[vtkusers] vtkVolume16Reader

[LIAM JAMES ATKINS]

i am having trouble with displaying a ct scan using the vtkVolume16Reader i have transported it from dicom format to raw format but it just shows a very faint outline of the scan it vaguely looks like it should and appears 4 times. i gather the reason for it appearing 4 times is because it is an 8 bit raw file.

so i need help on why im am not getting a decent image up and how to change it from an 8 bit file to a 16 bit file can any one help??

the code is:

#include "vtkPolyDataMapper.h"
#include "vtkActor.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkProperty.h"
#include "vtkCamera.h"
#include "vtkContourFilter.h"
#include "vtkVolume16Reader.h"
#include "vtkPolyDataNormals.h"


int main (int argc, char **argv)
{



	vtkRenderer *aRenderer = vtkRenderer::New();
	vtkRenderWindow *renWin = vtkRenderWindow::New();
    renWin->AddRenderer(aRenderer);
	vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
    iren->SetRenderWindow(renWin);
	vtkVolume16Reader *v16 = vtkVolume16Reader::New();
    v16->SetDataDimensions(217,181);
	v16->SetImageRange (1,2000);
	v16->SetDataByteOrderToLittleEndian();
    v16->SetFilePrefix("brainweb1e1a10f20");
    v16->SetFilePattern("brainweb1e1a10f20.raw");
	v16->SetDataSpacing (72, 126, 90);
	v16->Update();
  vtkContourFilter *skinExtractors = vtkContourFilter::New();
    skinExtractors->SetInput((vtkDataSet *) v16->GetOutput());
    skinExtractors->SetValue(0, 500);
  vtkPolyDataNormals *skinNormals = vtkPolyDataNormals::New();
    skinNormals->SetInput(skinExtractors->GetOutput());
    skinNormals->SetFeatureAngle(60.0);
  vtkPolyDataMapper *skinMapper = vtkPolyDataMapper::New();
    skinMapper->SetInput(skinNormals->GetOutput());
    skinMapper->ScalarVisibilityOff();
  vtkActor *skin = vtkActor::New();
    skin->SetMapper(skinMapper);

  aRenderer->AddActor(skin);
  aRenderer->SetActiveCamera(aCamera);
  aRenderer->ResetCamera ();
  aCamera->Dolly(1.5);


  aRenderer->SetBackground(1,1,1);
  renWin->SetSize(640, 480);

 
  aRenderer->ResetCameraClippingRange ();

  iren->Initialize();
  iren->Start(); 

 
  v16->Delete();
  skinExtractors->Delete();
  skinNormals->Delete();
  skinMapper->Delete();
  skin->Delete();
  aCamera->Delete();
  iren->Delete();
  renWin->Delete();
  aRenderer->Delete();

  return 0;
}