Size-specific dose estimates of chest CT in children based on radiation dose structured reports
10.3760/cma.j.issn.0254-5098.2020.09.010
- VernacularTitle:基于辐射剂量结构化报告的未成年人胸部CT检查体型特异性剂量分析
- Author:
Yi LIU
1
;
Shizhong HAN
;
Xin ZHANG
;
Yi ZHANG
Author Information
1. 山东省疾病预防控制中心，济南 250014
- From:
Chinese Journal of Radiological Medicine and Protection
2020;40(9):707-711
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To compare the size-specific dose estimates (SSDE) among children groups with different age ranges by radiation dose structured reports (RDSR) and automatic collection of key images.Methods:Four hundred and four patients (age range 0 to 18 years) were enrolled through automatically capturing the radiation dose structured reports with Teamplay software on the PACS, and the water equivalent diameter (WED) and SSDE were calculated by measurement on the CT axial images. The differences of SSDE and other radiation parameters in different groups were analyzed by using ANOVA method, and the relationship between SSDE and CTDI vol was analyzed by Pearson correlation coefficient. Results:The mean value of SSDE for all subjects was (4.70±3.29) mGy, and increased with the increase of age, showing significant differences among different age groups ( F=46.11, P<0.01). There was a highly linear correlation between SSDE and CTDI vol from 1 year to 18 years old (| r|≥0.92, P<0.01). Conclusions:This study provides a method to apply SSDE to scan quality control in daily work. The result shows that the SSDE level in some age groups can be converted linearly by CTDI vol, and the conversion factor varies with different age groups. The difference between SSDE and CTDI vol gradually decreases with age, so SSDE is more suitable for evaluating the radiation dose of CT examination for children.
