Investigation on radiation doses and related influencing factors for CT adult examinations in Huai′an city
10.3760/cma.j.cn112271-20220410-00151
- VernacularTitle:淮安市CT检查致成年受检者的剂量水平及其影响因素调查研究
- Author:
Binbin HUO
1
;
Zhiyong XU
;
Dongdong HE
;
Xiaomin CHEN
Author Information
1. 淮安市疾病预防控制中心职业卫生科，淮安 223001
- Keywords:
Volume CT dosimetry index;
Diagnostic reference level;
Effective dose;
Collective effective dose
- From:
Chinese Journal of Radiological Medicine and Protection
2023;43(1):45-50
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the level of radiation doses to adults caused by CT examination in Huai′an, and explore the local CT diagnostic reference levels (DRLs).Methods:Totally 45 CT scaners were selected to investigate the information on hospitals, equipment, scanning parameters, and radiation doses. Empirical formula were used to estimate the effective dose to adults. Nonparametric rank sum tests were used to analyze differences in radiation dose level between CT service age and hospital grade.Results:A total of 3 483 patients were collected, including 890 for head examinations, 890 for chest, 846 for abdomen, and 857 for lumbar spine. The 75% percentile values of CTDI vol to adult patients from CT scanning for head, chest, abdomen, lumbar spine examinations were 63.0, 12.4, 20.0 and 24.0 mGy, respectively. The 75% percentile values of DLP were 858.6, 416.0, 620.7 and 559.2 mGy·cm, respectively. The 75% percentile values of DLP for males was higher than those for females. There were significant statistical differences in radiation doses dependent on equipment service (head: U =10 326.00, P<0.05; chest: U=36 094.50, P<0.05; abdomen: U= 7 859.00, P<0.05; lumbar spine: U=42 408.00, P<0.05), and hospital grade (head: H=14.280, P<0.05; chest: H=17.85, P<0.05; abdomen: H=97.18, P<0.05; lumbar spine: H=138.94, P<0.05). Conclusions:The CT radiation dose levels in Huai′an city is basically consistent with standard-reommended values, which is in line with the current status of CT equipment dose levels in the country. It is necessary to strengthen the quality control and maintenance of CT equipment.
