High-resolution magnetic field numerical dosimetry for live-line workers

Numerical modeling provides one means for the realistic assessment of the electric field and current density levels induced in the bodies of live-line utility workers during occupational exposure to 60 Hz nonuniform magnetic fields. An efficient scalar potential finite difference method is applied to anatomically-derived high-resolution heterogeneous human body conductivity models, to provide such estimates for four representative posture and exposure scenarios. Dosimetric data are presented in terms of volumetric maximum and root mean square fields induced in various tissue groups by unit current. The results scale linearly with total source current, which allows the data to be applied to arbitrary current levels.