Radiative losses of a birdcage resonator.
We present a derivation of the losses in a birdcage resonator due to radiation. We also present an expression for the radiation limited Q. It is shown that in head coil imaging at 63 MHz radiative losses may account for 20% of the total loss with a radiation limited Q on the order of 150. The results are shown to be consistent with those reported in the recent literature.
University of South Alabama, Department of Radiology, Mobile 36617.
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MD
Harpen
D004560:Electricity; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008962:Models, Theoretical; D011827:Radiation