Abstract #1289
Sensing of Birdcage Rung Currents for Detection of Anomalous Loading
Christopher Ellenor 1 , Pascal Stang 1,2 , John Pauly 1 , and Greig Scott 1
1
Electrical Engineering, Stanford University,
Stanford, CA, United States,
2
Procyon
Engineering, San Jose, CA, United States
A birdcage coil is fitted with optically coupled current
sensors on each of its rungs. This tool gives new, rapid
and realtime information about the spatial distribution
of current in the coil under different loading
conditions. The detection of anomalous loading
conditions may be indicative of certain RF safety
hazards such as resonant wire coupling or strong
coupling to tissue through the bore wall, leading to
burns. Phantom experiments are conducted and distortion
of the rung current pattern due to anomalous loading is
observed.
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