中国司法鉴定Issue(2)：46-52,7.DOI:10.3969/j.issn.1671-2072.2026.02.006
基于2.5D技术的深度学习模型用于肋骨骨折形成时间段分类的研究
Classification of Rib Fracture Formation Time Using Deep Learning Models Based on 2.5D Technology
摘要
Abstract
Objective Based on 2.5D deep learning technology,chest computed tomography(CT)images are used to assist forensic estimation of the time interval of rib fracture injury formation.Methods A total of 331 patients with rib fractures accepted by the Academy of Forensic Science between 2017 and 2024 were enrolled,and 1 290 CT images of rib fractures obtained from the day of injury to 90 days post-injury were included in the dataset.Among them,464 fractures had an injury formation time≤21 days and 826 had an injury formation time>21−90 days.The dataset was divided into training,validation,and test sets at an approximately ratio of 7∶2∶1.After ex-tracting rib fracture regions of interest(ROI)using a segmentation model,the slice with the largest area was taken as the center.Two adjacent slices anterior and posterior to this reference were selected to form a five-slice stack.These slices were merged into a five-channel ResNet-101 deep learning model.The model's performance on the classification task of rib fracture injury formation time interval was evaluated using indicators including area under the curve,accuracy.Results In the test set,the model achieved an area under the curve of 0.88,an accuracy of 81.54%.Conclusion The deep learning model based on 2.5D technology demonstrates good application potential in determining the time of rib fracture injury formation,effectively integrating multi-slice feature information,and can provide an objective and quantitative method for forensic clinical appraisal.关键词
法医临床学/肋骨骨折/损伤形成时间/深度学习/CTKey words
forensic clinical medicine/rib fracture/injury formation time/deep learning/CT分类
社会科学引用本文复制引用
孙亚宁,俞晓英,盛延良,万雷,夏文涛..基于2.5D技术的深度学习模型用于肋骨骨折形成时间段分类的研究[J].中国司法鉴定,2026,(2):46-52,7.基金项目
国家重点研发计划资助项目(2022YFC3302001) （2022YFC3302001）
上海市司法鉴定协会资助项目(SHSFJD2023-004) （SHSFJD2023-004）
上海市法医学重点实验室资助项目(21DZ2270800) （21DZ2270800）
上海市司法鉴定专业技术服务平台资助项目 （）
司法部司法鉴定重点实验室资助项目. （）
