[Insight-users] Strange error when reading DICOM

[Patrik Brynolfsson]

Hello Mathieu, Thanks for the quick reply!

So different DICOM series have different sizes and orientations, is that why
it doesn't work? All images within one series have the same orientation and
size, and any one series can be read without problem. If I read multiple
series in a loop I sometimes run into trouble. Is there a way to "reset" the
reader before each new series to avoid the error?



2009/6/16 Mathieu Malaterre <mathieu.malaterre at gmail.com>

> On Tue, Jun 16, 2009 at 11:43 AM,
> Patrik.Br.<patrik.brynolfsson at gmail.com> wrote:
> >
> > Hello,
> >
> > I am trying to read DICOM series from a folder, much like in example
> > DicomSeriesReadImageWrite2.cxx. However, I modified the reader so that it
> > loops over all found series instead of just the first:
> >
> > SeriesIdContainer::const_iterator seriesItr = seriesUID.begin();
> > SeriesIdContainer::const_iterator seriesEnd = seriesUID.end();
> > std::string seriesIdentifier;
> > typedef std::vector< std::string >   FileNamesContainer;
> > FileNamesContainer fileNames;
> >
> > while( seriesItr != seriesEnd )
> >   {
> >    seriesIdentifier = seriesItr->c_str();
> >    fileNames = nameGenerator->GetFileNames( seriesIdentifier );
> >    reader->SetFileNames( fileNames );
> >        try{
> >            reader->Update();
> >            }
> >        catch (itk::ExceptionObject &ex)
> >            {
> >            std::cout << ex << std::endl;
> >            return EXIT_FAILURE;
> >            }
> >
> >       {
> >        //Some code
> >       }
> >
> >    seriesItr++;
> >   }
> >
> > However I sometimes get the error
> > "Requested region is (at least partially) outside the largest possible
> > region."
> > I first thought this was due to one faulty DICOM series, but it happens
> for
> > many series, but not all of them. It only happens when I read multiple
> DICOM
> > series i.e. when I use the loop, never when I read just one series. Also,
> > depending on what other series have been read before, some series might
> or
> > might not be read correctly without error. What's going on?
>
> This means you have DICOM files with:
> 1. Either different Image Orientation (Patient), (=itk orientation)
> 2. different dimensions (Columns / Rows).
>
> You can check that image are compatible with simple command line tool
> such as gdcminfo from GDCM 2.x package.
>
> Ref:
> http://sourceforge.net/apps/mediawiki/gdcm/index.php?title=Gdcminfo
>
> Download:
>
> http://sourceforge.net/apps/mediawiki/gdcm/index.php?title=GDCM_Release_2.0#GDCM_2.0.12_.282008.2F06.2F12.29
>
> 2cts
> --
> Mathieu
>
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