Correction Factor for Potassium-40 Whole-body Counting

概要

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Correction factors, correlation between 40K whole-body counting efficiencies and a simple physical parameter, were determined using Monte Carlo simulation. The surface area of a subject was adopted as the correction factor parameter for practical routine use in the interpretation of response functions from the subject, and from the relationship between the surface area and counting efficiencies of a whole-body counter a correction equation was derived. To testify the feasibility of the correction factor, the 40K contents in the total body of Japanese male adults were measured with a whole-body counter, and the 40K contents corrected by using the correction equation were compared with those estimated with a bioelectrical impedance instrument. The quantitative agreement of the 40K contents corrected by whole-body counting with those estimated by means of the bioelectrical impedance instrument is fairly good. The response function and counting efficiency of the whole-body counter to a 40K phantom were obtained by calculation and actual measurement. It was found that calculation by the EGS4 code agrees very well with the measurement.
一般社団法人日本原子力学会の論文
1999-10-25