Hello Fellow spm users,
I am referring to John Ashburner's comment on the Preliminaries step under
Unified Segmentation (wikibooks). The first step on page 3, under Unified
Segmentation, and Preliminaries, he suggests to make sure that the images
are "reasonably well aligned with the template", using the Check Reg
function. However, no matter what order we open the images in, the second
batch of images is always misaligned.
We have tried listing the template first, and then subject's images are
misaligned. When we try opening the subject's images first, then the
template's files are misaligned. However, when one opens the subject's
images using the Display function, the crosshairs position looks great and
is aligned with the templates. It seems therefore that there may be a bug
in the system which misaligns the second set of images that are displayed
in the Check Reg function. Has anyone else had this problem?
And, how important is this step, since in the unified segmentation step,
the images are normalized to a template anyway?
Grateful for any suggestions, hints, etc...
Thanks so much,
Lea
|