title: Prefecture-wide multi-centre radiation dose survey as a useful tool for CT dose optimisation: report of Gunma radiation dose study.
abstract: 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.
authors.affiliation: 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 yfukushi@gunma-u.ac.jp.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Fukushima
authors.affiliation: Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa, Maebashi, Gunma 371-8511, Japan.
authors.forename: Ayako
authors.initials: A
authors.lastname: Taketomi-Takahashi
authors.affiliation: Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa, Maebashi, Gunma 371-8511, Japan.
authors.forename: Takahito
authors.initials: T
authors.lastname: Nakajima
authors.affiliation: Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, 3-39-22 Showa, Maebashi, Gunma 371-8511, Japan.
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Tsushima
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D005260:Female; D005720:Gamma Rays; D006257:Head / Q000000981:diagnostic imaging; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D010388:Pelvis / Q000000981:diagnostic imaging; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods; D011835:Radiation Protection / Q000592:standards*; D011860:Radiography, Abdominal / Q000379:methods / Q000592:standards; D013902:Radiography, Thoracic / Q000379:methods / Q000592:standards; D011795:Surveys and Questionnaires; D015898:Tomography Scanners, X-Ray Computed / Q000592:standards*; D014057:Tomography, X-Ray Computed / Q000379:methods* / Q000592:standards*; D055815:Young Adult