A Study of a calibration technique for a newly developed thyroid monitor and its uncertainties due to body size for radioiodine measurements

Yoshitomi, Hiroshi; Nishino, Sho; Tanimura, Yoshihiko; Takahashi, Masa

Radiation Measurements, 133, p.106279_1 - 106279_6, 2020/04

https://doi.org/10.1016/j.radmeas.2020.106279

Uncertainty of the body size on the counting efficiency of a newly developed thyroid monitor was estimated by Monte Carlo simulations using several voxel phantoms. Overlying tissue thickness was a major impact factor on the counting efficiency. As a result, uncertainty related to the body size of the monitored subject was found to be 25%.

A New method to evaluate radioiodine activity in thyroid by the spectroscopy measurements using a simplified phantom incorporated with simulations

Yoshitomi, Hiroshi; Nishino, Sho; Takahashi, Masa; Tanimura, Yoshihiko

no journal, , 

Development of portable thyroid radio-iodine dose monitor with radiation shield

Tanimura, Yoshihiko; Nishino, Sho; Yoshitomi, Hiroshi

no journal, , 

In the situation of a severe nuclear accident, radioiodine monitoring in thyroid should be performed for a large number of people immediately after accident. The portable thyroid dose monitoring system with the radiation shield which can be used in a high dose rate condition has been developed. In this presentation, the outline of the monitoring system and the performance test results using the system will be described.