Fast, Thermal Dose-based Exposure Safety Supervision
Esra Neufeld 1 , Manuel Murbach 1 , and Niels Kuster 1,2
IT'IS Foundation for Research on Information
Technologies in Society, Zurich, Switzerland,
Federal Institute of Technology (ETHZ), Zurich,
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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