Hi John,
I checked segmentation and it seems to be fine (see attachment). I also
attached a checkreg between original T1 and normalized T1. They seem to
be off by a bit. What do you suggest? Should I reorient the original T1
image closer to AC-PC?
Regards,
Glad
On 14.07.2014 15:28, John Ashburner wrote:
> It looks like a segmentation failure to me. I'd suggest taking a closer
> look at the results of segmenting that subject, and maybe checking
> whether the initial alignment of your structural scan with MNI-space is
> within about 3cm and 15 degrees. Use CheckReg for this.
>
> Best regards,
> -John
>
>
>
> On 14 July 2014 13:30, Paul Glad Mihai <[log in to unmask]
> <mailto:[log in to unmask]>> wrote:
>
> Dear members of the SPM List,
>
> I followed these steps:
>
> 1. Realign & Unwarp EPIs
> 2. Slice timing correction
> 3. Coregistration of T1 to mean EPI
> 4. New Segment and create DARTEL template of T1 images from all subjects
> 5. Normalise all EPI to MNI
> 6. Noramlise individual T1 images
>
> Everything works fine except for one subject, see attached image. The
> image is normalized but somehow shifted. The coregistration worked fine,
> as seen on the right side of the attachment.
>
> Can anybody give me a hint as to why this happens to this one subject
> and not to any of the other ones? Can I maybe get this information from
> the flow field by looking at it?
>
> Regards,
> Glad
> --
> Glad MIHAI, M.Sc. Biomedical Physics
> Functional Imaging | University Clinic Greifswald
> Walther-Rathenau-Straße 46 | 17475 Greifswald | Germany
> Tel: +49 3834 86 69 44 <tel:%2B49%203834%2086%2069%2044> | Fax: +49
> 3834 86 68 98 <tel:%2B49%203834%2086%2068%2098>
> www.baltic-imaging-center.de <http://www.baltic-imaging-center.de>
>
>
--
Glad MIHAI, M.Sc. Biomedical Physics
Functional Imaging | University Clinic Greifswald
Walther-Rathenau-Straße 46 | 17475 Greifswald | Germany
Tel: +49 3834 86 69 44 | Fax: +49 3834 86 68 98
www.baltic-imaging-center.de
|