Hi everybody,
I encountered a slice timing error which I don't understand. I performed
four sessions in a row on each subject, and I tried to preprocess all
sessions at once. At slice timing, I entered all images from all 4
sessions into one session. This worked perfectly for dozens of subjects
in previous studies, but in this study in about 20% of Ss the very first
image is distorted, as if even/odd slices were *moved* into different
directions. I checked a number of other images from these subjects, but
I could find the error only in the first image of the first session.
I got around this problem by entering each session separately. But I
report this, since an underlying bug might also cause other problems - I
read that related problems already occured in SPM 2.
Thanks
Dominik
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