https://www.slicer.org/w/index.php?action=history&feed=atom&title=Slicer3%3ACoordinates 2026-04-18T20:17:50Z Revision history for this page on the wiki MediaWiki 1.33.0 https://www.slicer.org/w/index.php?title=Slicer3:Coordinates&diff=3813&oldid=prev 2008-05-15T17:59:24Z

<p>1 revision</p> <table class="diff diff-contentalign-left" data-mw="interface"> <tr class="diff-title" lang="en"> <td colspan="1" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td> <td colspan="1" style="background-color: #fff; color: #222; text-align: center;">Revision as of 17:59, 15 May 2008</td> </tr><tr><td colspan="2" class="diff-notice" lang="en"><div class="mw-diff-empty">(No difference)</div> </td></tr></table>

Marianna https://www.slicer.org/w/index.php?title=Slicer3:Coordinates&diff=3812&oldid=prev 2007-07-20T17:48:03Z

<p><span dir="auto"><span class="autocomment">Notes</span></span></p> <p><b>New page</b></p><div>== Coordinate Definitions ==<br /> <br /> This page describes the coordinate system assumptions for Slicer3<br /> <br /> [[Image:Slicer3-coordinates.png|thumb|right|400px]]<br /> <br /> === Volumes ===<br /> <br /> IJK refers to voxel index coordinates.<br /> <br /> RAS refers to Right-Anterior-Superior subject-referenced coordinates.<br /> <br /> Each volume includes a transformation to go from voxel indices (IJK) to world (RAS). This is obtained with the vtkMRMLVolumeNode::GetRASToIJKMatrix(vtkMatrix4x4).<br /> <br /> === Models ===<br /> <br /> Model vertices are expressed in millimeters, in RAS space.<br /> <br /> === Fiducials === <br /> <br /> Fiducial points are expressed in millimeters, in RAS space.<br /> <br /> === Transforms ===<br /> <br /> All transforms at RAS to RAS transforms.<br /> <br /> == Notes ==<br /> <br /> * image data in a volume is laid out in memory in the same order as it is read from disk. That is, the &quot;infamous VTK Y-flip&quot; is ''not'' applied.<br /> * the reader for each file type is required to provide the IJKToRAS mapping.</div>

Pieper