[ITK] ITK try to read 4D dicom time series(3d, t), but get 3d*t

[Chen, Lifan]

Hi all,

These days, I am trying to use ITK to handle 4D dicom series (3d+t). I use GDCMSeriesFileNames to generate seriesUIDs and ImageSeriesReader to read these images.

The following is part of my code:
typedef double    PixelType;
typedef itk::Image< PixelType, 4>         Image4DType;                  //4D image type
typedef itk::Image< PixelType, 3>         Image3DType;                  //3D image type
typedef itk::ImageSeriesReader< Image4DType >        ReaderType;
typedef itk::GDCMImageIO       ImageIOType;
reader = ReaderType::New();
dicomIO = ImageIOType::New();
typedef itk::GDCMSeriesFileNames NamesGeneratorType;
NamesGeneratorType::Pointer nameGenerator = NamesGeneratorType::New();
nameGenerator->AddSeriesRestriction("0008|0021");
nameGenerator->SetUseSeriesDetails(true);
nameGenerator->SetDirectory(_filename);
typedef std::vector< std::string >    SeriesIdContainer;
const SeriesIdContainer & seriesUID = nameGenerator->GetSeriesUIDs();
_isFileLoaded = !(seriesUID.empty());
if (true == _isFileLoaded){
SeriesIdContainer::const_iterator seriesItr = seriesUID.begin();
SeriesIdContainer::const_iterator seriesEnd = seriesUID.end();
std::string seriesIdentifier = seriesUID.begin()->c_str();
typedef std::vector< std::string >   FileNamesContainer;
FileNamesContainer fileNames;
fileNames = nameGenerator->GetFileNames(seriesIdentifier);
reader->SetFileNames(fileNames);
reader->SetImageIO(dicomIO);
reader->Update();
}

I have tried this code and the reader worked well. However I got a [x,y,z*t, 1] data, but not [x, y, z, t] data. I understand the problem may caused by nameGenerator, but I use SetUseSeriesDetails and AddSeriesRestriction("0008|0021")(aquisition time)which are implied by documents to handle 4d images.I have also tried several methods but all not work. I wonder whether ITK have an original method to handle 4d images.

Have anyone ever met this problem before? Any help or recommendations would be appreciated.

Thanks,
Lifan


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