[vtkusers] Highlight a contoured portion of Volume.

[M B Sai Mahesh]

Hi all, 
I am new to vtk. Iam using vtk and Qt for the cbct application where 3D Volume is renedered using VTK. I want to segment the volume based on the freehand curves drawn on axial slices by the user. 
At present I am  collecting the values inside the curve for each slice and stacking them together to form a volume. Is there an efficient way of doing this without creating copies of the volume data. any examples or suggestions?  


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