Difference between revisions of "2014 Summer Project Week:Slicer Murin Shape Analysis"
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<li> Modalities: <b> Optical Projection Tomography</b> [[File:Sample OPT Mouse embryo.zip]] <br> | <li> Modalities: <b> Optical Projection Tomography</b> [[File:Sample OPT Mouse embryo.zip]] <br> | ||
<B> Micro Computed Tomography </b> [[File:Stained registered sample mCT.zip]] <br> | <B> Micro Computed Tomography </b> [[File:Stained registered sample mCT.zip]] <br> | ||
| − | [[Image:OPT Crossection.PNG|100px]] | + | [[Image:OPT Crossection.PNG|100px]] [[Image:Registered mCT scans.png|100px]] |
<li> Shape Analysis | <li> Shape Analysis | ||
<ul> | <ul> | ||
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<li> Goals for Project Week: | <li> Goals for Project Week: | ||
<ul> | <ul> | ||
| − | <li>Meet the community and learn | + | <li> Meet the community and learn from them! |
| − | <li>Implement the landmark based Procrustes Analysis in Slicer | + | <li> Raise awareness about issues in using Slicer in high-resolution small animal imaging. |
| + | <li> Implement the landmark based Procrustes Analysis in Slicer | ||
</ul> | </ul> | ||
| Line 43: | Line 44: | ||
<ul> | <ul> | ||
<li>Implement GPA/PCA shape analysis in python</li> | <li>Implement GPA/PCA shape analysis in python</li> | ||
| − | <li> | + | <li>Provide an interactive tool to visualize the decomposition along the principle components of shape variation using thin plate splines.<br> |
| + | [[Image:TPS.png|400px]])</li> | ||
| − | <li> <b>Ability to create semi-landmarks to increase | + | <li> <b>Ability to create semi-landmarks to increase coverage in regions where anatomial landmarks are sparse. </b> |
<ul> | <ul> | ||
<li><b>User will a uniformly sampled point cloud by entering the number of semi-landmarks. Existing “hard” landmarks will be used for their distribution. This will serve as the template to be transferred to all remaining volumes (atlas) | <li><b>User will a uniformly sampled point cloud by entering the number of semi-landmarks. Existing “hard” landmarks will be used for their distribution. This will serve as the template to be transferred to all remaining volumes (atlas) | ||
<li>The template will be transferred to a new surface. Existing “hard” landmarks will allow for correspondence. The transferred points will then be moved along the surface of the volume by optimizing the bending energy function. | <li>The template will be transferred to a new surface. Existing “hard” landmarks will allow for correspondence. The transferred points will then be moved along the surface of the volume by optimizing the bending energy function. | ||
<li>The coordinates of the slid landmarks will be saved into a new fiducial list, from which the GPA analysis can be conducted.</b> | <li>The coordinates of the slid landmarks will be saved into a new fiducial list, from which the GPA analysis can be conducted.</b> | ||
| + | <li>These should be accomplished on volume, not surface meshes derived from scans. | ||
</ul> | </ul> | ||
</ul> | </ul> | ||
| Line 56: | Line 59: | ||
<h3>Progress</h3> | <h3>Progress</h3> | ||
<ul> | <ul> | ||
| − | <li> Generalized Procrustes Alignment</li> | + | <li> Generalized Procrustes Alignment (implemented)</li> |
| − | <li> Principal Component and Singular Value Decomposition of the Procrustes aligned coordinates</li> | + | <li> Principal Component and Singular Value Decomposition of the Procrustes aligned coordinates (implemented)</li> |
| − | <li> Thin Plate Spline visualization of the shape variables from PCA and/or SVD ( | + | <li> Thin Plate Spline visualization of the shape variables from PCA and/or SVD (implemented).</li> |
| + | <li> Transfering and sliding a template of semi-landmarks to the target volume (in progress) | ||
</ul> | </ul> | ||
Latest revision as of 15:46, 24 June 2014
Home < 2014 Summer Project Week:Slicer Murin Shape AnalysisKey Investigators
- Murat Maga (Seattle Children's Research Institute & University of Washington Dept. of Pediatrics)
- Ryan Young (Seattle Children's Research Institute)
Project Description
- Face is the major diagnostic feature to identify
- Brain and the CNS are affected primarily.
- What's the earliest time we begin to detect changes in the face?
- How does the brain volumes (and gross morphology) relate to changes in the face?
Micro Computed Tomography File:Stained registered sample mCT.zip
- We use landmarks to identify the anatomical regions across our developmental series of fetal samples.
- We want to be able segment brains from about 600 volumes and do a coupled analysis of facial and brain phenotypes.
- Meet the community and learn from them!
- Raise awareness about issues in using Slicer in high-resolution small animal imaging.
- Implement the landmark based Procrustes Analysis in Slicer
Objective
- Create a GPA/PCA shape analysis and visualization module for Slicer.
Approach, Plan
- Implement GPA/PCA shape analysis in python
- Provide an interactive tool to visualize the decomposition along the principle components of shape variation using thin plate splines.
) - Ability to create semi-landmarks to increase coverage in regions where anatomial landmarks are sparse.
- User will a uniformly sampled point cloud by entering the number of semi-landmarks. Existing “hard” landmarks will be used for their distribution. This will serve as the template to be transferred to all remaining volumes (atlas)
- The template will be transferred to a new surface. Existing “hard” landmarks will allow for correspondence. The transferred points will then be moved along the surface of the volume by optimizing the bending energy function.
- The coordinates of the slid landmarks will be saved into a new fiducial list, from which the GPA analysis can be conducted.
- These should be accomplished on volume, not surface meshes derived from scans.
Progress
- Generalized Procrustes Alignment (implemented)
- Principal Component and Singular Value Decomposition of the Procrustes aligned coordinates (implemented)
- Thin Plate Spline visualization of the shape variables from PCA and/or SVD (implemented).
- Transfering and sliding a template of semi-landmarks to the target volume (in progress)
