Abstract #1353
Current limited superconducting RF coils
Christopher Stumpf 1 , Tobias Frank 1 , Markus Vester 2 , Sebastian Martius 3 , Robert Rehner 2 , Rainer Engelbrecht 1 , and Lorenz-Peter Schmidt 1
1
Institute of Microwaves and Photonics,
University of Erlangen-Nuremberg, Erlangen, Bavaria,
Germany,
2
Healthcare
Sector, Siemens AG, Erlangen, Bavaria, Germany,
3
Corporate
Technology, Siemens AG, Erlangen, Bavaria, Germany
Superconducting self-resonant RF coils can be used in
MRI as receive coils to raise the image SNR. Those coils
distort the TX magnetic field if they are not detuned. A
new method is presented to passively detune
self-resonant HTS coils without Q-factor reduction by
inserting a taper into the coil structure. Measurements
of RF current in the loop at varying absorbed powers
show that the current is limited to a maximum value. By
reducing the trace width of the taper the maximum
current value is reduced and the distortion of the TX
field due to induction is decreased.
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