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Chinese Han skull herringbone stitch unclosed crowd anteroposterior skull suture configuration CR tablets same study finds

Author: ZhaoZuoXia
Tutor: LiuLi
School: Shanxi Medical
Course: Forensic
Keywords: Cranial suture Herringbone stitch Suture configuration Anteroposterior skull CR tablets The same identification Individual identification
CLC: D919
Type: Master's thesis
Year: 2010
Downloads: 27
Quote: 0
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Abstract

Objective: This study aimed to explore the Chinese Han herringbone stitch unclosed skull skull anteroposterior CR Tablets crowd herringbone stitch configurations of image features, establishing the same cranial suture identification technology system to meet the needs of forensic practical work. In recent years, the international community terrorist activity occurs frequently, a terrorist criminal means not only more diverse, its anti-detection capabilities are also growing trend. In international criminal investigations, some terrorists often borrow cosmetic surgery to make their faces change, thus to escape pursuit, or the destruction of their means to evade fingerprinting crest, so a practical and convenient, high power of discrimination, little influence by external damage Personal identification techniques will work in the actual security showing its unique and important value. \criminals unable to escape. But up to now this technology has not been carried out on a systematic study, to fill this gap, and improve forensic personal identification system, this study intends to use a computer X-ray photographic technique (computer radiography CR) on the Beijing Public Security Bureau forensic examination and identification centers skull samples taken, stored on a computer using the CR slice images to study cranial suture configuration, establish a configuration for use of craniosynostosis same as the new identification methods. In this study, observation of craniosynostosis identification, breaking the previous authorization form when compared to the use of pure coincidence method or image, choose a more objective and accurate measurement of indicators, quantitative analysis and comparison of individual morphological differences between the cranial sutures, with new and significance. The main purpose of this study are summarized as follows: 1, screening and eventually established the Han Chinese herringbone stitch unclosed skull skull anteroposterior CR Tablets crowd herringbone stitch configurations identified by the same observations; 2, the establishment of Chinese Han skull herringbone stitch is not CR tablets crowd closed anteroposterior skull sutures same configuration identified research methods, to meet the needs of forensic practical work, and then applied to the actual security work; 3, the initial establishment of Chinese Han herringbone stitch unclosed skull skull anteroposterior crowd CR-chip index measurements on the same identification database; 4, in the right craniosynostosis filming process, establish craniosynostosis record perfect shooting conditions and a reasonable approach for the future in airports, subways, etc. set up security equipment to provide technical reference. Methods: According to the inclusion criteria selected 100 cases of Chinese Han herringbone stitch unclosed skull skull anteroposterior crowd CR tablets, CR anteroposterior skull on each chip herringbone stitch images segmentation, classification, measurement analysis. Herringbone stitch on the description of the overall configuration of the two screening length indicator; herringbone stitch detail on the characteristics of the configuration selected four observations: the right side of the herringbone stitch is divided into three sections, each section the same as the measured indicators including a qualitative indicators and three quantitative indicators. Anteroposterior skull CR tablets using medical image processing software efilm Workstation 2.1 software for measurement data obtained using the index Microsoft Office Excel 2003 and SPSS 13.0 statistical software for statistical analysis. Measured values ??for each measure were statistically analyzed, combined with shooting time and taking into account different influencing factors such as different surveyors this identification method repeatability and stability of the measurement results after removing unsuitable for the same identification and individual identification indicators, and thus can be used to filter out individual identification observations for the same identification; calculations determined that these two time periods available indicators difference observed value of 90% reference range (for semi-quantitative indicators, calculate its Observations interquartile difference), proposed the use of herringbone stitch method of Identification: If the difference between each pair of indicators are available in their respective reference value of 90% interquartile range or within the that this two-piece skull anteroposterior same individual CR image data; if at least one of the available indicators of the difference is not in the reference value of 90% of its range, you can not determine which two anteroposterior skull belonging to the same individual CR tablets . Results: 1, herringbone stitch span difference difference dD limit: -0.0110 2.3300 × 0.1230 = 0.2756 difference Zigzag span lower limit of the difference dD: -0.0110-2.3300 × 0.1230 = -0.2976 Herringbone stitch Right Sec azimuth difference dR2HP high ceiling: -0.1000 2.3300 × 0.1000 = 0.1330 herringbone stitch the right direction, Sec difference dR2HP high point lower limit: -0.1000-2.3300 × 0.1000 = -0.3330 herringbone stitch right three sections highs The difference dR3HI from the ceiling: 0.0070 2.3300 × 0.3555 = 0.8353 herringbone stitch from the right three paragraphs difference dR3HI high point lower limit :0.0070-2 .3300 × 0.3555 = -0.8213 herringbone stitch the right direction three paragraphs high point difference dR3HP limit: 0.1200 2.3300 × 0.1001 = 0.3532 herringbone stitch right three paragraphs orientation difference dR3HP high point lower limit :0.1200-2 .3300 × 0.1001 =-0.1132dR1P the interquartile range 0dR2P the interquartile range 02, one finds the back substitution test identified 100%, finds better achieve the purpose of the experiment. Conclusions: 1, herringbone stitch span S, a herringbone stitch the right direction R1A, herringbone stitch a high point from the right R1HI, herringbone stitch the right direction for some high point R1HP, herringbone stitch the right direction, Sec R2A, herringbone stitch Right Sec high point distance R2HI, measured values ??of these indicators between different measurement personnel were not normally distributed, at different time periods between measurements also showed a non-normal distribution, they can not be two time periods for the difference between the measured value reference range calculations, it can not be selected for the present study investigated object. 2, R3P measured values, herringbone stitch the right direction R3A three sections of the measured values ??at different measurement differences between people, that this metric measurements significantly affected by subjective factors, so it removed. 3, herringbone stitch span difference D, herringbone stitch Right Sec highs orientation R2HP, herringbone stitch from the right three sections highs R3HI, herringbone stitch the right direction three sections highs R3HP, herringbone stitch the right for some type R1P , Sec herringbone stitch the right type R2P, these indicators, good stability, less susceptible to surveyors, different film time factors, and ultimately was elected to do the same identified indicators. 4, establish a set of use craniosynostosis (Zigzag) configuration for the same identification method: If the difference between each pair of indicators are available in their respective reference value of 90% interquartile range or within believes that this two-piece skull anteroposterior same individual CR image data; if at least one of the available indicators of the difference is not in the reference value of 90% of its range, you can not determine which two belong to the same skull anteroposterior CR tablets individuals. 5, the initial establishment of the skull herringbone stitch Han Chinese population is not closed skull anteroposterior CR tablets identified indicators measured in the same database;

Chinese Han skull herringbone stitch unclosed crowd anteroposterior skull suture configuration CR tablets same study finds

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