基于口腔全景曲面体层摄影新编码方法的法医学个体识别  

Forensic Individual Identification Based on the New Coding Method of Oral Panoramic Tomography

作　　者：刘猛 范飞[1] 孙澈 裘诗文 刘媛媛[3] 郭晓莉 邓振华[1] LIU Meng;FAN Fei;SUN Che;QIU Shi-wen;LIU Yuan-yuan;GUO Xiao-li;DENG Zhen-hua(West China School of Basic Medical Sciences&Forensic Medicine,Sichuan University,Chengdu 610041,China;College of Computer Science,Sichuan University,Chengdu 610041,China;Department of Oral Radiology,West China Hospital of Stomatology,Sichuan University,Chengdu 610041,China)

机构地区：[1]四川大学华西基础医学与法医学院,四川成都610041 [2]四川大学计算机学院,四川成都610041 [3]四川大学华西口腔医院放射科,四川成都610041

出　　处：《法医学杂志》2020年第6期767-771,共5页Journal of Forensic Medicine

基　　金：国家重点研发计划资助项目(2018YFC0807303);大学生创新创业训练计划资助项目(202010610116)。

摘　　要：目的探讨基于口腔全景曲面体层摄影进行个体识别的新编码方法,分析非同源影像片不同编码模块的多样性、同源影像片不同编码模块的一致率及编码指标匹配率,评估不同模块及该编码方法在个体识别中的应用价值。方法回顾性收集1000例已完成恒乳牙交替的患者的口腔全景曲面体层摄影片,每例均包含两张不同时间拍摄的影像片(根据时间先后分为早期库和后期库),按照设计的编码方法逐一进行编码,设计计算机程序比对,并计算不同编码模块的多样性和一致率以及编码指标匹配率。结果反映牙齿特征的4个模块的多样性远高于同库的其他模块,且两库样本多样性最高的均为右下颌牙齿,且此4个模块的编码一致率均在50%以上。90.2%的同源影像片指标匹配率超过80%。结论反映牙齿特征的4个模块在个体识别中的应用价值较高,其中右下颌牙齿最高,本研究的编码方法具有一定的法医学个体识别价值。Objective To discuss a new coding method for individual identification based on oral panoramic tomography,analyze the diversity of different coding modules in nonhomologous images and the consistency and the matching rate of the coding indexes of different coding modules in homologous images,and evaluate the application value of the different modules and the new coding method in individual identification.Methods The oral panoramic tomography images of 1000 patients with permanent teeth were collected retrospectively.Each patient had two images taken at different times(called the Early database and the Late database according to the chronological order).Each image was coded according to the designed coding method.A computer program was designed to compare the diversity of different modules,and calculate the diversity and consistency of different coding modules as well as the matching rate of the coding indexes.Results The diversity of the 4 modules that reflected teeth characteristics was much higher than that of other modules in the same database.The highest diversity was noticed in the module of right mandibular teeth in samples of both databases.The coding consistencies of the 4 modules were all above 50%.Besides,90.2%of the matching rates of indexes of homologous images were over 80%.Conclusion The 4 modules have higher application value in individual identification,especially the right mandibular teeth.The coding method has a certain value in forensic individual identification.

关 键 词：法医人类学 法医齿科学 口腔全景曲面体层摄影 多样性 个体识别 

分 类 号：DF795.6[医药卫生—法医学]