[vtkusers] VOI and introduced edges

[John Biddiscombe]

Hello All,

I need to extract a region of trebecular bone and compute the surface area
of the strucures inside, but the region may be quite a complex shape and the
extracted piece will have new "edges" which are introduced by the slicing
operation and cause an error in the surface area calculation...(using
vtkMassProperties)

My first thought is to generate a polyhedral representation of the VOI and
compare all the facets of the surface with the facets of the VOI and
decrease the surface area accordingly if the facets lie on the sliced
surface.

Can anyone comment on this and suggest whether it would work or even
introduce new problems.

Thanks.