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Sex estimation based on scapula analysis in a Japanese population using multidetector computed tomography
Suguru Torimitsu1, Yohsuke Makino1, Hisako Saitoh2
1Department of Forensic Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Department of Legal Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
Forensic Science International
|March 12, 2016
Summary
This study found that scapular measurements from 3D CT scans can accurately estimate sex in contemporary Japanese individuals. These findings are valuable for forensic anthropology and individual identification from skeletal remains.
Area of Science:
- Forensic Anthropology
- Osteology
- Medical Imaging
Background:
- Accurate sex estimation is crucial for identifying human remains.
- The scapula is a potential bone for sex estimation due to sexual dimorphism.
- 3D computed tomography (CT) offers detailed bone analysis.
Purpose of the Study:
- To evaluate sexual dimorphism in scapular measurements.
- To determine the accuracy of sex estimation using 3D CT scapular data in a Japanese sample.
- To assess the utility of scapular metrics in forensic identification.
Main Methods:
- Utilized 3D CT scans from 218 Japanese cadavers (109 male, 109 female).
- Performed ten scapular measurements on bone-extracted 3D CT images.
- Applied descriptive statistics and discriminant function analyses (DFA) for sex classification.
Main Results:
- All ten scapular measurements showed significant sexual dimorphism.
- Univariate DFA achieved sex classification accuracies ranging from 75.7% to 91.3%.
- Stepwise DFA yielded high sex prediction accuracies between 93.1% and 94.5%.
Conclusions:
- Scapular measurements derived from 3D CT images are effective for skeletal sex estimation in contemporary Japanese populations.
- This method provides a reliable tool for forensic anthropologists.
- 3D CT analysis of the scapula enhances individual identification capabilities.
