<div dir="ltr">Guillaume make some good points. DICOM is difficult partially because of the variations in how metadata is stored per modality and vendor.<div><br></div><div>A couple of other tips:</div><div><br></div><div>
- Make sure to use v4.5.2 or Git master to have the fix for writing GDCM z-spacing.</div><div>- Watch out for variations in the rescale slope/intercept tags per slice that are common with PET.</div><div>- Calling the static method gdcm::SetForcePixelSpacing( true ) [1] may help with some non-standard files.</div>
<div><br></div><div>HTH,</div><div>Matt</div><div><br></div><div>[1] <a href="http://gdcm.sourceforge.net/html/classgdcm_1_1ImageHelper.html#ac7534b9c604f8e4e7cdd024244aff1e2">http://gdcm.sourceforge.net/html/classgdcm_1_1ImageHelper.html#ac7534b9c604f8e4e7cdd024244aff1e2</a></div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Apr 15, 2014 at 9:14 AM, Guillaume Lemaître <span dir="ltr"><<a href="mailto:g.lemaitre58@gmail.com" target="_blank">g.lemaitre58@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Nick,<div><br></div><div>From what you are bringing up, it seems that the problem could be during the reading. Could you check the value of tag manually. I mean not with gdcm to see if you obtained the same output (I would go with matlab). If the values are the same, the problem if any could come from what is already written in the header of the DICOM and not itk.</div>
<div><br></div><div>Cheers,</div><div><br></div></div><div class="gmail_extra"><div class=""><br><br><div class="gmail_quote">On 15 April 2014 14:46, NPatterson <span dir="ltr"><<a href="mailto:pattersonnp.work@gmail.com" target="_blank">pattersonnp.work@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Having done some more investigating, it appears that the origin that is<br>
returned from the call:<br>
<br>
reader->GetOutput()->GetOrigin()<br>
and<br>
reader->GetOutput()->GetSpacing()<br>
<br>
are not returning the correct values for the PET DICOM files. I have no<br>
ideas as to why this is...<br>
<br>
<br>
<br>
<br>
--<br>
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