[vtkusers] How to speed imageviewer2 display when used it's SetSliceOrientationToXZ function??

[kai zhu]

Hello everyone
VTKimageviewer2 is a good class to show dicom image,but when i
use SetSliceOrientationToXZ to change image Orientation of display,it
became very slow,what should i do to solve this question,how to speed up
display.

kai zhu
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