| Wen Xuexin,Yao Jie,Gao Linfeng,Yao Yuhua.Analysis of CT doses to paediatric patients in four children's hospitals in Shanghai[J].Chinese Journal of Radiological Medicine and Protection,2023,43(2):124-130 |
| Analysis of CT doses to paediatric patients in four children's hospitals in Shanghai |
| Received:September 23, 2022 |
| DOI：10.3760/cma.j.cn112271-20220923-00386 |
| KeyWords:Children CT scan Radiation dose Diagnostic reference level Volume computed tomography dose index |
| FundProject:上海市公共卫生体系建设三年行动计划优秀学科带头人计划（GWV-10.2-XD16）；上海市公共卫生重点学科建设计划项目（GWV-10.1-XK10） |
| Author Name | Affiliation | E-mail | | Wen Xuexin | Environmental and Occupational Health Department, Hongkou District Center for Disease Control and Prevention, Shanghai 200082, China | | | Yao Jie | Radiological Health Department, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China | yaojie@scdc.sh.cn | | Gao Linfeng | Radiological Health Department, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China | | | Yao Yuhua | Environmental and Occupational Health Department, Hongkou District Center for Disease Control and Prevention, Shanghai 200082, China | |
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| Abstract:: |
| Objective To study the distribution of CT doses to paediatric patients in Shanghai by investigating the CT dose parameters availiable in Shanghai's children's hospticals, and to provide the basis for establishing the diagnostic reference level for the paediatic patients subjected to CT scanning in Shanghai.Methods In 2021, a general survey was carried out of the CT doses to the head, chest and abdomen of the scanned paediatric patients in four children's hospitals in the municipality. The scanned paediatic patients were divided into four age groups of 0-, 1-, 5- and 10-15 years old, each with 30 subjects. The basic information were collected on the subjects, CT scanning parameters, volume CT dose index (CTDIvol) and dose length product (DLP). SPSS 16.0 was used to carry out statistical analysis of the differences in CTDIvol and DLP between different age groups at the same site and between different hospitals for the same age group at the same site.Results The 75th percentile values of CTDIvol and DLP for 0-, 1-, 5- and 10-15 age groups were 25, 25, 28, 43 mGy and 402, 477, 504, 752 mGy·cm, respectively, for head scanning; 2.7, 2.2, 2.8, 5.4 mGy and 40, 48, 75 and 176 mGy·cm for chest; and 4.9, 4.4, 8.2, 12 mGy and 106, 131, 273, 471 mGy·cm for abdomen. There were significant differences in CTDIvol and DLP between different age groups at the same site and between different hospitals for the same age group at the same site (head, chest and abdomen CTDIvol:χ2=221.68, 167.27, 127.07, DLP:χ2=220.63, 261.46, 216.61; for four age groups, CTDIvol:head χ2=30.46, 38.39, 25.21, 73.04, chest χ2=30.46, 35.69, 58.92, and 48.03, abdomen χ2=66.58, 41.62, 48.93, and 67.38; DLP:head χ2=28.82, 72.49, 47.72, 52.34, chest χ2=28.82, 35.95, 50.66, 41.64, abdomen χ2=45.53, 26.02 39.34, 44.24, P <0.05).Conclusions The 75th percentile values of CTDIvol and DLP for head, chest and abdomen in 4 children's hospitals in Shanghai are lower or close to the values given in the relevant national standards and the diagnostic reference levels in some European countries, with higher DLP values on some scanning sites. The CT scanning procedures for paediatric patients needs to be further optimized. |
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