Yamauchi-Kawaura C, Fujii K, Akahane K, Yamauchi M, Obara S, Narai K, Katsu T, Imai K, Ikeda M
Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan
Department of Radiological Sciences, Graduate School of Medicine, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan.
Radiat Prot Dosimetry. 2016 Dec;171(4):483-502. doi: 10.1093/rpd/ncv420. Epub 2015 Sep 28.
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.
在先前开发特定年龄的日本头部体模的基础上，作者设计了用于婴儿计算机断层扫描（CT）检查剂量评估的日本躯干体模，并完成了一个3岁日本儿童的头部 - 躯干体模。为了设计特定年龄的躯干体模（0、0.5、1和3岁），从日本婴儿患者的CT图像中测量了解剖结构。通过CT形态测量发现，日本婴儿的胸廓比欧洲人和美国人的小。使用放射光致发光玻璃剂量计对3岁头部 - 躯干体模进行剂量测量。为了检验所开发体模的有效性，将体模内剂量测定系统测得的器官剂量和有效剂量与基于网络的CT剂量计算系统（WAZA - ARI）中的模拟值进行了比较。在扫描区域内器官剂量以及头部、胸部和腹盆腔CT检查中的有效剂量方面，两个系统之间的剂量差异小于20%。
