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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Dear all,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I am trying to load a series of DICOM images and visualizing them
through VTK. Although I loaded several files, the VTK just visualized one
image. What I want is to visualize all of them through VTK, not just one file. It
is better that if I scroll the mouse wheel, I can review them slice by slice.
Anyone have the experience of doing this? Could you provide an example code?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Attached is my code:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:green'>//Define image parameters<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>typedef</span>
<span style='color:blue'>float</span> InputPixelType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>typedef</span>
<span style='color:blue'>float</span> OutputPixelType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>typedef</span>
itk::Image< InputPixelType, 3 > InputImageType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>typedef</span>
itk::Image< OutputPixelType, 3 > OutputImageType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:green'>// Load DICOM files<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>typedef</span>
itk::ImageSeriesReader< InputImageType >
ReaderType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> ReaderType::Pointer reader = ReaderType::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>typedef</span>
itk::GDCMImageIO
ImageIOType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>typedef</span>
itk::GDCMSeriesFileNames
NamesGeneratorType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> ImageIOType::Pointer gdcmIO = ImageIOType::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> NamesGeneratorType::Pointer namesGenerator =
NamesGeneratorType::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> namesGenerator->SetInputDirectory( <span
style='color:#A31515'>"C:/test"</span> );<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>const</span>
ReaderType::FileNamesContainer & filenames = <o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'>
namesGenerator->GetInputFileNames();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>unsigned</span> <span
style='color:blue'>int</span> numberOfFilenames = filenames.size();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> std::cout << numberOfFilenames << <span
style='color:#A31515'>" images loaded"</span> << std::endl; <o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>for</span>(<span
style='color:blue'>unsigned</span> <span style='color:blue'>int</span> fni = 0;
fni<numberOfFilenames; fni++)<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> {<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> std::cout << <span
style='color:#A31515'>"filename # "</span> << fni << <span
style='color:#A31515'>" = "</span>;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> std::cout << filenames[fni]
<< std::endl;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> }<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> reader->SetImageIO( gdcmIO );<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> reader->SetFileNames( filenames );<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>typedef</span>
itk::ImageToVTKImageFilter<InputImageType>FilterType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> FilterType::Pointer connector = FilterType::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>try<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> {<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> reader->Update();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> }<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>catch</span>
(itk::ExceptionObject &ex)<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> {<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> std::cout << ex <<
std::endl;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> <span style='color:blue'>return</span>
EXIT_FAILURE;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> }<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> connector->SetInput(reader->GetOutput());<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> vtkImageViewer *viewer = vtkImageViewer::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> vtkRenderWindowInteractor *renderWindowInteractor =
vtkRenderWindowInteractor::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> viewer->SetupInteractor(renderWindowInteractor);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> viewer->SetInput(connector->GetOutput());<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> viewer->Render();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> viewer->SetColorWindow(255);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> viewer->SetColorLevel(128);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'> renderWindowInteractor->Start();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-indent:9.0pt'><span style='font-size:9.0pt;
font-family:NSimSun;color:blue'>return</span><span style='font-size:9.0pt;
font-family:NSimSun'> 0;</span><span style='font-size:9.0pt;font-family:NSimSun'><o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:9.0pt'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-indent:9.0pt'><span style='font-size:9.0pt;
font-family:NSimSun'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thank you very much!<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Xiaopeng<o:p></o:p></span></p>
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