| Qiu Haijing,Gao Zhiling,Jia Jing,Gao Yujia,Ren Tao,Sun Wenjie,Yang Guanhua,Deng Lin,Chen Yong.Analysis of radiation doses from head and chest CT scanning for children in Ningxia[J].Chinese Journal of Radiological Medicine and Protection,2020,40(11):851-856 |
| Analysis of radiation doses from head and chest CT scanning for children in Ningxia |
| Received:January 07, 2020 |
| DOI：10.3760/cma.j.issn.0254-5098.2020.11.007 |
| KeyWords:Computed tomography Radiation dose Diagnostic reference level Radiation dose optimization |
| FundProject:国家自然科学基金项目（61761039）；宁夏自治区重点研发计划项目（2018BFH03021）；宁夏高等学校科学研究项目（NGY2016130） |
| Author Name | Affiliation | E-mail | | Qiu Haijing | Department of Radiology, Second Affiliated Hospital of Xi'an Medical College, Xi'an 710038, China | | | Gao Zhiling | Department of Radiology, General Hospital of Ningxia Medical University, Yinchuan 750004, China | gzl6988@163.com | | Jia Jing | Department of Radiology, General Hospital of Ningxia Medical University, Yinchuan 750004, China | | | Gao Yujia | Clinical Medical College of Ningxia Medical University, Yinchuan 750004, China | | | Ren Tao | Clinical Medical College of Ningxia Medical University, Yinchuan 750004, China | | | Sun Wenjie | Clinical Medical College of Ningxia Medical University, Yinchuan 750004, China | | | Yang Guanhua | Clinical Medical College of Ningxia Medical University, Yinchuan 750004, China | | | Deng Lin | Clinical Medical College of Ningxia Medical University, Yinchuan 750004, China | | | Chen Yong | Department of Radiology and Intervention, General Hospital of Ningxia Medical University, Yinchuan 750004, China | |
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| Abstract:: |
| Objective To evaluate the radiation doses from head and chest CT examinations of children in Ningxia, and provide basic data for the optimization of CT radiation doses to children of different ages. Methods By using stratified cluster sampling method , the dose parameters on head and chest CT scanning, CTDIvol and DLP for the children under 15 years old were sampled within 1-2 weeks from hospitals at different levels in different regions of Ningxia for the calculation of effective doses. The 75th percentile (P75) of CTDIvol and DLP was compared with those recommended by other countries. All children included four age groups: up to 1 year old, 1 to 5 years, 6 to 10 years, 11 to 15 years. ResultsThere were 39 hospitals and 47 CT scanners in this survey, and 1 134 head scanning and 636 chest scanning were investigating. The 75th percentile (P75) of CTDIvol and DLP for head scanning were 44.2 mGy and 456.2 mGy·cm for those up to 1 year old; 57.2 mGy and 659.6 mGy·cm for 1 to 5 years old, 61.1 mGy and 668.7 mGy·cm for 6-10 years old, and 63.6 mGy and 849.3 mGy·cm for 11-15 years old, respectively. The 75th percentile (P75) of CTDIvol and DLP for chest scanning were 5.0 mGy and 89.2 mGy·cm for those up to 1 year old, 5.9 mGy and 124.8 mGy·cm for 1 to 5 years old, 6.0 mGy and 167.9 mGy·cm for 6 to 10 years, and 7.1 mGy and 235.0 mGy·cm for 11 to 15 years old, respectively. Conclusions The chest CT radiation dose to children in Ningxia is close to the reported values, but the head CT radiation dose is relatively high in all age groups, especially in infants. The optimization and regulation of head CT radiation doses to children in Ningxia should be strengthened. It is high time to increase dose awareness for pediatricians and radiologists and raise awareness of radiation-related risks. |
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