Liu Yi,Han Shizhong,Zhang Xin,Zhang Yi.Size-specific dose estimates of chest CT in children based on radiation dose structured reports[J].Chinese Journal of Radiological Medicine and Protection,2020,40(9):707-711
Size-specific dose estimates of chest CT in children based on radiation dose structured reports
Received:February 06, 2020  
DOI：10.3760/cma.j.issn.0254-5098.2020.09.010
KeyWords:Structured report  Children  Size-specific dose estimates  Radiation dose
FundProject:山东省重点研发计划项目（2016GSF201092）
Author NameAffiliationE-mail
Liu Yi Shandong Center for Disease Control and Prevention, Jinan 250014, China  
Han Shizhong Shandong Medical Imaging Research Institute, Jinan 250021, China  
Zhang Xin Shandong Medical Imaging Research Institute, Jinan 250021, China  
Zhang Yi Shandong Medical Imaging Research Institute, Jinan 250021, China zhangyisd@139.com 
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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 CTDIvol 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 CTDIvol 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 CTDIvol, and the conversion factor varies with different age groups. The difference between SSDE and CTDIvol gradually decreases with age, so SSDE is more suitable for evaluating the radiation dose of CT examination for children.
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