PREFECTURE-WIDE MULTI-CENTRE RADIATION DOSE SURVEY AS A USEFUL TOOL FOR CT DOSE OPTIMISATION: REPORT OF GUNMA RADIATION DOSE STUDY.

Radiation protection dosimetry

PubMedID: 25344887

Fukushima Y, Taketomi-Takahashi A, Nakajima T, Tsushima Y. PREFECTURE-WIDE MULTI-CENTRE RADIATION DOSE SURVEY AS A USEFUL TOOL FOR CT DOSE OPTIMISATION: REPORT OF GUNMA RADIATION DOSE STUDY. Radiat Prot Dosimetry. 2014;.
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.