| Xu Hui,Yue Baorong,Wei Kedao,et al.Investigation and analysis on the dose of the subjects in CT scanning in China[J].Chinese Journal of Radiological Medicine and Protection,2019,39(3):213-217 |
| Investigation and analysis on the dose of the subjects in CT scanning in China |
| Received:April 09, 2018 |
| DOI：10.3760/cma.j.issn.0254-5098.2019.03.010 |
| KeyWords:Computed tomography CT dose index Dose length product 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, Beijing 100088, 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, Beijing 100088, 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, Beijing 100088, 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, Beijing 100088, 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, Beijing 100088, China | |
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| Abstract:: |
| Objective To investigate the CT scanning parameters in hospitals at different levels in 15 provinces and cities in China and the doses to patients undergoing CT examination, in order to provide the basis for establishing CT diagnostic reference level suitable for our country. Methods As required in the implementation program for Technical Study on Medical Radiation Hazard Assessment and Control, the information on the patients examined and the CT scanning parameters in clinical practices were investigated. The CT dose index (CTDI100, CTDIW, CTDIVOL) of CT scanner was measured by using the CT ionization chamber. The dose length product (DLP) was calculated on the basis of the scan length of the patients examined. Results A total of 6 524 CT scanning procedures and 483 different types of CT scanning equipment were surveyed in 166 hospitals in 15 provinces in China. For head, chest, abdomen, and lumbar vertebrae, the average weighted CTDIW were 43,15, 19 and 25 mGy, respectively, and the third quartile of CTDIW were 50, 19, 23 and 32 mGy, respectively. The average DLP were 540, 397, 503 and 376 mGy·cm, respectively. The third quartile of DLP were 659, 525, 632 and 479 mGy·cm respectively. Conclusions Through this survey, the doses to CT-examined patients in some provinces were basicly ascertained. The third quartile of doses to four body parts of the examined patients are different from the diagnostic reference level given in publications in other countries and regions. It is important to establish the CT diagnostic reference level suitable for our CT-examined patients according to Chinese national physical characteristics and therefor to promote the optimization of medical radiation protection in CT examination. |
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