[Insight-users] Problems with Bspline grid and mask

[sere f]

Hi All,

I am registering with 2 images of the head with BSpline Transformation and
Mattes MI.

I use the mask to exclude the background so the samples for MI are taken
only from the head, but the BSpline grid is defined on all image.
The registered image is not correctly deformed. In particular it
appears flattened
 on the top of the image.
I have played with the parameters of optimizer but i have the same result.
When I register without the mask the registered image is good.
Where is  the error?
any idea?

Thank you for any suggestion.

Serena.
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