36617.
D008279:Magnetic Resonance Imaging; D008433:Mathematics; D008962:Models, Theoretical