TY - JOUR
T1 - A quantitative morphological analysis of three-dimensional CT coxal bone images of contemporary Japanese using homologous models for sex and age estimation
AU - Biwasaka, Hitoshi
AU - Aoki, Yasuhiro
AU - Takahashi, Yusuke
AU - Fukuta, Mamiko
AU - Usui, Akihito
AU - Hosokai, Yoshiyuki
AU - Saito, Haruo
AU - Funayama, Masato
AU - Fujita, Sachiko
AU - Takamiya, Masataka
AU - Dewa, Koji
N1 - Funding Information:
The authors thank Mr. T. Tanijiri at Medic Engineering Co. Ltd. for his technical support in software implementation and Mr. K. Sugiyama at the Scientific Investigation Laboratory of Fukushima Prefectural Police Headquarters for his advice on statistical analysis. This work was supported by JSPS KAKENHI Grant Number JP16K09213 .
PY - 2019/2
Y1 - 2019/2
N2 - Sexual dimorphisms and age-dependent morphological features of the human coxal bone were quantitatively analyzed using homologous models created from three-dimensional (3D) computed tomography images of the pelvis (male: 514 samples, female: 388 samples, age 16–100). Bilateral average coxal images of each sex and age decade were generated separately through principle component analyses (PCA). By measuring average point-to-point distances of 8472 corresponding points (average corresponding point differences [ACPDs]) between each homologous coxal image and the average images, the sex of more than 93% of the samples was correctly assigned. Some principal components (PCs) detected in PCA of the homologous models of the samples correlated fairly well with age and are affected by features of the curvature of the iliac crest, the arcuate line and the greater sciatic notch. Moreover, separate PCA using the average images of each age decade successfully detected the first PCs, which were strongly correlated with age. However, neither multiple regression analysis using PCs related to age nor comparison of ACPDs with the average images of each age decade could produce accurate results for age decade assignment of unknown (blind) samples. Therefore, more detailed analysis of age-dependent morphological features would be necessary for actual age estimation. In addition, some laterality or left and right shape difference of the coxal bone images was also elucidated, and was more significant in females. Analysis of 3D structures using homologous models and PCA appears to be a potential technique to detect subsistent morphological changes of bones.
AB - Sexual dimorphisms and age-dependent morphological features of the human coxal bone were quantitatively analyzed using homologous models created from three-dimensional (3D) computed tomography images of the pelvis (male: 514 samples, female: 388 samples, age 16–100). Bilateral average coxal images of each sex and age decade were generated separately through principle component analyses (PCA). By measuring average point-to-point distances of 8472 corresponding points (average corresponding point differences [ACPDs]) between each homologous coxal image and the average images, the sex of more than 93% of the samples was correctly assigned. Some principal components (PCs) detected in PCA of the homologous models of the samples correlated fairly well with age and are affected by features of the curvature of the iliac crest, the arcuate line and the greater sciatic notch. Moreover, separate PCA using the average images of each age decade successfully detected the first PCs, which were strongly correlated with age. However, neither multiple regression analysis using PCs related to age nor comparison of ACPDs with the average images of each age decade could produce accurate results for age decade assignment of unknown (blind) samples. Therefore, more detailed analysis of age-dependent morphological features would be necessary for actual age estimation. In addition, some laterality or left and right shape difference of the coxal bone images was also elucidated, and was more significant in females. Analysis of 3D structures using homologous models and PCA appears to be a potential technique to detect subsistent morphological changes of bones.
KW - Age-dependent morphological change
KW - Coxal bone
KW - Forensic anthropology
KW - Homologous models
KW - Principle component analysis
KW - Sex estimation
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U2 - 10.1016/j.legalmed.2018.09.017
DO - 10.1016/j.legalmed.2018.09.017
M3 - Article
C2 - 30300811
AN - SCOPUS:85054318335
VL - 36
SP - 1
EP - 8
JO - Legal Medicine
JF - Legal Medicine
SN - 1344-6223
ER -