[Insight-users] [Gdcm2] Reading DICOM spacing

[Mathieu Malaterre]

On Mon, Apr 26, 2010 at 12:48 PM, Mario Ceresa <mrceresa at gmail.com> wrote:
> Thanks Jean-Pierre you are right.
>
> I read the original images from the directory and ITK (which uses
> gdcm) gives the correct values for the spacing:
>
> In [4]: img.GetSpacing()
> Out[4]: itkVectorD3([0.808594, 0.808594, 5])
>
> The image I sent was the first step of a long processing algorithm and
> I wasn't aware that I should have changed the dicom tag manually to
> reflect the change.
>
> So probably it is not a *legal* image and gdcm has all the rights to
> misbehave. Still a warning somewhere would have been helpful :)

Correct. Please open a bug report for this, I thought this was fixed
at some point, but maybe is this fixed only when using ITK+GDCM 2.x.

> Is there any way to get familiarized with those subtle aspects of the
> dicom standard without reading the full specification?
>
> Do you know of any "dicom image validator" to check for similar
> problem in the future? I found the one from offis:
>
> http://dicom.offis.de/dcmcheck.php.en
>
> but there is no source code nor binary available.

I use dciodvfy from the dicom3tools package.

-- 
Mathieu