Dear SPM experts, I got a wrong segmentation after coregistering my high resolution T1 3D anatomy to the mean EPI. The coregistration turned out to be fine when I checked registration. But the segmentation went completely wrong after the coregistration. When I checked the c1 and c2, they hardly have any shape of the brain. Has anyone had this problem before? Could it be the orientation of my anatomy? Is there a way to fix this? Thanks, Wei