title: DEVELOPMENT OF AGE-SPECIFIC JAPANESE PHYSICAL PHANTOMS FOR DOSE EVALUATION IN INFANT CT EXAMINATIONS.
abstract: Secondary to the previous development of age-specific Japanese head phantoms, the authors designed Japanese torso phantoms for dose assessment in infant computed tomography (CT) examinations and completed a Japanese 3-y-old head-torso phantom. For design of age-specific torso phantoms (0, 0.5, 1 and 3 y old), anatomical structures were measured from CT images of Japanese infant patients. From the CT morphometry, it was found that rib cages of Japanese infants were smaller than those in Europeans and Americans. Radiophotoluminescence glass dosemeters were used for dose measurement of a 3-y-old head-torso phantom. To examine the validity of the developed phantom, organ and effective doses by the in-phantom dosimetry system were compared with simulation values in a web-based CT dose calculation system (WAZA-ARI). The differences in doses between the two systems were <20 % at the doses of organs within scan regions and effective doses in head, chest and abdominopelvic CT examinations.
authors.affiliation: Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan kawaura@met.nagoya-u.ac.jp.
authors.forename: C
authors.initials: C
authors.lastname: Yamauchi-Kawaura
authors.affiliation: Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Fujii
authors.affiliation: Medical Exposure Research Promotion Section, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Akahane
authors.affiliation: Division of Radiology, Aichi Medical University Hospital, Nagakute, Aichi 480-1195, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Yamauchi
authors.affiliation: Medical Exposure Research Promotion Section, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Obara
authors.affiliation: Techno-Rad, Inc., 50-8, Higashi Arami, Tai, Miyama-cho, Kuze-gun, Kyoto 613-0036, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Narai
authors.affiliation: Division of Radiology, Nagoya University Hospital, Tsurumai-cho, Showa-ku, Nagoya 466-8560, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Katsu
authors.affiliation: Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Imai
authors.affiliation: Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Ikeda
mesh_terms: D000886:Anthropometry / Q000379:methods; D002675:Child, Preschool; D003198:Computer Simulation; D005260:Female; D006257:Head; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007564:Japan; D008297:Male; D009010:Monte Carlo Method; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D014018:Tissue Distribution; D014057:Tomography, X-Ray Computed / Q000379:methods*