DEVELOPMENT OF A JAPANESE INFANT HEAD?CHEST PHANTOM AND INVESTIGATION OF THE CURRENT STATUS OF INFANT HEAD CT EXAMINATIONS IN JAPAN
DEVELOPMENT OF A JAPANESE INFANT HEAD?CHEST PHANTOM AND INVESTIGATION OF THE CURRENT STATUS OF INFANT HEAD CT EXAMINATIONS IN JAPAN
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日本婴儿头部胸部体模的研制及日本婴儿头部CT检查现状调查
DOI：
10.1093/rpd/ncz261
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发表时间：
2019
影响因子：
1
通讯作者：
Hidetoshi Shimizu
中科院分区：
文献类型：
--
作者：
Chiyo Yamauchi-Kawaura;Keisuke Fujii;Masato Yamauchi;Kuniharu Imai;Mitsuru Ikeda;Kazuhiro Narai;Hidetoshi Shimizu
本研究的目的是开发一个头胸体模，可以模仿日本0.5岁儿童的体格，并调查日本婴儿头部计算机断层扫描检查的暴露剂量的现状。体模由机械加工制成，体模内安装辐射光致发光玻璃剂量计进行剂量测量。在三家医院常规使用的七种不同的头部扫描方案中测量器官剂量。在本研究中，扫描区域内大脑和透镜的平均剂量与先前研究中使用婴儿体模测量的剂量相当。与此相反，邻近扫描区域的唾液腺和甲状腺的剂量比以前的研究高1.4-1.8倍。扫描区域的扩大伴随着扫描模式从非螺旋到螺旋的转变可能导致器官剂量的差异。
The aim of this study was to develop a head–chest phantom that could mimic the physique of a Japanese 0.5-year-old child and to investigate the current status of exposure dose in infant head computed tomography examinations in Japan. The phantom was produced by machine processing, and radiophotoluminescence glass dosemeters were installed in the phantom for dose measurement. Organ doses were measured for seven different head scan protocols routinely used in three hospitals. In this study, the average dose of the brain and lens within the scan region was equivalent to that measured using infant phantoms in previous studies. In contrast, the doses of both salivary glands and thyroid glands adjacent to the scan region were 1.4–1.8 times higher than those in previous studies. Expansion of the scan area accompanied by a transition of the scan mode from non-helical to helical may have resulted in the differences in organ doses.