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| − | == Coordinate Definitions ==
| + | <big>'''Note:''' We are migrating this content to the slicer.org domain - <font color="orange">The newer page is [http://www.slicer.org/slicerWiki/index.php/Slicer3:Coordinates here]</font></big> |
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| − | This page describes the coordinate system assumptions for Slicer3
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| − | [[Image:Slicer3-coordinates.png|thumb|right|400px]]
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| − | === Volumes ===
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| − | IJK refers to voxel index coordinates.
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| − | RAS refers to Right-Anterior-Superior subject-referenced coordinates.
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| − | Each volume includes a transformation to go from voxel indices (IJK) to world (RAS). This is obtained with the vtkMRMLVolumeNode::GetRASToIJKMatrix(vtkMatrix4x4).
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| − | === Models ===
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| − | Model vertices are expressed in millimeters, in RAS space.
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| − | === Fiducials ===
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| − | Fiducial points are expressed in millimeters, in RAS space.
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| − | === Transforms ===
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| − | All transforms at RAS to RAS transforms.
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| − | == Notes ==
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| − | * image data in a volume is laid out in memory in the same order as it is read from disk. That is, the "infamous VTK Y-flip" is ''not'' applied.
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| − | * the reader for each file type is required to provide the IJKToRAS mapping.
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Revision as of 17:50, 19 May 2008
Home < Slicer3:CoordinatesNote: We are migrating this content to the slicer.org domain - The newer page is here
