PDF(Pubmed)
Abstract：
Despite its undeniable advantages, the operation of a CT scanner also carries risks to human health. The CT scanner is a source of ionizing radiation, which also affects people in its surroundings. The aim of this paper is to quantify the radiation exposure of workers at a 3D CT wood scanning workplace and to determine a monitoring program based on measurements of ionizing radiation levels during the operation of a CT log scanner. The workplace is located in the Biotechnology Park of the National Forestry Centre. The ionizing radiation source is located in a protective cabin as a MICROTEC 3D CT machine with an X-ray lamp as X-ray source. The CT scanner is part of the 3D CT scanning line and its function is continuous quality scanning or detection of internal defects of the examined wood. The measurement of leakage radiation during scanning is performed with a metrologically verified meter. The measured quantity is the ambient dose equivalent rate H˙*10. The results of the measurements at the selected measurement sites have shown that, after installation of additional safety barriers, the CT scanner for the logs complies with the most strict criteria in terms of radiation protection. Workers present at the workplace during the operation of the CT scanner are not exposed to radiation higher than the background radiation level.
摘要：
尽管其无可否认的优势，CT扫描仪的操作也会给人类健康带来风险。CT扫描仪是电离辐射源,这也会影响周围的人。本文的目的是量化3DCT木材扫描工作场所工人的辐射暴露，并根据CT测井扫描仪操作过程中的电离辐射水平测量结果确定监测程序。工作场所位于国家林业中心的生物科技园。电离辐射源位于保护舱内，作为MICROTEC3DCT机，带有X射线灯作为X射线源。CT扫描仪是3DCT扫描线的一部分，其功能是连续质量扫描或检测所检查木材的内部缺陷。在扫描期间的泄漏辐射的测量是用计量验证的仪表执行的。测量的数量是环境剂量当量率H•*10。在选定的测量地点的测量结果表明,安装额外的安全屏障后，日志的CT扫描仪符合辐射防护方面最严格的标准。在CT扫描仪操作期间出现在工作场所的工人不暴露于高于背景辐射水平的辐射。
