Developing the database on medical exposure to CT in NIRS in collaboration with WAZA-ARI

Akahane, Keiichi*; Ono, Koji*; Okuda, Yasuo*; Sato, Kaoru   ; Takahashi, Fumiaki  ; Ban, Nobuhiko*; Shimada, Yoshiya*; Endo, Akira   ; Kai, Michiaki*

The WAZA-ARI is a dose calculator of medical exposures on X-ray CT examinations, which is the web-based program based on the simulation data of voxel phantoms of Japanese adults and a 4-y girl. After the development, the WAZA-ARI has been installed in a web server of National Institute of Radiological Sciences (NIRS), and opened to the public as trial uses on Dec 2012. The user authentication function and the data input pages by users have been adding to the WAZA-ARI to store the calculated data and the inputted data of doses and frequencies of X-ray CT examinations into the database on medical exposure in NIRS for the analyses of the CT exposures. The use of these functions and WAZA-ARI II, which can calculate the doses of different patients' body sizes, will provide the basic and useful data on the CT exposures for the radiation protection in medicine, because the portion of CT doses in the overall medical exposures are relatively high compared to other radiological diagnoses.