Fukushima Yasuhiro, Taketomi-Takahashi Ayako, Nakajima Takahito, Tsushima Yoshito
Department of Radiology, Gunma University Hospital, 3-39-15 Showa, Maebashi, Gunma 371-8511, Japan Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa, Maebashi, Gunma 371-8511, Japan
Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa, Maebashi, Gunma 371-8511, Japan.
Radiat Prot Dosimetry. 2015 Dec;167(4):519-24. doi: 10.1093/rpd/ncu323. Epub 2014 Oct 24.
The aim of this study was to verify the usefulness for the dose optimisation of setting a diagnostic reference level (DRL) based on the results of a prefecture-wide multi-centre radiation dose survey and providing data feedback. All hospitals/clinics in the authors' prefecture with computed tomography (CT) scanners were requested to report data. The first survey was done in July 2011, and the results of dose-length products (DLPs) for each CT scanner were fed back to all hospitals/clinics, with DRL set from all the data. One year later, a second survey was done in the same manner. The medians of DLP in the upper abdomen, whole body and coronary CT in 2012 were significantly smaller than those of the 2011 survey. The interquartile ranges of DLP in the head, chest, pelvis and coronary CT were also smaller in 2012. Radiation dose survey with data feedback may be helpful for CT dose optimisation.
本研究的目的是验证基于全地区多中心辐射剂量调查结果设定诊断参考水平（DRL）并提供数据反馈对剂量优化的有效性。要求作者所在地区所有配备计算机断层扫描（CT）扫描仪的医院/诊所上报数据。首次调查于2011年7月进行，将各CT扫描仪的剂量长度乘积（DLP）结果反馈给所有医院/诊所，并根据所有数据设定DRL。一年后，以同样的方式进行了第二次调查。2012年上腹部、全身和冠状动脉CT的DLP中位数显著低于2011年调查结果。2012年头部、胸部、骨盆和冠状动脉CT的DLP四分位间距也更小。进行有数据反馈的辐射剂量调查可能有助于CT剂量优化。
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