[ITK-users] [ITK] Misunderstood ResampleDICOM example behaviour

[Matt McCormick]

Guillaume make some good points.  DICOM is difficult partially because of
the variations in how metadata is stored per modality and vendor.

A couple of other tips:

- Make sure to use v4.5.2 or Git master to have the fix for writing GDCM
z-spacing.
- Watch out for variations in the rescale slope/intercept tags per slice
that are common with PET.
- Calling the static method gdcm::SetForcePixelSpacing( true ) [1] may help
with some non-standard files.

HTH,
Matt

[1]
http://gdcm.sourceforge.net/html/classgdcm_1_1ImageHelper.html#ac7534b9c604f8e4e7cdd024244aff1e2


On Tue, Apr 15, 2014 at 9:14 AM, Guillaume Lemaître
<g.lemaitre58 at gmail.com>wrote:

> Hi Nick,
>
> 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.
>
> Cheers,
>
>
>
> On 15 April 2014 14:46, NPatterson <pattersonnp.work at gmail.com> wrote:
>
>> Having done some more investigating, it appears that the origin that is
>> returned from the call:
>>
>> reader->GetOutput()->GetOrigin()
>> and
>> reader->GetOutput()->GetSpacing()
>>
>> are not returning the correct values for the PET DICOM files. I have no
>> ideas as to why this is...
>>
>>
>>
>>
>> --
>> View this message in context:
>> http://itk-insight-users.2283740.n2.nabble.com/Misunderstood-ResampleDICOM-example-behaviour-tp7585365p7585367.html
>> Sent from the ITK Insight Users mailing list archive at Nabble.com.
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>
>
> --
>
>
>
>
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