家兔4种死因死后心脏CT影像时序性变化  

Time-related Changes in Cardiac CT Images of Rabbits Died from Four Kinds of Execution

作　　者：商庆发 郑吉龙[1] 章彪 张巍[1] 霍德民 贾儒林 单迪 SHANG Qingfa;ZHENG Jilong;ZHANG Biao;ZHANG Wei;HUO Demin;JIA Rulin;SHAN Di(Department of Forensic Medicine,Criminal Investigation Police University of China,Shenyang 110035,China;Institute of Forensic Science of Shanghai Public Security Bureau,Shanghai 200083,China;Criminal Investigation Division of Shanghai Jiading Public Security Sub-Bureau,Shanghai 201822,China)

机构地区：[1]中国刑事警察学院法医学系法医病理教研室,沈阳110035 [2]上海市公安局物证鉴定中心,上海200083 [3]上海市公安局嘉定分局刑侦支队,上海201822

出　　处：《刑事技术》2021年第3期252-256,共5页Forensic Science and Technology

基　　金：公安部技术研究计划(2016JSYJC56);研究生创新能力提升项目(2019YCYB47)。

摘　　要：目的动态监测兔4种死因死后心脏CT影像随死亡时间(postmortem interval,PMI)的变化,探讨利用CT影像学推断死亡时间的可行性及合适参照物。方法利用家兔制备空气栓塞、缢死、溺死、失血性休克4种死亡模型,家兔死后120h内每隔6h检测心脏的CT影像和平均CT值的变化情况,建立不同死因家兔心脏平均CT值与死后不同经过时间的回归方程。结果家兔4种死因死后心脏组织的CT影像随PMI的延长呈规律性改变,与心脏大体形态变化结果基本一致;分别建立了4种死因心脏的平均CT值与PMI关系的二项式回归方程,均具有统计学意义(P<0.05)。结论实验中建立的利用死后心脏CT影像分析死后经过时间的方法以及相关回归方程为法医学死亡时间的推断提供了新的、客观的、可视化的量化方法及参考依据。Objective To explore the feasibility and appropriate parameters for estimating postmortem interval(PMI)through time-related CT imaging into dynamically monitoring the cardiac changes of rabbits died from four kinds of execution.Methods The experimental rabbits were executed with four disposals of air embolism,strangulation,drowning and hemorrhagic shock.The dead rabbits were observed of their hearts with CT scanning every 6 hours within 120h from the death moment,having the obtained time-different CT images and mean CT values examined.With the cardiac average CT values of rabbits died from discrepant execution,four relevant regression equations were established against the elapsing time(i.e.PMI).Results The CT images of post-death cardiac tissue of rabbits died from one of four executions did change regularly with the PMI elongating,showing consistent with the autopsy verification.The binomial regressive equations were established between the post-death cardiac average CT value and PMI from four executions,demonstrating statistically significant(P<0.05).Conclusion The postmortem cardiac CT imaging into PMI analysis,plus the relating regression equation,provides a new objective visual quantitative approach and reference for forensic medicine to infer the time of death.

关 键 词：法医病理学 心脏CT影像 死后经过时间 空气栓塞 缢死 溺死 失血性休克 

分 类 号：DF795.1[医药卫生—法医学]