TY - JOUR
T1 - Sex determination based on a thoracic vertebra and ribs evaluation using clinical chest radiography
AU - Tsubaki, Shun
AU - Morishita, Junji
AU - Usumoto, Yosuke
AU - Sakaguchi, Kyoko
AU - Matsunobu, Yusuke
AU - Kawazoe, Yusuke
AU - Okumura, Miki
AU - Ikeda, Noriaki
N1 - Funding Information:
The authors thank Dr Yasuo Sasaki (Department of Radiology, Iwate Prefectural Central Hospital) for providing all chest images. We also thank faculty members of Department of Forensic Pathology and Sciences, Graduate School of Medical Sciences, Kyushu University, Japan and Masayuki Sasaki M.D, Ph.D. for their valuable discussions.
Publisher Copyright:
© 2017 Elsevier B.V.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2017/7
Y1 - 2017/7
N2 - Our aim was to investigate whether sex can be determined from a combination of geometric features obtained from the 10th thoracic vertebra, 6th rib, and 7th rib. Six hundred chest radiographs (300 males and 300 females) were randomly selected to include patients of six age groups (20s, 30s, 40s, 50s, 60s, and 70s). Each group included 100 images (50 males and 50 females). A total of 14 features, including 7 lengths, 5 indices for the vertebra, and 2 types of widths for ribs, were utilized and analyzed for sex determination. Dominant features contributing to sex determination were selected by stepwise discriminant analysis after checking the variance inflation factors for multicollinearity. The accuracy of sex determination using a combination of the vertebra and ribs was evaluated from the selected features by the stepwise discriminant analysis. The accuracies in each age group were also evaluated in this study. The accuracy of sex determination based on a combination of features of the vertebra and ribs was 88.8% (533/600). This performance was superior to that of the vertebra or ribs only. Moreover, sex determination of subjects in their 20s demonstrated the highest accuracy (96.0%, 96/100). The features selected in the stepwise discriminant analysis included some features in both the vertebra and ribs. These results indicate the usefulness of combined information obtained from the vertebra and ribs for sex determination. We conclude that a combination of geometric characteristics obtained from the vertebra and ribs could be useful for determining sex.
AB - Our aim was to investigate whether sex can be determined from a combination of geometric features obtained from the 10th thoracic vertebra, 6th rib, and 7th rib. Six hundred chest radiographs (300 males and 300 females) were randomly selected to include patients of six age groups (20s, 30s, 40s, 50s, 60s, and 70s). Each group included 100 images (50 males and 50 females). A total of 14 features, including 7 lengths, 5 indices for the vertebra, and 2 types of widths for ribs, were utilized and analyzed for sex determination. Dominant features contributing to sex determination were selected by stepwise discriminant analysis after checking the variance inflation factors for multicollinearity. The accuracy of sex determination using a combination of the vertebra and ribs was evaluated from the selected features by the stepwise discriminant analysis. The accuracies in each age group were also evaluated in this study. The accuracy of sex determination based on a combination of features of the vertebra and ribs was 88.8% (533/600). This performance was superior to that of the vertebra or ribs only. Moreover, sex determination of subjects in their 20s demonstrated the highest accuracy (96.0%, 96/100). The features selected in the stepwise discriminant analysis included some features in both the vertebra and ribs. These results indicate the usefulness of combined information obtained from the vertebra and ribs for sex determination. We conclude that a combination of geometric characteristics obtained from the vertebra and ribs could be useful for determining sex.
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U2 - 10.1016/j.legalmed.2017.06.003
DO - 10.1016/j.legalmed.2017.06.003
M3 - Article
C2 - 28668479
AN - SCOPUS:85021428813
SN - 1344-6223
VL - 27
SP - 19
EP - 24
JO - Legal Medicine
JF - Legal Medicine
ER -