Thnanks Johnathan for answering Emilia. I have two additional questions. When preprocessing for assymetry analyses with VBM, should we flip the original SPGR images, and then segmen them using the symmetric template, or shall we flip the already segmented images (perhaps there should not be a differnce?). Secondly, can we use the Darltel algoritm for reorientation, and normalization, or should we skip Dartel and only use the symmetrical template? Which template is Dartlel using, and if it is the MNI, can we somehow adit in our own symmetrical template?
Ivanka Savic
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Från: SPM (Statistical Parametric Mapping) [[log in to unmask]] för Jonathan Peelle [[log in to unmask]]
Skickat: den 7 juli 2011 19:46
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Ämne: Re: [SPM] use imcalc to flip image LR?
Dear Emilia,
> How should I use Imcalc to do LRflip of images?
> Or is there a better way to flip the image so the image information is still
> the same (and I can use the images in the same analysis as the non flipped
> images)?
In addition to ImCalc, you could also try the FSL command fslswapdim:
fslswapdim input.nii -x y z output.nii
(but best check to make sure the output looks reasonable).
Hope this helps!
Best regards,
Jonathan
--
Dr. Jonathan Peelle
Department of Neurology
University of Pennsylvania
3 West Gates
3400 Spruce Street
Philadelphia, PA 19104
USA
http://jonathanpeelle.net/
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