hi,maybe this code can help you,these files are DICOM3.0(512*512*16bit*200)
vtkImageReader *reader=vtkImageReader::New();
reader -> SetDataByteOrderToLittleEndian();
reader -> SetFilePrefix(".../data/dicom");
reader -> SetHeaderSize(3606);
reader -> SetDataExtent(0,511,0,511,1,200);
reader -> SetDataMask(0xffff);