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
The School of Information Technology and
Electrical Engineering, The University of Queensland,
Brisbane, QLD, Australia,
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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