Probe In Forensic Identification Using Digital X-Ray Films Of Frontal Sinus

[Study background and objective] Identification using radiographic imagematerials is one of the important study directions of forensic radiology. Thespecial morphologic characteristics of frontal sinus make it be the most usedrecognition marks in the cranial marks. Personal identification usingradiographic films of human beings is applied in forensic medicinecomprehensively, which is based on the characteristics that frontal sinus isinter-special, lifetime invariable, difficult to forge, easy to obverse and measure.From an evidentiary standpoint, however, the methods and items of personalidentification using frontal sinus should be more objectified and standardized.This study is aimed at probing in the classifications, items and the numericcodes based on the digital X-films of frontal sinus.[Methods](1) Collecting frontal sinus computer radiographic films accordingto including and excluding criterion (2)Scribing a line on the computerradiographic films tangent to the outline of upper orbit (3)Observing whetherfrontal sinus is higher or lower than the line,classifying frontal sinus according to observations (4)Choosing out 8 items from outlines of frontal sinus,describing statistically the 8 items, making 8-bit number codes from the 8 items.[Results](1) To classify frontal sinus into 6 types using the tangent linewhich goes by the upper border of the both sides of the orbit according to thefrontal sinus characteristics: from typeⅠto typeⅥ(2)The difference betweenboth sexes of frontal sinus morphologic characteristics has no statisticsignificance such as the asymmetry of frontal sinus ,the superiority of the frontalsinus sides, the number of the outline of upper border ,the occurrence of partialsepta, the location of middle septa (P＞0.05), The difference between both sexesof the ratio between frontal sinus area and the orbit area has statisticalsignificance(P＜0.05).[Conclusions](1)The types and the number codes are founded on the digitalX-films confirm that frontal sinus is inter-special and can be used to forensicidentification again.(2) Propose the 6 types based on the digital X-films offrontal sinus (3) Only the ratio between frontal sinus area and the orbit area hasdifference between sex, the other 7 items do not exit. (4) The way classifyingfirst and making number codes second is an alternative when making personalidentification using frontal sinus.