| Xu Hui,Yue Baorong,Wei Kedao,Wang Jianchao,Fan Yaohua.Investigation and analysis on entrance surface dose of patients in radiography procedures in China[J].Chinese Journal of Radiological Medicine and Protection,2019,39(1):68-72 |
| Investigation and analysis on entrance surface dose of patients in radiography procedures in China |
| Received:April 09, 2018 |
| DOI：10.3760/cma.j.issn.0254-5098.2019.01.013 |
| KeyWords:Screen-film radiography Computed radiography (CR) Digital radiography (DR) Entrance surface dose (ESD) Diagnostic reference level |
| FundProject:卫生行业科研专项（201002009） |
| Author Name | Affiliation | E-mail | | Xu Hui | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, 100088 Beijing, China | | | Yue Baorong | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, 100088 Beijing, China | bryue@163.com | | Wei Kedao | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, 100088 Beijing, China | | | Wang Jianchao | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, 100088 Beijing, China | | | Fan Yaohua | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, 100088 Beijing, China | |
|
| Hits: 3467 |
| Download times: 1494 |
| Abstract:: |
| Objective To investigate the entrance surface dose to the examined patients in radiography using digital and screen-film system in hospitals at different levels in 15 provinces and municipalities in China, in order to provide data for developing diagnostic reference level of radiography suitable for our national physical characteristics.Methods According to the requirements of the Technical Study on Medical Radiation Hazard Assessment and Control, the examined patients aged 20-70 years were selected, with body weight ranging from 55 to 80 kg for male and 50 to 70 kg for female. TLDs were used to measure the entrance surface dose to adult patients in radiography. No less than 10 examined patients were required at each body position, with examined locations including head (PA, LAT), chest (PA, LAT), abdomen (AP), pelvis (AP), lumbar (AP, LAT), and thoracic vertebra (AP, LAT).Results A total of 19 975 individuals undergoing radiography and 1 813 radiographic equipment of different types including screen-film radiography, computed radiography (CR) and digital radiography (DR), were investigated in 342 hospitals in 15 provinces and municipalities throughout the country. For these three types of equipment, the average entrance surface dose to the examined were 1.75, 1.9, and 1.15 mGy in head (PA), 1.69, 1.46 and 1.03 mGy in head (LAT), 0.75, 0.65 and 0.36 mGy in chest (PA), 1.81, 1.26 and 0.88 mGy in chest (LAT), 4.37, 3.77 and 2.15 mGy in abdomen (AP), 3.73, 3.56 and 2.75 mGy in pelvis (AP), 5.49, 5.84 and 4.17 mGy in lumbar (AP), 12.01, 9.37 and 6.82 mGy in lumbar (LAT), 4.53, 3.65 and 2.49 mGy in thoracic vertebra (AP), and 6.91, 6.43 and 4.15 Gy in thoracic vertebra (LAT).Conclusions Entrance surface dose caused by radiography examination varies dependent on different exposure locations. Entrance surface doses caused by digital radiography are all lower than by screen-film radiography; those caused by digital radiography are lower than by computed radiography, except for thoracic vertebra (AP). In all examinations, no difference of statistical significance is found between CR and screen-film radiography in entrance surface dose. |
| HTML View Full Text View/Add Comment Download reader |
| Close |
|
|
|
