Forensic age estimation based on the pigmentation in the costal cartilage from human mortal remains
| Autor: | Ziqin Zhao, Xin Chen, Bi Xiao, Hang Meng, Yiwen Shen, Jianhui Xie, Jian-Jun Yan, Mingchang Zhang, Kaijun Ma |
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| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Adolescent Second costal cartilage Biology Pathology and Forensic Medicine Pigment accumulation Linear regression Image Processing Computer-Assisted medicine Humans Child Aged Aged 80 and over Orthodontics Training set Pigmentation Age Factors Forensic anthropology Middle Aged Costal cartilage Costal Cartilage Forensic science Issues ethics and legal aspects medicine.anatomical_structure Age estimation Forensic Anthropology Female Autopsy |
| Zdroj: | Legal Medicine. 40:32-36 |
| ISSN: | 1344-6223 |
| DOI: | 10.1016/j.legalmed.2019.07.004 |
| Popis: | Age estimation is considered a crucial and challenging issue in forensic casework. Costal cartilage appears a potential mortal remain in age-at-death estimation attributable to its correlative alteration in color based on pigment accumulation with the advancing age. In this study, samples from the second costal cartilage were collected in a Chinese Han population, and the cross sections were subsequently scanned and digitalized in a standard way. Color change was quantified using mean gray value (MGV), which was measured by Photoshop CS5. After the exclusion of samples with factors which could impair the quality of images and the accuracy of values, a high correlation was demonstrated between age and MGV in samples. A linear regression model (AGE = 173.425–0.755*aveMGV) was established for age prediction, with its performance evaluated using both samples from the training set and the blind test set, in which a mean absolute deviation of 4.42 years and 3.57 years was obtained, respectively. Altogether, MGV could be reckoned as a precise quantification of pigmentation in costal cartilage and an excellent indicator of age prediction in the age interval from 20 to 60 years. Moreover, our strategy appears more user-friendly and accurate, thus exceedingly practical for age estimation in forensic anthropology. |
| Databáze: | OpenAIRE |
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