Dose survey and analysis for patients with CT examinations in Shaanxi Province, China
10.13491/j.issn.1004-714X.2025.06.013
- VernacularTitle:陕西省CT受检者剂量调查与分析
- Author:
Yanpeng TIAN
1
;
Yi XU
1
;
Zhigang JI
1
Author Information
1. Radiation and Occupational Health Institute, Shaanxi Provincial Center for Disease Control and Prevention, Xi'an 710054, China.
- Publication Type:OriginalArticles
- Keywords:
Radiation dose;
Volume computed tomography dose index;
Dose-length product;
Computed tomography
- From:
Chinese Journal of Radiological Health
2025;34(6):856-863
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish baseline radiation dose data for computed tomography (CT) examinations in Shaanxi Province, China and to provide scientific evidence for optimizing medical radiation protection. Methods From 2020 to 2023, a multicenter cross-sectional study was conducted using 16 CT scanners across 9 hospitals (2 specialized pediatric hospitals and 7 general hospitals). Standardized registration forms were used to collect basic information (e.g., age and examination site), scanning parameters (e.g., tube voltage, tube current-time product, and scan length), and dosimetric parameters (volume CT dose index [CTDIvol] and dose-length product [DLP]). Non-parametric tests were employed for intergroup comparisons. Results A significant positive correlation was observed between age and major CT scanning parameters. Both CTDIvol and DLP increased significantly with age across all examination sites (P < 0.001). Abdominal CTDIvol was significantly lower in specialized pediatric hospitals than in general hospitals (8.0 vs. 15.5 mGy, P < 0.001). The < 1-year age group showed higher abdominal CTDIvol (13.2 vs. 8.6 mGy) but lower DLP (243.5 vs. 261.9 mGy·cm) compared to the 1- < 5-year group. Conclusion This study established the first baseline radiation dose database for CT examinations in Shaanxi Province, providing critical scientific support for developing regional diagnostic reference levels and optimizing radiological protection practices.
