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25 3 31 23903 C 2010 2012 22590640 CT 3 Three dimensional analysis of pubic bone and pelvic auricular surfaces using reconstructed CT images. AOKI YASUHIRO 90202481 3 3 CT 30 35 Three dimensional pubic bone images, synthesized with 3D scanner and reconstructed from multi-slice CT images, were analyzed to quantify any age-dependent morphological changes of the symphyseal faces. Average values of absolute mean curvatures of pubic symphyseal surfaces under 30 years old were higher than those of older individuals, of which the values were approximately constant. The ratio of the concave areas increased gradually with progressing age classes. In the prinsipal component analysis performed on the homology models of the pubic symphyseal faces, some components specific to each age class were detected. Furthermore, among the specimens of under 35 years old, a few age-correlated components were also identified. ) 2010 700,000 210,000 910,000 2011 400,000 120,000 520,000 2012 400,000 120,000 520,000 2013 2014 1,500,000 450,000 1,950,000 CT 1. 1 2 CT CT 3

3 3 3 2 2 3 3 3 3 2. 3 3 CT 3 3 2 3. 1 145 90 55 11 88 CT 226 10 80 124 102 2 PICZA LPX- 600 Roland 3 CT Aquilion-advance Aquilion 64 1mm INTAGE Realia KGT 3 Suchey-Brooks S-B CT 3 3 STL 3 3D Rugle6 5mm 2 HBM- Rugle 3 Homologous Body Modeling Human Body Statistics Principal Component Analysis HBS-PCA S-B 3 CT 3 CT 4. 1 3 4 phase 141 89 52 3 1 2

隆線や第 5 相以降で顕著化する陥凹を観察でき たが 小孔やリッピングなど微細な構造は一部 把握できなかった 図 1 画像を用いた S-B 分 類の相判定の結果は実物標本によるそれとほぼ 一致し 画像解析を行うに十分な再現性が確保 されていると考えられた 傾向が 特に女性の右恥骨で顕著に認められた 図 3. 平均曲率の S-B 分類相間の変動 右恥 骨結合面 図 1. 左 恥骨標本 右 スキャナによる 3D 再構成像 S-B 分類第 2 相 また全般に女性において男性より大きな値を示 した 一方 凹領域 凸領域の比は 男女とも相 ないし年齢と正相関する傾向が認められた 図 4, 5 2 CT 画像からの恥骨結合部 3 次元再構成 描 出 し た 恥 骨 結 合 面 像 に つ き CT 値 Hounsfield number を調整することなどによ り 平行隆線などによる結合面の凹凸および輪 郭はある程度描出でき 相の推定が可能な例も あった 一方 特に第 5 相以降では靭帯の骨化 の影響などにより 結合部の骨表面像の描出に 困難を伴う例が相当数あった 図 2 図 4. 恥骨結合面の等高線表示 左 および 曲率分布 中 凹部 右 凸部 上 S-B 分類第 1 相 下 同第 4 相 図 2. CT 画像から再構成した恥骨結合面の 3 次元像 ローマ数字は S-B 分類相を示す 3 恥骨結合面の曲率解析 男女とも恥骨結合面の平均曲率 絶対値 は S-B 分類の第 1 相 2 相においては大きく 3 相 以降は低下し 平準化した 図 3 年齢との関 係においても 10 歳代 30 歳代にかけ低下する 図 5. 恥骨結合面の凹凸部の面積比と年齢と の関係

40 4 3 CT 4 3 1500 3000 1500 1 5 3 ±0.3mm 6. S-B 1 n = 5 0 1-154.4 5 2 10 0 6 6 S-B 90 52 26 24 1 35 n=11, R 2 =0.69 7 7. 35 2 n=11, contribution ratio:20.1 7 3 CT 3 CT 3 3 CT

5. 3 Biwasaka H, Sato K, Aoki Y, Kato H, Maeno M, Tanijiri T, Fujita S, Dewa K. Three dimensional surface analyses of pubic symphyseal faces of contemporary Japanese reconstructed with 3D digitized scanner. Legal Med2013; 15: Corrected proof available online. DOI: 10.1016/j.legalmed.2013.02.003 Biwasaka H, Aoki Y, Sato K, Tanijiri T, Fujita S, Dewa K, Yoshioka K, Tomabechi M. Analyses of sexual dimorphism of reconstructed pelvic computed tomography images of contemporary Japanese using curvature of the greater sciatic notch,pubic arch and greater pelvis. Forensic Sci Int 2012; 219: 288.e1 288.e8. DOI; 10.1016/j.forsciint.2011.11.032 Biwasaka H, Tokuta T, Sasaki Y, Takagi T, Tanijiri T, Miyasaka S, Takamiya M, Aoki Y. Application of computerized correction method for optical distortion of 2-dimensional facial image in superimposition between 3-dimensional and 2- dimensional facial images. Forensic Sci Int2010; 197: 97-104. DOI: 10.1016/j.forsciint.2009.12.063 CT 3 95 2011 6 16 6. 1 AOKI YASUHIRO 90202481 2 BIWASAKA HITOSHI 90405837 2 3 96 2012 6 9