CT理论与应用研究2026，Vol.35Issue(3)：461-467,7.DOI:10.15953/j.ctta.2024.272
体型因素及组织成分对成人胸部CT水当量直径的体型特异性剂量估算的影响
Impact of Individual Body Shape Factors and Tissue Contents on the Water Equivalent Diameter of Size-specific Dose Estimations in Adult Chest CT
摘要
Abstract
Objective:To investigate the impact of individual body size factors and tissue composition on the size-specific dose estimate(SSDEWED)based on water equivalent diameter for adult chest.Methods:A total of 205 adult subjects who underwent chest CT scans at our hospital were enrolled,and their individual information(height,weight,body mass index)was collected.The average CTROI value,cross-sectional area AROI,right left diameter,and anteroposterior diameter of the thorax on the axial images at the intermediate level were collected.The fat content,fat volume,muscle content,and muscle volume across the entire scanning range were recorded.The anteroposterior diameter/right left diameter,scan length,and scan length/right left diameter were calculated.The volume CT dose index(CTDIvol)of the subjects was obtained,and the SSDEWED values at the mid-level of all subjects were calculated.The correlations between fat content,muscle content,fat volume,muscle volume,BMI,cross-sectional ares AROI,right left diameter,anteroposterior diameter,scan length,scan length/right left diameter ratio,anteroposterior diameter/right left diameter ratio,and SSDEWED were analyzed.Results:Fat content,fat volume,muscle volume,BMI,cross-sectional AROI,right left diameter,anteroposterior diameter,scan length/right left diameter ratio are significantly positively correlated with SSDEWED.Muscle content,anteroposterior/right left diameter ratio,and scan length showed no correlation with SSDEWED.Conclusion:Multiple individual body size factors and tissue compositions are significantly correlated with SSDEWED,among which adipose tissue is the key factor influencing SSDEWED.关键词
水当量直径/容积CT剂量指数/体型特异性辐射剂量估算/脂肪含量Key words
water equivalent diameter/volume CT dose index/size-specific radiation dose estimation/fat content分类
医药卫生引用本文复制引用
姜阳,唐文韬,胡然,胡勤勤,李刚静,张昊,余婷,张德川..体型因素及组织成分对成人胸部CT水当量直径的体型特异性剂量估算的影响[J].CT理论与应用研究,2026,35(3):461-467,7.基金项目
成都中医药大学"杏林学者"医院专项(多维度个体因素对水当量直径的体型特异性成人胸部辐射剂量的影响研究(YYZX2022136)) （多维度个体因素对水当量直径的体型特异性成人胸部辐射剂量的影响研究(YYZX2022136）
重庆教育委员会科学技术研究计划(肝硬化肾损伤磁共振灌注成像评估(KJQN202415136)) （肝硬化肾损伤磁共振灌注成像评估(KJQN202415136）
重庆市科卫联合医学科研重点项目(基于人工神经网络的个性化成人胸部低剂量CT扫描模型构建及其应用研究(2024ZDXM001)) （基于人工神经网络的个性化成人胸部低剂量CT扫描模型构建及其应用研究(2024ZDXM001）
重庆自然科学基金面上项目(基于水当量直径的体型特异性成人胸部CT有效剂量估算模型的研究(cstc2021jcyj-msxmX0727)) （基于水当量直径的体型特异性成人胸部CT有效剂量估算模型的研究(cstc2021jcyj-msxmX0727）
重庆自然科学基金面上项目(基于水当量直径的体型特异性剂量估算成人胸部个性化的低剂量阈值模型研究(CSTB2023NSCQ-MSX0295)). （基于水当量直径的体型特异性剂量估算成人胸部个性化的低剂量阈值模型研究(CSTB2023NSCQ-MSX0295）
