[Insight-users] restrict level set filter to a non-rectangular region

[somi]

Hi,

a) Is is possible to restrict the growth of level set filter to a user
defined volume ?
    For example, in the attached CT image, if a seed point is put at the
blue cross point, and we want to grow a region only in the cylindrical
reddish region specified by the user,
   can we restrict the region growing only to that region ? I want to
minimize calculations and memory utilization


b) Can we apply an ITK  filter only to specific non-rectangular region (
like the conical region in the attached image ) ?


Thanks,
Somi
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