Sahota N, Burbridge B E, Duncan M D
Department of Medical Imaging, Royal University Hospital, 103 Hospital Road, Saskatoon, Saskatchewan, S7N 0W8, Canada.
J Radiol Prot. 2014 Jun;34(2):333-7. doi: 10.1088/0952-4746/34/2/333. Epub 2014 Apr 4.
A previous audit revealed a high frequency of adult fingers visualised on neonatal intensive care unit (NICU) chest radiographs-representing an example of inappropriate occupational radiation exposure. Radiation safety education was provided to staff and we hypothesised that the education would reduce the frequency of adult fingers visualised on NICU chest radiographs. Two cross-sectional samples taken before and after the administration of the education were compared. We examined fingers visualised directly in the beam, fingers in the direct beam but eliminated by technologists editing the image, and fingers under the cones of the portable x-ray machine. There was a 46.2% reduction in fingers directly in the beam, 50.0% reduction in fingers directly in the beam but cropped out, and 68.4% reduction in fingers in the coned area. There was a 57.1% overall reduction in adult fingers visualised, which was statistically significant (Z value - 7.48, P < 0.0001). This study supports radiation safety education in minimising inappropriate occupational radiation exposure.
此前的一项审计显示，新生儿重症监护病房（NICU）胸部X光片上成人手指的出现频率很高，这是不适当职业辐射暴露的一个例子。已向工作人员提供了辐射安全教育，我们推测该教育将降低NICU胸部X光片上成人手指的出现频率。对在开展教育前后采集的两个横断面样本进行了比较。我们检查了直接在射束中的手指、在直接射束中但被技术人员编辑图像时消除的手指以及便携式X光机锥形范围内的手指。直接在射束中的手指减少了46.2%，直接在射束中但被裁剪掉的手指减少了50.0%，锥形区域内的手指减少了68.4%。成人手指的总体出现率降低了57.1%，具有统计学意义（Z值为 - 7.48，P < 0.0001）。本研究支持通过辐射安全教育将不适当的职业辐射暴露降至最低。
