Hi Anastasia, Thanks for the clarification. I am happy to hear that you are working on that! As the byvoxel data includes MNI coordinates, I though it could be possible to assemble them to MNI 3D space. Thanks again! Pedro Rosa.
On Monday, July 6, 2015 at 12:19 PM, Anastasia Yendiki wrote: > > Hi Pedro - The point-wise stats from tracula are a 1D sequence of values, > so they cannot be analyzed with functions that work on 2D data on the > surface or 3D data in the volume. At present, you'd have to do a seperate > analysis for every point along the tract. It's on my list to implement a > more comprehensive and principled solution for this and will hopefully get > around to it soon! > > BTW, the diffusion measures are extracted by tracula in the native space, > not in a template space. An average path in template space is produced in > case you want to visualize something on an average brain, but all the > pointwise and average FA/MD/etc values are extracted in the native DWI > space of each subject. > > Best, > a.y > > On Sun, 5 Jul 2015, Pedro Rosa - GMail wrote: > > > Dear Developers, > > Tracula’s Statistics wiki suggests one to use the statistical software of > > choice. > > Could it be glmfit? > > For that, I think I would need to concatenate each tract-by-voxel diffusion > > data > > from each subject (e.g., each diffusion data of course separately) in > > common space > > (e.g., MNI) and then input it to mri_glmfit / mri_glmfit-sim, whose output > > sig.mgh > > would be loaded in Freeview as a heatmap. > > I understood that diffusion data in Tracula is saved in .txt files, which > > cannot be > > inputed into mri_preproc or mri_label2vol. Is it possible to use glmfit > > with Tracula > > outputs? > > Thanks in advance, > > Pedro Rosa. > > > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu (mailto:Freesurfer@nmr.mgh.harvard.edu) > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > The information in this e-mail is intended only for the person to whom it is > addressed. If you believe this e-mail was sent to you in error and the e-mail > contains patient information, please contact the Partners Compliance HelpLine > at > http://www.partners.org/complianceline . If the e-mail was sent to you in > error > but does not contain patient information, please contact the sender and > properly > dispose of the e-mail. > >
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