[vtkusers] Display issue of vtkImageViewer2 for Sagittal and Coronal view

[Liu_tj]

Hi, VTK expert guys,

At present I use vtkImageViewer2 to display 3 views of DICOM series. Now I have display issue for Sagittal and Coronal view. When display the first (number 0) slice, all 3 views are fine. However, when I use the mousewheel to change the slice number by vtkImageViewer2::SetSlice(), Sagittal and Coronal view won't display anything. Axial view is ok.

For the plane orientation, I call vtkImageViewer2::SetSliceOrientationToYZ() for Coronal view, and vtkImageViewer2::SetSliceOrientationToXZ() for Sagittal view.

Thanks
Liu Peng
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