[1E08-13] Dosietry 3

[1E10] Development of thyroid dose monitoring system using gamma-ray spectrometers

(3)A method to quantify radioiodine in thyroid for a newly developed thyroid monitoring system

*Hiroshi Yoshitomi¹, Sho Nishino¹, Masa Takahashi¹, Yoshihiko Tanimura¹ (1. JAEA)

Keywords:Thyroid, Radioiodine, Internal exposure, Voxel phantom

The detector positions of the thyroid monitor were determined by Monte Carlo calculations using voxel phantoms so that the counting efficiency of the thyroid monitor was adequately high and less dependent on the age. The calibration conditions to reproduce the thyroid measurements of the monitored subjects were found using simplified physical phantoms including point sources.