[Insight-users] image masking

[Rupert Brooks]

Hi,
I am trying to register two images, and one of them (a fan-shaped
ultrasound image) is only relevant in a certain region of interest, with
the rest being meaningless and set to zero.

Is there a way to set a region of interest so that metrics (and other
operators) will only process an arbitrary shaped subregion of the
image?  It seems that the ImageRegion type classes are for rectangular
image subsets.

thanks
Rupert B.
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Rupert Brooks
McGill Centre for Intelligent Machines (www.cim.mcgill.ca)
Ph.D Program in Intelligent Systems
http://www.cyberus.ca/~rbrooks
rbrook at cim.mcgill.ca
ICQ: 27978014