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Journal Articles

Numerical analysis of organ doses delivered during computed tomography examinations using Japanese adult phantoms with the WAZA-ARI dosimetry system

Takahashi, Fumiaki; Sato, Kaoru; Endo, Akira; Ono, Koji*; Ban, Nobuhiko*; Hasegawa, Takayuki*; Katsunuma, Yasushi*; Yoshitake, Takayasu*; Kai, Michiaki*

Health Physics, 109(2), p.104 - 112, 2015/08

 Times Cited Count:4 Percentile:51.6(Environmental Sciences)

A dosimetry system, named WAZA-ARI, is developed to assess accurately radiation doses to persons from Computed Tomography (CT) examination patients in Japan. Organ doses were prepared to application to dose calculations in WAZA-ARI by numerical analyses using average adult Japanese human models with the Particle and Heavy Ion Transport code System (PHITS). Experimental studies clarified the radiation configuration on the table for some multi-detector row CT (MDCT) devices. Then, a source model in PHITS could specifically take into account for emissions of X-ray in each MDCT device based on the experiment results. Numerical analyses with PHITS revealed a concordance of organ doses with human body size. The organ doses by the JM phantoms were compared with data obtained using previously developed systems. In addition, the dose calculation in WAZA-ARI were verified with previously reported results by realistic NUBAS phantoms and radiation dose measurement using a physical Japanese model. The results implied that analyses using the Japanese phantoms and PHITS including source models can appropriately give organ dose data with consideration of the MDCT device and physiques of typical Japanese adults.

JAEA Reports


; ; ; ; ; ;

PNC-TN9410 92-218, 103 Pages, 1992/04



Oral presentation

R&D of advanced stainless steels for BWR fuel claddings, 3-5; Welding and inspection

Kimura, Akihiko*; Yabuuchi, Kiyohiro*; Sakamoto, Kan*; Yamashita, Shinichiro; Kusagaya, Kazuyuki*

no journal, , 

The joining technique of FeCrAl-ODS stainless steel is considered to be the indispensable technology in the development of the accident tolerant fuel cladding for LWRs. In this study, the strength of end cap joining part welded by the conventional EB weld was measured and X-ray CT checks were performed to the end cap joining part to obtain the relationship between the strength and the microstructure. The end cap welding condition was considered from the obtained results.

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