Study on advancement of counting using mathematical simulation

Kinase, Sakae   

In the present study, a calibration technique for in vivo counting application using Monte Carlo simulation was developed. The advantage of the technique is that counting efficiency can be obtained for various shapes, sizes that is very difficult to change for phantoms. The method for the determination of counting efficiency curves as a function of energy was developed using the present technique and a physiques correction equation was derived from the relationship between parameters of correction factor and counting efficiencies of the JAERI whole-body counter. The uncertainties in body burdens of Cs-137 estimated with the JAERI whole-body counter were also investigated using the Monte Carlo simulation and measurements. Furthermore, the evaluation method of the peak efficiencies of a Ge semi-conductor detector was developed by the Monte Carlo simulation for optimum arrangement of Ge semi-conductor detectors for designing a precision whole-body counter.