Attached two spm2.ps files with different head movements patterns: slow
drift in the session and abrupt head movement between sessions.
A couple of questions:
1. In general, is movement between sessions preferable than during the
session and it can be better corrected in realignment procedure?
Consequently, 2 mm drift during the session is much more harmfully than
2. As far as I understand, what I see in spm2.ps is what was really
corrected during the realignment. Is the any tool to make visual inspection
to assess whether realignment was good? Something similar to AnalyzeMovie of