Sudhin,
As far as I know (doug greve may comment later) it should never be necessary to stretch or scale a functional to fit the structural. Intuitively this is the case because it is the same brain in both images, so only orientation should change, if even that if the subject remained motionless in the scanner and assuming the structure and functional were run in the same session.
Make certain that subject structural and functional data was not somehow mixed-up (trying to align one subject with another). Also, if Analyze formatted files were used in any step of the workflow, there is a good chance that left and right were reversed (although that would not entail scaling changes to an attempt to correct).
Nick
On Feb 22, 2013, at 5:14 PM, Sudhin A. Shah wrote:
Hello,
I manually checked the registration of my free surfer parcellations to the rsfMRI data after reg-feat2anat and aseg2feat.
Problem is that I had to scale (stretch) the functional to make a good fit in several cases. Is this recommended? How can I avoid this?
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