Development of 7-Year-Old Korean Child Model for Computational Dosimetry

Abstract

ABSTRACT⎯A whole-body voxel model of a 7-year-old male volunteer was developed from 384 axial magnetic resonance images (MRIs).The MRIs were acquired with intervals of 3 mm for the entire body in a body coil.In order to reduce the MRI acquisition time for the child, the repetition and echo times under T1 weighted image were chosen to be 566 ms and 8 ms, respectively.The MRIs were classified according to 30 types of tissues with known electrical parameters.The developed voxel model was adjusted to the physical average of 7-year-old Korean boys.The body weight of the adjusted model, calculated with the mass tissue densities, is within a 6% difference from the 50th percentile weight.Keywords⎯Whole-body child voxel model, magnetic resonance image, electromagnetic exposure, dosimetry.