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Abstract #3228

Fast, Thermal Dose-based Exposure Safety Supervision

Esra Neufeld 1 , Manuel Murbach 1 , and Niels Kuster 1,2

1 IT'IS Foundation for Research on Information Technologies in Society, Zurich, Switzerland, 2 Swiss Federal Institute of Technology (ETHZ), Zurich, Switzerland

A fast method to estimate exposure safety during MRI based on thermal dose (CEM43) has been developed that is capable of considering the transient nature of heating, exposure duration, local SAR, and the impact of perfusion as well as thermoregulation. Thus it overcomes problems associated with traditional SAR-based limits. The assumptions and relationships underlying the model have been verified and necessary constants derived using simulations. Comprehensive uncertainty analysis has been performed and the predictions have been validated against measurement data and detailed simulations of realistic scan sequences and exposure scenarios.

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