Lewis Shantel, Pieterse Tracey, Lawrence Heather
Department of Medical Imaging and Radiation Sciences, Faculty of Health Sciences, University of Johannesburg, Johannesburg, Gauteng, South Africa.
J Med Radiat Sci. 2019 Mar;66(1):38-43. doi: 10.1002/jmrs.317.
Digital radiography lacks visual clues of exposure techniques used to obtain radiographs, therefore manufacturers have included exposure indicators (EIs). EIs provides feedback about exposure techniques used and evaluating EIs will yield much needed information about exposure trends used in digital radiography.
A retrospective explorative quantitative study was conducted at nine randomly selected imaging departments in Gauteng, South Africa. Data pertaining to EI was retrospectively collected using quota sampling and compared to manufacturer recommended (MR) standards.
A total of 1422 EIs were collected. 50% of these were within the MR standard. 27% of EI indicated overexposure and 23% indicated underexposure.
Greater evidence of overexposure was noted in the retrospective analysis of the EI. This pilot study shows the need for further investigation into exposure technique practices in digital radiography and the need for measures to halt the evidenced overexposure.
数字放射摄影缺乏用于获取射线照片的曝光技术的视觉线索，因此制造商已纳入曝光指标（EI）。EI提供有关所使用曝光技术的反馈，评估EI将产生有关数字放射摄影中使用的曝光趋势的急需信息。
在南非豪登省随机选择的9个成像部门进行了一项回顾性探索性定量研究。使用配额抽样回顾性收集与EI相关的数据，并与制造商推荐（MR）标准进行比较。
共收集到1422个EI。其中50%在MR标准范围内。27%的EI表明过度曝光，23%表明曝光不足。
在EI的回顾性分析中发现了更多过度曝光的证据。这项初步研究表明需要进一步调查数字放射摄影中的曝光技术实践，以及采取措施阻止已证实的过度曝光。
