Hello,
I agree that you have a problem, but I think it is only one: your data
import step seems to have gone wild. Either you have some very funny
brains or the data is not read correctly. The upper image looks
compressed in z (top-bottom) while the lower looks compressed in x
(left-right). As spm makes some reasonable assumptions about how a brain
usually looks like, data that is too far off will violate these
assumptions, and the following processing steps may not work. I would
double check the initial import step (do the images look ok in spm?) and
try alternatives. If the brains look a bit more normal, then I would
expect the segmentation to perform better.
Hope this helps.
Marko
meikei wrote:
> Dear all,
> I have 2 problems:
> (1) Some of my T1 images can't be segmented 'normally', although no
> computation errors were met during segmentation (attached fig, upper:
> the T1, lower: the segmented grey matter). Do you have any ideas of what
> causing it? Is there any ways of correcting it?
> (2) Although some of the other T1 images can be segmented 'normally',
> but there is some strange 'light-band' over the cortex (attached fig,
> crosshair on Sagittal view). What is that and what may have caused it?
> Thanks a lot!
> Best wishes,
> Meikei
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Marko Wilke (Dr.med./M.D.)
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Universitäts-Kinderklinik University Children's Hospital
Abt. III (Neuropädiatrie) Dept. III (Pediatric neurology)
Hoppe-Seyler-Str. 1, D - 72076 Tübingen
Tel.: (+49) 07071 29-83416 Fax: (+49) 07071 29-5473
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