>
> Hi Vina,
>
> You may use one of the included atlases to create a frontal mask. I recently
> created a frontal mask (excluding precentral gyrus) using the
> HarvardOxford-cort-maxprob-thr25-2mm atlas. You'll find
> that atlas in $FSLDIR/data/atlases/HarvardOxford, along
> with some others as well. I overlaid the atlas on the standard brain and
> poked around until I identified all of the regions I wanted to include by
> cluster number (see list below). Then I used fslmaths to create a binary
> image for each of the 11 frontal regions I wanted to include, with 1 for the
> region and 0 everywhere else, like this:
>
> fslmaths HarvardOxford-cort-maxprob-thr25-2mm -thr 29 -uthr
> 29 acc
>
> where acc is the output file name since 29 is the cluster number associated
> with the ACC.
>
> I then summed all the masks into one:
>
> fslmaths acc -add paracingulate -add sfg -add midfg (and so on) allfrontal
>
> where allfrontal is the name of the frontal mask output by this command.
>
> You can probably do it all in one command, but my brain moves slowly
> sometimes. :) In any case, before using the list below, make sure these are
> all areas of interest to you, and also check the cluster numbers in case
> there's an error.
>
> Cheers,
>
> Heather
>
> ACC 29
> Paracingulate 28
> SFG 3
> MidFG 4
> Frontal Orbital 33
> SMA 26
> Subcallosal 27
> Frontal Medial 25
> IFG pars triangularis 5
> IFG pars opercularis 6
> Frontal pole 1
>
>
> On Tue, Sep 2, 2008 at 8:53 PM, Vina Goghari <
[log in to unmask]> wrote:
> > Hello,
> > I would like to create a frontal lobe mask to use in my higher-level
> analyses. I have already conducted higher-level analyses, so I have a group
> bg_image.
> >
> > My question is what is the best way to create a mask of just the frontal
> region? Could I use featquery to do so? In which case would I use the group
> bg image to have the mask created from?
> >
> > Thanks,
> > Vina
> >
>
>
>
> --
> Heather L. Urry
> Department of Psychology
> Tufts University
> 490 Boston Avenue
> Medford, MA 02155
>
> email:
[log in to unmask]> phone: 617-627-3733
> fax: 617-627-3181
>
