Hi Dorian,
with Volkmar's Volumes toolbox you can flip volumes in any direction. Check
the SPM Extension page for the download link.
Jan
Anonim wrote:
> Dear all, it's my first time in the mailing list. Hope it works :)
>
> I have converted all my DICOM images using a third party software.
> After preprocessing and analyzing around 15 subject I discovered the
> left and right sides are inverted. Therefore the results I get are all
> in the opposite side. My boss told me this can be resolved simply by
> multiplying X to -1 in the results. I don't know if this is correct
> (maybe normalizing was also affected as left and right hemisphere may
> not be equal in the EPI.nii template I use to normalize). However,
> taking for good all the preprocessing, can I swap left and right in
> all pre-processed images ? I need to estimate again all subjects'
> designs for another reason and thought this is the right moment to
> correct the problem.
>
> I am trying to figure this out myself. In theory should be enough
> multiplying the x coordinates with -1 in all images, but I cannot find
> an easy procedure for this in SPM.
>
> Any insight is welcome (also about the effects of swapped sides in normalizing).
>
> P.s. I don't use coregister or segmentation. I simply normalize all
> the images to the EPI template calculating the parameters from the
> comparison of the EPI with one of the volumes.
>
> Best regards.
> Dorian.
>
--
Jan Gläscher, Ph.D. Div. Humanities & Social Sciences
+1 (626) 395-3898 (office) Caltech, Broad Center, M/C 114-96
+1 (626) 395-2000 (fax) 1200 E. California Blvd
[log in to unmask] Pasadena, CA 91125
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