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The position of RT Dose grid is usually stored as relative to the referenced image in Grid Frame Offset Vector. Do you know if GDCM corrected for that?<br><br>Xiaofeng Zhao<br>
<a href="http://www.xzing.org" target="_blank"></a><br><br><br><br><hr id="stopSpelling">Date: Wed, 23 Feb 2011 17:38:14 +0000<br>From: jothybasu@gmail.com<br>To: gdcm-developers@lists.sourceforge.net; vtkusers@vtk.org; Insight-users@itk.org; python-medphys@googlegroups.com<br>Subject: [vtkusers] Matching CT and RT dose coordinates<br><br><div dir="ltr">Hi all,<br><br>I am trying to overlay an dose shade on a CT slice.I am
using vtkDICOMImageReader to read the CT and vtkGDCMImageReader to
display the dose shade.But I am having problem with the coordinates.How
to relate the coordinates? For e.g: I get ImagePositionPatient of CT
image for central slice as [-275,-524,-128.25] and ImagePositionPatient
for dose as [-228.65,-419.25,-122.5] adn their spacings are
[1.074,1.074,3] and [2.52.5.2.5] respectively for CT and Rt dose.<br>
<br>The image looks as in the attached figure.<br><br>Any hint<br><br>Thanks<br><br>Jothy</div>
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