Upload
marlene-oliver
View
221
Download
0
Embed Size (px)
Citation preview
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
3DK3DK - - April 21, 2023April 21, 2023 ( (22))
Partnership for Research In Stereo Modeling
3D Knowledge and Distributed
Intelligence Project (3DK)
NSF Grant Award
# IIS-998016
http://3dk.asu.edu & http://prism.asu.edu
PRISM
3DK3DK - - April 21, 2023April 21, 2023 ( (33))
1. 3D Data Acquisition
2. Geometric Modeling
3. Feature Extraction
4. 3D Data Analysis
5. Visual Query Interface
PRISM Research Plan
3DK3DK - - April 21, 2023April 21, 2023 ( (44))
PRISM Skeletal Aging Research Overview
3DK3DK - - April 21, 2023April 21, 2023 ( (55))
Cyberware M15 Laser Digitizer
X
Y
Z
30 samples per second; typically 300µm - 1.0mm
(0.012" - 0.040")
300µm (0.012")
50-200µm (0.002-0.008")
Our scanning of pubic symphyses cast resulted in approximately 1100 vertices per cm2
3DK3DK - - April 21, 2023April 21, 2023 ( (66))
The process of transforming a point cloud into a workable 3D model
1) The 3D Point Cloud (i.e., a series of x, y, and z coordinate values)
3DK3DK - - April 21, 2023April 21, 2023 ( (77))
The process of transforming a point cloud into a workable 3D model
2) The Triangulated 3D Point Cloud
3DK3DK - - April 21, 2023April 21, 2023 ( (88))
The process of transforming a point cloud into a workable 3D model
3) The Triangulated 3D Point Cloud with Flat Surface Mesh
3DK3DK - - April 21, 2023April 21, 2023 ( (99))
The process of transforming a point cloud into a workable 3D model
4) The Final Geometrically Modeled 3D Pubic Symphysis
3DK3DK - - April 21, 2023April 21, 2023 ( (1010))
3D Modeling Summary
1.
4.3.
2.
3DK3DK - - April 21, 2023April 21, 2023 ( (1111))
3D Scanned Images of the Suchey-Brooks Female Pubic
Symphysis CastsPhase
A
B
52 431 6
3DK3DK - - April 21, 2023April 21, 2023 ( (1212))
Phase
A
B
52 431 6
3D Scanned Images of the Suchey-Brooks Male Pubic
Symphysis Casts
3DK3DK - - April 21, 2023April 21, 2023 ( (1313))
Methodology
What quantity can we use to describe shape mathematically?
CURVATURE
which measures how “curved” a surface is at any given point.
3DK3DK - - April 21, 2023April 21, 2023 ( (1414))
Curvature Calculation
2
22
21
rms
21 abs
The Principle Curvatures (k1 and k2) at a given point represent the
maximum and minimum values of the normal curvature.
Note that the principle directions are always orthogonal to one
another.
21 gaus
2
)( 21 mean
1.
4.
3.
2.
3DK3DK - - April 21, 2023April 21, 2023 ( (1515))
Surface Curvature Comparison of Male Phases 1A & 6A
Red High
Green Medium
Blue Low
Computing Surface
Curvature
3DK3DK - - April 21, 2023April 21, 2023 ( (1616))
Surface Curvature Comparison of Female Phases
Phase
A
B
52 431 6
3DK3DK - - April 21, 2023April 21, 2023 ( (1717))
Surface Curvature Comparison of Male Phases
Phase
A
B
52 431 6
3DK3DK - - April 21, 2023April 21, 2023 ( (1818))
Before and after merging similar regions on a bone by increasing the “water”
depth using the watershed algorithm.
Before
After
3DK3DK - - April 21, 2023April 21, 2023 ( (1919))
Before and after merging similar regions on a bone by increasing the “water”
depth using the watershed algorithm.
Before
After
3DK3DK - - April 21, 2023April 21, 2023 ( (2020))
Watershed Depth Threshold
3DK3DK - - April 21, 2023April 21, 2023 ( (2121))
Feature Segmentation & Data Extraction
3DK3DK - - April 21, 2023April 21, 2023 ( (2222))
Feature Segmentation & Data Extraction
3DK3DK - - April 21, 2023April 21, 2023 ( (2323))
Observed changes in mean absolute curvature values for Females
3DK3DK - - April 21, 2023April 21, 2023 ( (2424))
Female Phase 6B6A5B
3DK3DK - - April 21, 2023April 21, 2023 ( (2525))
Observed changes in mean absolute curvature values for Females
3DK3DK - - April 21, 2023April 21, 2023 ( (2626))
Observed changes in mean absolute curvature values for Males
3DK3DK - - April 21, 2023April 21, 2023 ( (2727))
Observed changes in mean absolute curvature values for Males
3DK3DK - - April 21, 2023April 21, 2023 ( (2828))
databaseGenerate XML file according to XML schema and load into database
Computer interface allows researcher to analyze the scanned raw data
Visual query interface enables search results to be exported
as XML file
XSL/HTML display
Visual query search results Interface allows researcher to analyze the associated data
Prototype Development of Visual Query Interface
3DK3DK - - April 21, 2023April 21, 2023 ( (2929))
Future Research Goals
1. Increase the sample size of 3D modeled pubic symphyses especially those with known vital statistics to facilitate further aging research
2. Continue examining the ability to segment and extract data from specific surface features on the pubic symphysis using curvature
3. Development of a Visual Query Interface to allow students and researchers to interact with 3D modeled data sets
3DK3DK - - April 21, 2023April 21, 2023 ( (3030))
Acknowledgements
http://3dk.asu.edu & http://prism.asu.edu
PRISM
1. NSF Grant Award # IIS-998016 2. Diane Hawkey, Dept. of Anthropology, ASU3. 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.
4. The staff of 3dcompress.com