Hi Doug, Thanks.
Could I check my workflow to perform the constrained smoothing of PET MGX-GM volumes? My objective here is to normalise the PET volumes to the CVS-MNI152 space to produce group-level PET maps. As such, should I be deriving the GM + Subcortical PVFs from the cvs_avg35_inMNI152 subject for the mask in mri_fwhm? 1. mri_cvs_register to bring T1s to CVS MNI152 2. mri_vol2vol to bring the PET MGX-GM volumes (already in anatomical T1 space) to CVS MNI152 3. mri_fwhm to smooth the PET volumes, using a binarised mask of GM+Subcortical PVFs from the cvs_avg35_inMNI152 subject 4. What is the best way to get the mask from the cvs_avg35_inMNI152 subject? 5. Obtain group level PET maps in CVS MNI152 space using mri_concat —mean. Thanks very much. Best Wishes, Elijah > On 4 Oct 2017, at 14:51, Douglas Greve <gr...@nmr.mgh.harvard.edu> wrote: > > You mean for volume-based analysis? Yes, use the pvf. > > On 10/4/17 9:42 AM, Elijah Mak wrote: >> Hi Doug, >> >> I have used PETSURFER to derive MGX GM volumes from PET data. Now, I would >> like to constrain the smoothing to the GM. Is it advisable to use the PVF in >> the aux folder for this purpose? If not, what is the best approach do this? >> >> Thanks! >> >> Best Wishes, >> Elijah >> >> >> >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu <mailto:Freesurfer@nmr.mgh.harvard.edu> >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> <https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer> > _______________________________________________ > Freesurfer mailing list > 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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