Development of exposure reduction technologies by digitalization of environment and radioactive source distribution, 3; LASSO theory and demonstration for inverse estimation on radioactive source distributions

Shi, W.*; 町田 昌彦  ; 山田 進  ; 吉田 亨*; 長谷川 幸弘*; 岡本 孝司

Shi, W.*; Machida, Masahiko; Yamada, Susumu; Yoshida, Toru*; Hasegawa, Yukihiro*; Okamoto, Koji

A mathematical criterion on the number of monitoring points to correctly predict source distributions based on LASSO theory is developed for ill-posed radioactive source reconstruction. We employ Monte Carlo simulation to demonstrate and verify the feasibility of LASSO. Moreover, an influence factor like detector-source distance to enhance the predicting possibility in the inverse estimation is also examined.