Abstract #0175
Comprehensive RF Safety Concept for Parallel Transmission MR
Ingmar Graesslin 1 , Peter Vernickel 1 , Peter Brnert 1 , Kay Nehrke 1 , Giel Mens 2 , Paul Harvey 2 , and Ulrich Katscher 1
1
Philips Research Laboratories, Hamburg,
Germany,
2
Philips
Healthcare, Best, Netherlands
Achieving RF patient safety in parallel transmission is
difficult, due to the freedom in tailoring the RF
transmit fields. Before and during the scan, its
conformity with existing SAR limits has to be verified
to ensure patient safety. We developed, implemented, and
verified a new comprehensive RF
patient-safety-supervision concept that combines
real-time global SAR and local SAR supervision with
real-time RF supervision. This new concept allows for a
significantly increased permissible RF duty cycle,
improves the detection of SAR limit violations and
patient-unsafe conditions, and reduces the number of
false-positive scan interruptions.
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