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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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