| Wang Kexin,Xiang Shiyi,Lin Shuangxiang,et al.Diagnostic reference levels and dose trends for routine ct examinations[J].Chinese Journal of Radiological Medicine and Protection,2026,46(5):478-482 |
| Diagnostic reference levels and dose trends for routine ct examinations |
| Received:November 03, 2025 |
| DOI：10.3760/cma.j.cn112271-20251103-00386 |
| KeyWords:Computed tomography Dose Diagnostic reference levels Image quality |
| FundProject:浙江省自然科学基金(LQN25H180006) |
| Author Name | Affiliation | E-mail | | Wang Kexin | Department of Radiology, Second 2 nd Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China | | | Xiang Shiyi | First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou 310009, China | | | Lin Shuangxiang | Department of Radiology, Second 2 nd Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China | | | Xu Mengxi | Department of Radiology, Second 2 nd Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China | | | Lou Xiaolong | Department of Radiology, Second 2 nd Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China | | | Ma Linlin | Department of Radiology, Second 2 nd Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China | | | Wang Xinhong | Department of Radiology, Second 2 nd Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China | 2611104@zju.edu.cn |
|
| Hits: 229 |
| Download times: 25 |
| Abstract:: |
| Objective To assess the radiation dose levels of routine CT examinations in the Department of Radiology of our institution over the past three years, with the aim of establishing local diagnostic reference levels (DRLs) to monitor and optimize radiological protection practices and ensure patient safety. Methods A retrospective collection of dose-length product (DLP) data was performed for ten common examination types conducted from 2022 to 2024: non-contrast axial head, neck, high-resolution chest (HRCT), abdomen, pelvis, lumbar spine, prospective coronary Computed Tomography Angiography CTA, cranial CTA, neck CTA, and thoracoabdominal CTA. The 25th (P25), 50th (median,P50), and 75th (P75) percentile values were calculated, with the P75 value designated as the local DRL for subsequent analysis. These local DRLs were compared against the national standard for adult DRLs published by the National Health Commission of China in 2018 (WS/T637-2018). Furthermore, the trend in DRL values for each examination type over the three-year period was analyzed. Results This study included a total of 936,263 examinations. The results demonstrated that the local DRLs (P75) for DLP across all ten examined areas were significantly lower than the corresponding values in the WS/T637-2018 national standard. Compared with the 2023 Beijing DRL data, the DRL values for most examination sites at this institution were lower or roughly comparable, with only a few sites (e.g., head) being slightly higher than the Beijing levels. Overall, however, the radiation doses remained within a reasonable and controllable range. Additionally The differences in radiation doses among various anatomical sites over the past three years were statistically significant.Conclusions The radiation dose control for CT examinations in our institution is effective. The diagnostic reference levels for all examined areas are superior to the national standard, reflecting high-quality management of radiation protection. |
| HTML View Full Text View/Add Comment Download reader |
| Close |
|
|
|
