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Matthew W. Tocheri, Anshuman Razdan, Tosha L. Dupras, Myungsoo Bae, and Dezhi Liu

Quantitative Analyses of Human Pubic Symphyseal Morphology Using Three Dimensional Data: The Potential Utility for Aging Adult Human Skeletons. Matthew W. Tocheri, Anshuman Razdan, Tosha L. Dupras, Myungsoo Bae, and Dezhi Liu. PRISM. http://3dk.asu.edu & http://prism.asu.edu.

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Matthew W. Tocheri, Anshuman Razdan, Tosha L. Dupras, Myungsoo Bae, and Dezhi Liu

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  1. Quantitative Analyses of Human Pubic Symphyseal Morphology Using Three Dimensional Data: The Potential Utility for Aging Adult Human Skeletons Matthew W. Tocheri, Anshuman Razdan, Tosha L. Dupras, Myungsoo Bae, and Dezhi Liu

  2. PRISM http://3dk.asu.edu & http://prism.asu.edu Partnership for Research In Stereo Modeling 3D Knowledge and Distributed Intelligence Project (3DK) NSF Grant Award # IIS-998016 3DK - October 14, 2014 (2)

  3. PRISM Research Plan • 3D Data Acquisition • Geometric Modeling • Feature Extraction • 3D Data Analysis • Visual Query Interface 3DK - October 14, 2014 (3)

  4. PRISM Skeletal Aging Research Overview 3DK - October 14, 2014 (4)

  5. Cyberware M15 Laser Digitizer 300µm (0.012") Y 50-200µm (0.002-0.008") Z X 30 samples per second; typically 300µm - 1.0mm (0.012" - 0.040") Our scanning of pubic symphyses cast resulted in approximately 1100 vertices per cm2 3DK - October 14, 2014 (5)

  6. 1) The 3D Point Cloud (i.e., a series of x, y, and z coordinate values) The process of transforming a point cloud into a workable 3D model 3DK - October 14, 2014 (6)

  7. 2) The Triangulated 3D Point Cloud The process of transforming a point cloud into a workable 3D model 3DK - October 14, 2014 (7)

  8. 3) The Triangulated 3D Point Cloud with Flat Surface Mesh The process of transforming a point cloud into a workable 3D model 3DK - October 14, 2014 (8)

  9. 4) The Final Geometrically Modeled 3D Pubic Symphysis The process of transforming a point cloud into a workable 3D model 3DK - October 14, 2014 (9)

  10. 3D Modeling Summary 1. 2. 3. 4. 3DK - October 14, 2014 (10)

  11. 3D Scanned Images of the Suchey-Brooks Female Pubic Symphysis Casts Phase 1 2 3 4 5 6 A B 3DK - October 14, 2014 (11)

  12. 3D Scanned Images of the Suchey-Brooks Male Pubic Symphysis Casts Phase 1 2 3 4 5 6 A B 3DK - October 14, 2014 (12)

  13. Methodology What quantity can we use to describe shape mathematically? • CURVATURE • which measures how “curved” a surface is at any given point. 3DK - October 14, 2014 (13)

  14. Curvature Calculation 1. 2. The Principle Curvatures (k1 and k2) at a given point represent the maximumandminimum values of the normal curvature. Note that the principle directions are always orthogonal to one another. 3. 4. 3DK - October 14, 2014 (14)

  15. Surface Curvature Comparison of Male Phases 1A & 6A Computing Surface Curvature Red  High Green  Medium Blue  Low 3DK - October 14, 2014 (15)

  16. Surface Curvature Comparison of Female Phases Phase 1 2 3 4 5 6 A B 3DK - October 14, 2014 (16)

  17. Surface Curvature Comparison of Male Phases Phase 1 2 3 4 5 6 A B 3DK - October 14, 2014 (17)

  18. Before and after merging similar regions on a bone by increasing the “water” depth using the watershed algorithm. Before After 3DK - October 14, 2014 (18)

  19. Before and after merging similar regions on a bone by increasing the “water” depth using the watershed algorithm. Before After 3DK - October 14, 2014 (19)

  20. Watershed Depth Threshold 3DK - October 14, 2014 (20)

  21. Feature Segmentation & Data Extraction 3DK - October 14, 2014 (21)

  22. Feature Segmentation & Data Extraction 3DK - October 14, 2014 (22)

  23. Observed changes in mean absolute curvature values for Females 3DK - October 14, 2014 (23)

  24. Female Phase 6B 6A 5B 3DK - October 14, 2014 (24)

  25. Observed changes in mean absolute curvature values for Females 3DK - October 14, 2014 (25)

  26. Observed changes in mean absolute curvature values for Males 3DK - October 14, 2014 (26)

  27. Observed changes in mean absolute curvature values for Males 3DK - October 14, 2014 (27)

  28. Prototype Development of Visual Query Interface Generate XML file according to XML schema and load into database database Visual query interface enables search results to be exported as XML file Computer interface allows researcher to analyze the scanned raw data XSL/HTML display Interface allows researcher to analyze the associated data Visual query search results 3DK - October 14, 2014 (28)

  29. Future Research Goals • Increase the sample size of 3D modeled pubic symphyses especially those with known vital statistics to facilitate further aging research • Continue examining the ability to segment and extract data from specific surface features on the pubic symphysis using curvature • Development of a Visual Query Interface to allow students and researchers to interact with 3D modeled data sets 3DK - October 14, 2014 (29)

  30. Acknowledgements NSF Grant Award # IIS-998016 Diane Hawkey, Dept. of Anthropology, ASU The PRISM team: M. Zhu, T. Esquerra, G. Farin, G. Nielson, D. Collins, M. Marzke, A. Simon, J. Rowe, S. Pulla, C. Bezwada, P. Agarwal, U. Schurmanns, G. Jones, P. Mongkolman, P. McCartney, K. Johns, P. Baluch, D. Van Alfen, J. Riel-Salvatore, S. Van Note and many others. The staff of 3dcompress.com PRISM http://3dk.asu.edu & http://prism.asu.edu 3DK - October 14, 2014 (30)

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