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Abstract #4832

Evaluation of electric fields induced in the patient during body rotations in the static magnetic field of a MRI-LINAC system

Adnan Trakic 1 , Limei Liu 1 , Hector Sanchez Lopez 1 , Luca Zilberti 2 , Feng Liu 1 , Ewald Weber 1 , and Stuart Crozier 1

1 The School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD, Australia, 2 Divisione Elettromagnetismo, Istituto Nazionale di Ricerca Metrologica, Torino, Italy

This novel study evaluates the induced electric field and current densities due to the rotation of the patient in a static magnetic field produced by the split superconducting magnet of a realistic MRI-Linear Particle Accelerator (LINAC) system. It was found that rotating the patient in the radial orientation relative to the magnet gap with periods larger than about 15.3 seconds would not exceed the ICNIRP exposure limits. This new research provides useful insights into the safe use of the MRI-LINAC technology and optimal orientations of the patient during image-guided treatment.

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