(A) Segmented MRI of a 29-month-old child was used to create 3D models of the child’s silhouette, skull, brain, ribcage, heart, liver and lungs. (B) The tetrahedral meshes were post processed for finite element simulations. Simulations include five major tissues, including silhouette, skull, brain, ribcage, and heart, which were assigned to four different electric properties to represent the body heterogeneity. (C) The simulated body model used for transfer function prediction. Two additional tissues, the liver and lungs, were included near the heart to more accurately mimic realistic scenarios.