Using a 2.4Ghz, 1 GB RAM, Dell Optiplex GX260, Pentium (r), CPU with 32MB Video card to display,
192x256x 94 (16bit) MR images, but it freezes while using the program medical2.cxx.  The same
program with 93 slices work ok.  I have 160 slices to display.  Why the program freeze at 94 slice
?  I have attached the program below.  Any suggestions would be most welcome please.

Thanks
Anindya 

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

int main (int argc, char **argv)
{
  if (argc < 2)
    {
      cout << "Usage: " << argv[0] << " DATADIR/headsq/quarter" << endl;
    return 1;
    }

  // Create the renderer, the render window, and the interactor. The renderer
  // draws into the render window, the interactor enables mouse- and 
  // keyboard-based interaction with the data within the render window.
  //
  vtkRenderer *aRenderer = vtkRenderer::New();
  vtkRenderWindow *renWin = vtkRenderWindow::New();
    renWin->AddRenderer(aRenderer);
  vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
    iren->SetRenderWindow(renWin);

  // The following reader is used to read a series of 2D slices (images)
  // that compose the volume. The slice dimensions are set, and the
  // pixel spacing. The data Endianness must also be specified. The reader
  // usese the FilePrefix in combination with the slice number to construct
  // filenames using the format FilePrefix.%d. (In this case the FilePrefix
  // is the root name of the file: quarter.)
  vtkVolume16Reader *v16 = vtkVolume16Reader::New();
    v16->SetDataDimensions(192,256);
    v16->SetDataByteOrderToLittleEndian();
    v16->SetFilePrefix (argv[1]);
	
    v16->SetImageRange(1, 94);
    v16->SetDataSpacing (0.86, 0.86, 1.0);


  // An isosurface, or contour value of 500 is known to correspond to the
  // skin of the patient. Once generated, a vtkPolyDataNormals filter is
  // is used to create normals for smooth surface shading during rendering.
  // The triangle stripper is used to create triangle strips from the
  // isosurface; these render much faster on may systems.
  vtkContourFilter *skinExtractor = vtkContourFilter::New();
    skinExtractor->SetInput((vtkDataSet *) v16->GetOutput());
    skinExtractor->SetValue(0, 20);
     vtkPolyDataNormals *skinNormals = vtkPolyDataNormals::New();
    skinNormals->SetInput(skinExtractor->GetOutput());
    skinNormals->SetFeatureAngle(60.0);
  vtkStripper *skinStripper = vtkStripper::New();
    skinStripper->SetInput(skinNormals->GetOutput());
  vtkPolyDataMapper *skinMapper = vtkPolyDataMapper::New();
    skinMapper->SetInput(skinStripper->GetOutput());
    skinMapper->ScalarVisibilityOff();
  vtkActor *skin = vtkActor::New();
    skin->SetMapper(skinMapper);
    skin->GetProperty()->SetDiffuseColor(1, .49, .25); //R G B
    skin->GetProperty()->SetSpecular(.3);//.3
    skin->GetProperty()->SetSpecularPower(20);
    skin->GetProperty()->SetOpacity(1.0);// 1.0

  // An isosurface, or contour value of 1150 is known to correspond to the
  // skin of the patient. Once generated, a vtkPolyDataNormals filter is
  // is used to create normals for smooth surface shading during rendering.
  // The triangle stripper is used to create triangle strips from the
  // isosurface; these render much faster on may systems.
  vtkContourFilter *boneExtractor = vtkContourFilter::New();
    boneExtractor->SetInput((vtkDataSet *) v16->GetOutput());
    boneExtractor->SetValue(0, 140);
  vtkPolyDataNormals *boneNormals = vtkPolyDataNormals::New();
    boneNormals->SetInput(boneExtractor->GetOutput());
    boneNormals->SetFeatureAngle(60.0);
  vtkStripper *boneStripper = vtkStripper::New();
    boneStripper->SetInput(boneNormals->GetOutput());
  vtkPolyDataMapper *boneMapper = vtkPolyDataMapper::New();
    boneMapper->SetInput(boneStripper->GetOutput());
    boneMapper->ScalarVisibilityOff();
  vtkActor *bone = vtkActor::New();
    bone->SetMapper(boneMapper);
    bone->GetProperty()->SetDiffuseColor(1, 1, .9412);

  // An outline provides context around the data.
  //
  vtkOutlineFilter *outlineData = vtkOutlineFilter::New();
    outlineData->SetInput((vtkDataSet *) v16->GetOutput());
  vtkPolyDataMapper *mapOutline = vtkPolyDataMapper::New();
    mapOutline->SetInput(outlineData->GetOutput());
  vtkActor *outline = vtkActor::New();
    outline->SetMapper(mapOutline);
    outline->GetProperty()->SetColor(0,0,0);

  // It is convenient to create an initial view of the data. The FocalPoint
  // and Position form a vector direction. Later on (ResetCamera() method)
  // this vector is used to position the camera to look at the data in
  // this direction.
  vtkCamera *aCamera = vtkCamera::New();
    aCamera->SetViewUp (0, 0, -1);
    aCamera->SetPosition (0, 1, 0);
    aCamera->SetFocalPoint (0, 0, 0);
    aCamera->ComputeViewPlaneNormal();

  // Actors are added to the renderer. An initial camera view is created.
  // The Dolly() method moves the camera towards the FocalPoint,
  // thereby enlarging the image.
  aRenderer->AddActor(outline);
  aRenderer->AddActor(skin);
  aRenderer->AddActor(bone);
  aRenderer->SetActiveCamera(aCamera);
  aRenderer->ResetCamera ();
  aCamera->Dolly(1.5);

  // Set a background color for the renderer and set the size of the
  // render window (expressed in pixels).
  aRenderer->SetBackground(1,1,1);
  renWin->SetSize(640, 480);

  // Note that when camera movement occurs (as it does in the Dolly()
  // method), the clipping planes often need adjusting. Clipping planes
  // consist of two planes: near and far along the view direction. The 
  // near plane clips out objects in front of the plane; the far plane
  // clips out objects behind the plane. This way only what is drawn
  // between the planes is actually rendered.
  aRenderer->ResetCameraClippingRange ();

  // Set a background color for the renderer and set the size of the
  // render window (expressed in pixels).
  iren->Initialize();
  iren->Start(); 

  // It is important to delete all objects created previously to prevent
  // memory leaks. In this case, since the program is on its way to
  // exiting, it is not so important. But in applications it is
  // essential.
  v16->Delete();
  skinExtractor->Delete();
  skinNormals->Delete();
  skinStripper->Delete();
  skinMapper->Delete();
  skin->Delete();
  boneExtractor->Delete();
  boneNormals->Delete();
  boneStripper->Delete();
  boneMapper->Delete();
  bone->Delete();
  outlineData->Delete();
  mapOutline->Delete();
  outline->Delete();
  aCamera->Delete();
  aRenderer->Delete();
  renWin->Delete();
  iren->Delete();

  return 0;
}