| LIU Chang-sheng,LI Mao-jin,ZHENG Xiao-hua.Comparative study of pediatric lung CT scanning parameters and radiation doses[J].Chinese Journal of Radiological Medicine and Protection,2005,25(5):460-462 |
| Comparative study of pediatric lung CT scanning parameters and radiation doses |
| Received:January 17, 2005 |
| DOI： |
| KeyWords:Tomography X-ray Computer Radioprotection |
| FundProject: |
| Author Name | Affiliation | | LIU Chang-sheng | Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, China | | LI Mao-jin | Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, China | | ZHENG Xiao-hua | Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, China | | 魏文洲 | Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, China | | 童四平 | Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, China | | 潘鄂武 | Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, China | | 唐兴桥 | Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, China |
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| Abstract:: |
| Objective To optimize CT scanning parameters in pediatric lung examination and reduce its radiation hazards. Methods According to mean anterior-posterior diameter and transverse diameter of thoracic cavity, 210 children with clinically suspected lung diseases were scanned by CT. The initial CT scanning dose was 70% of the conventional dose in lung examination. Then the scanning dose per scan was reduced by 10 mAs each until the quality of CT images was beyond the diagnosis demands, and the exposed doses, single scanning CT dose index weighted (CTDIW) and dose length product (DLP) were analysed. Results Compared with conventional lung CT scanning,the exposure value was reduced to 45%-80% according to individual development of pediatric lung, CTDIW and DLP of low dose scanning in pediatrics were reduced to 27.45%-80% respectively. Conclusion According to individual development of pediatric lung, CT scanning dose properly decreased in lung examination could reduce hazards of radiation to children. |
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