Difference between revisions of "Projects:RegistrationLibrary:RegLib C15"
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===Registration Challenges=== | ===Registration Challenges=== | ||
| − | * | + | *A dedicated module for AC-PC alignment is used. |
| + | *the only difficulty lies with accurate placement of the AC-PC fiducials. Depending on image resolution and contrast these can be difficult to find. | ||
| + | *midline fiducials should be easily obtainable from axial and coronal views. 3 midline fiducials suffice; more is recommended for a more robust solution. | ||
===Key Strategies=== | ===Key Strategies=== | ||
| − | * | + | * this is a special case of fiducial-based alignment. Instead of aligning two sets of fiducial pairs, only one set of fiducials is aligned with a predefined orientation: The plane defined by the midline fiducials is aligned to be vertical in coronal/axial views, and the line defined by the AC-PC line is rotated to be horizontal in a sagittal view. |
=== Registration Results=== | === Registration Results=== | ||
Revision as of 13:20, 12 April 2010
Home < Projects:RegistrationLibrary:RegLib C15Back to ARRA main page
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Contents
Slicer Registration Librar Case 15: Brain MR Alignment along AC-PC line
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LEGEND
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 Fiducials
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 T1 SPGR
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| 2 points marking AC-PC line 3+ points marking midline |
1 mm isotropic 256 x 256 x 116 RAS |
Objective / Background
Keywords
MRI, brain, head, anterior commissure, posterior commissure, AC-PC Line, Talairach, fiducial alignment
Input Data
moving: T1 MPRAGE 1x1x1 mm voxel size
Registration Challenges
- A dedicated module for AC-PC alignment is used.
- the only difficulty lies with accurate placement of the AC-PC fiducials. Depending on image resolution and contrast these can be difficult to find.
- midline fiducials should be easily obtainable from axial and coronal views. 3 midline fiducials suffice; more is recommended for a more robust solution.
Key Strategies
- this is a special case of fiducial-based alignment. Instead of aligning two sets of fiducial pairs, only one set of fiducials is aligned with a predefined orientation: The plane defined by the midline fiducials is aligned to be vertical in coronal/axial views, and the line defined by the AC-PC line is rotated to be horizontal in a sagittal view.
Registration Results
Download
- Registration Library Case 15: Brain alignment along AC-PC Line (full tutorial set) (Tutorial+Data,Presets, Solution, zip file 25.4 MB)
- Registration Library Case 15: Brain alignment along AC-PC Line (data only) (Data,Presets, Solution, zip file 20 MB)
- Registration Library Case 15: step-by step tutorial (PowerPoint file 3.2 MB)
Link to User Guide: How to Load/Save Registration Parameter Presets
