[Insight-users] Spacial object as a masks to create a ROI?

[jef vdmb]

Hi,

I am working on a registration with an US image. I first used the region of 
interest filter to limit the calculations of the metric to a desired region. 
  This filter only allowes rectangular regions, which is not a suitable 
shape for an US image. I saw I can pass a mask ( a binary image ) to the 
metric.
Does this mean that this would have the same result as a region of interest 
filter, only calculating the metric where the mask is 1?

Thank you for any advice,

Jef