[科研小组报告：日本全国小儿CT检查辐射暴露调查（2018年）]
[Scientific Research Group Report: Nationwide Survey on Radiation Exposure of Pediatric CT Examination in Japan (2018)].
作者信息
Takei Yasutaka, Miyazaki Osamu, Matsubara Kosuke, Suzuki Shoichi, Muramatsu Yoshihisa, Fukunaga Masaaki, Akahane Masaaki
机构信息
Department of Radiological Technology, Faculty of Medical Science and Technology, Kawasaki University of Medical Welfare.
Department of Radiology, National Center for Child Health and Development.
出版信息
Nihon Hoshasen Gijutsu Gakkai Zasshi. 2022 Apr 20;78(4):372-380. doi: 10.6009/jjrt.2022-1181. Epub 2022 Mar 3.
PURPOSE
To understand the latest pediatric computed tomography (CT) exposure required for the revision of national DRLs.
METHODS
A questionnaire was sent to 409 facilities where the members of the Japanese Society of Radiological Technology and the Japanese Society of Pediatric Radiology are enrolled. We investigated the imaging conditions, CTDI, and DLP of the pediatric head, chest, and abdominal CT examinations.
RESULTS
In all, 43 facilities (11%) responded to our survey. multi detector-row CT (MDCT) systems were available in all surveyed facilities. More than 98% of the MDCT systems had more than 64 detector rows. The CTDI of all CT protocols was lower than the NDRL due to the progress of updating to MDCTs with radiation exposure reduction functions such as an iterative reconstruction, but the DLP of head and abdominal CT protocols of some age group were higher than NDRL.
CONCLUSION
It is necessary to review the imaging protocol with the attending physician and radiologist and consider further optimization of medical exposure.
目的
了解修订国家剂量参考水平（DRLs）所需的最新儿科计算机断层扫描（CT）照射情况。
方法
向409家日本放射技术学会和日本儿科放射学会成员所在的机构发送了一份调查问卷。我们调查了儿科头部、胸部和腹部CT检查的成像条件、容积CT剂量指数（CTDI）和剂量长度乘积（DLP）。
结果
共有43家机构（11%）回复了我们的调查。所有接受调查的机构都配备了多排探测器CT（MDCT）系统。超过98%的MDCT系统拥有64排以上探测器。由于向具有如迭代重建等辐射剂量降低功能的MDCT更新的进展，所有CT检查方案的CTDI均低于国家剂量参考水平（NDRL），但某些年龄组的头部和腹部CT检查方案的DLP高于NDRL。
结论
有必要与主治医生和放射科医生一起审查成像方案，并考虑进一步优化医疗照射。
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