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Application of Superimposition-Based Personal Identification Using Skull Computed Tomography Images

Authors

  • Masuko Ishii M.Sc.,

    1. Forensic Science Laboratory, Chiba Prefecture Police Headquarters, 1-71-1 Chuo-minato, Chuo-Ku, Chiba 260-0024, Japan.
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  • Kazuhiro Yayama V.M.,

    1. Forensic Science Laboratory, Kyoto Prefecture Police Headquarters, 85-3 Yabunouchi-machi, Kamaza-higashi-hairu, Shimotateuri-tori, Jyoukyou-ku, Kyouto 602-8550, Japan.
    2. Deptartment of Neurosurgery, Kansai Medical University, 10-15 Fumizono-cho, Moriguchi, Osaka 570-8507, Japan.
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  • Hisako Motani D.D.S., Ph.D.,

    1. Deptartment of Legal Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
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  • Ayaka Sakuma D.D.S.,

    1. Deptartment of Legal Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
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  • Daisuke Yasjima M.D., Ph.D.,

    1. Deptartment of Legal Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
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  • Mutumi Hayakawa M.D., Ph.D.,

    1. Deptartment of Legal Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
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  • Seiji Yamamoto M.D., Ph.D.,

    1. Deptartment of Radiology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8677, Japan.
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  • Hirotaro Iwase M.D., Ph.D.

    1. Deptartment of Legal Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
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Additional information and reprint requests:
Masuko Ishii, M.Sc.
Forensic Science Laboratory
Chiba Prefecture Police Headquarters
1-71-1 Chuo-minato, chuo-ku
Chiba 260-0024
Japan
E-mail: celeboo141@m6.gyao.ne.jp

Abstract

Abstract:  Superimposition has been applied to skulls of unidentified skeletonized corpses as a personal identification method. The current method involves layering of a skull and a facial image of a suspected person and thus requires a real skeletonized skull. In this study, we scanned skulls of skeletonized corpses by computed tomography (CT), reconstructed three-dimensional (3D) images of skulls from the CT images, and superimposed the 3D images with facial images of the corresponding persons taken in their lives. Superimposition using 3D-reconstructed skull images demonstrated, as did superimposition using real skulls, an adequate degree of morphological consistency between the 3D-reconstructed skulls and persons in the facial images. Three-dimensional skull images reconstructed from CT images can be saved as data files and the use of these images in superimposition is effective for personal identification of unidentified bodies.

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