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<div>We have a relatively simple pipeline that most just extracts the region of interest for display:</div>
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<div>itk::Image<4></div>
<div>itk::ExtractImageFilter<4D, 3D></div>
<div>itk::RegionOfInterestImageFilter</div>
<div>itk::ImageToVTKImageFilter</div>
<div>vtkFixedPointVolumeRayCastMapper->vtkVolume and vtkOutlineFilter->vtkPolyDataMapper->vtkActor</div>
<div>vtkRenderer</div>
<div>vtkCocoaRenderWindow</div>
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<div>As the user moves the mouse, we construct a new itk::RegionOfInterestImageFilter and pop it into the pipeline. This works fine for a lot of mouse motion, but after some amount of time the image freaks out and changes from a nice zoomed view of a CT image
to something resembling bubbles or tendrils (see attached image for one example).</div>
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<div>We're using vtk 5.8.0, right now upgrading isn't really an option due to business constraints. We have the same problem with a different application that is using a similar pipeline but an older version of vtk.</div>
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<div>I've gone over the code with a fine-tooth comb and can't find anything suspicious.</div>
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<div>Any suggestions about what might cause this behavior? Has anybody seen this kind of output before?</div>
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<div>Thanks,</div>
<div>Chris</div>
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