1 // This example illustrates how the vtkGdcmReader vtk class can be
3 // * produce a simple (vtk based) Dicom image STACK VIEWER.
4 // * dump the stack considered as a volume in a vtkStructuredPoints
5 // vtk file: the vtk gdcm wrappers can be seen as a simple way to convert
6 // a stack of Dicom images into a native vtk volume.
9 // * the filenames of the Dicom images constituting the stack should be
10 // given as command line arguments,
11 // * you can navigate through the stack by hitting any character key,
12 // * the produced vtk file is named "foo.vtk" (in the invocation directory).
14 //----------------------------------------------------------------------------
17 #include <vtkRenderWindowInteractor.h>
18 #include <vtkImageViewer2.h>
19 #include <vtkStructuredPoints.h>
20 #include <vtkStructuredPointsWriter.h>
21 #include <vtkCommand.h>
22 #include <vtkRenderer.h>
23 #include <vtkImageMapToColors.h>
24 #include <vtkLookupTable.h>
26 #include "vtkGdcmReader.h"
28 #ifndef vtkFloatingPointType
29 #define vtkFloatingPointType float
32 //----------------------------------------------------------------------------
33 // Callback for the interaction
34 class vtkgdcmObserver : public vtkCommand
37 virtual char const *GetClassName() const { return "vtkgdcmObserver";}
38 static vtkgdcmObserver *New()
39 { return new vtkgdcmObserver; }
42 this->ImageViewer = NULL;
44 virtual void Execute(vtkObject *, unsigned long event, void* )
46 if ( this->ImageViewer )
48 if ( event == vtkCommand::CharEvent )
50 int max = ImageViewer->GetWholeZMax();
51 int slice = (ImageViewer->GetZSlice() + 1 ) % ++max;
52 ImageViewer->SetZSlice( slice );
53 ImageViewer->GetRenderer()->ResetCameraClippingRange();
54 ImageViewer->Render();
58 vtkImageViewer2 *ImageViewer;
62 int main(int argc, char *argv[])
67 vtkGdcmReader *reader = vtkGdcmReader::New();
68 reader->AllowLookupTableOff();
71 reader->SetFileName( argv[1] );
73 for(int i=1; i< argc; i++)
74 reader->AddFileName( argv[i] );
80 reader->GetOutput()->Print( cout );
82 vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
84 vtkImageViewer2 *viewer = vtkImageViewer2::New();
86 if( reader->GetLookupTable() )
89 vtkImageMapToColors *map = vtkImageMapToColors::New ();
90 map->SetInput (reader->GetOutput());
91 map->SetLookupTable (reader->GetLookupTable());
92 map->SetOutputFormatToRGB();
93 viewer->SetInput ( map->GetOutput() );
98 viewer->SetInput ( reader->GetOutput() );
100 viewer->SetupInteractor (iren);
102 //vtkFloatingPointType *range = reader->GetOutput()->GetScalarRange();
103 //viewer->SetColorWindow (range[1] - range[0]);
104 //viewer->SetColorLevel (0.5 * (range[1] + range[0]));
106 // Here is where we setup the observer,
107 vtkgdcmObserver *obs = vtkgdcmObserver::New();
108 obs->ImageViewer = viewer;
109 iren->AddObserver(vtkCommand::CharEvent,obs);
115 //if you wish you can export dicom to a vtk file
116 vtkStructuredPointsWriter *writer = vtkStructuredPointsWriter::New();
117 writer->SetInput( reader->GetOutput());
118 writer->SetFileName( "foo.vtk" );
119 writer->SetFileTypeToBinary();