A Potential-Based Formulation for Motion-Induced Electric Fields in MRI

This paper presents a potential-based formulation conceived to estimate the electric field induced in a human body moving through the stray stationary magnetic field produced by magnetic resonance scanners. Two different descriptions are adopted, giving rise to two different driving terms, and the corresponding electromagnetic problems are solved numerically, according to a finite element approach. The application of the procedure recommended by the International Commission on Non-Ionizing Radiation Protection guidelines to perform the exposure assessment is discussed, and some examples, which refer to a realistic situation, are finally presented.