Modeling of Exposure to Low-Frequency Electromagnetic Fields of Workers in Arbitrary Posture

At the present time, numerical dosimetry has reached a certain level of maturity and dedicated commercial software packages are already available. However, the fast and accurate characterization of exposure in real conditions is still challenging for many reasons. For instance, when the exact body posture has to be considered, the classical approach is to evaluate the source magnetic field and then to perform a dosimetric computation with a postured phantom. We propose a different approach that, thanks to a change of variable, makes it possible to use a non-postured body model by deforming the source term. We show that for some rigid transformations, this procedure does not end up in a change of tissue conductivity, which is localized in knees, elbows, and other articulations, where deformations due to posturing are large. Only the source term must be determined by modifying the original one through a suitable transformation.