[Insight-users] registration of gray matters

[Marc Ruiz]

Hi!



I have registered two MRIs. The registration pipeline is first rigid and
then affine, and the results are ok.



But now I would try to register only the gray matter of these two images,
because I am only interested in the registration of the cortex. So, I have
segmented the 2 images and now I am trying to do the same registration
(rigid and affine) with two binary MRIs and with the same program and
parameters.



The problem is that now I get the output image all white.



First I thought it was only problem of the writer of the output image (the
interpolation of the resample filter or something like that, due to the
output is a binary image too), but I have applied the same transformation
(the one obtained from the registration of two gray matters) to a MRI and
the transformation is bad done. So, I think it is problem of the
registration…


So, some idea about the problem??

1) I have to change some parameters or the interpolation or…?
2)  Which differences I have to think about to readapt the program?
3)  Or some idea to register ok the gray matter?

Thank you!!
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