Following SPM5 normalization of the functional data sets after
segmentation, we are getting a distortion on functional data in only
two subject from our study. We have a full brain EPI acquisition, not
partial. We wonder which may be the reason and if going back to EPI
normalization after anatomical one (e.g. SPM2, without segmentation) may solve
this problem or, are we introduccing any change because of the difference in
the normalization procedure between subjects?
We have checked corregistration between both T1 and EPI images and it is OK.
Thanks in advance.