Hi Eduardo,

On 08/15/2012 04:24 PM, Eduardo Europa wrote:

Hello,

I have two questions:

First: I made left hemisphere anatomical ROIs using the freesurfer cortical parcellation atlas and fsaverage's data. However, when I convert these ROIs from .mgz to an SPM-compatible format (.img), the LH ROIs show up on the right. Any idea on how to resolve this problem?

Use nifti instead of img.

The ROIs I need are customized (i.e., I needed to merge some of the areas, and did so via relabeling), but for simpler purposes let's just say I used lh.BA44.label for now. Here are the commands I used:

cd $FREESURFER_HOME/subjects/fsaverage mri_label2vol --label label/lh.BA44.label --temp mri/T1.mgz --identity --o lh.BA44.mgz mri_convert lh.BA44.mgz lh.BA44.img

Second: I would like to normalize these anatomical ROIs to MNI space in SPM. To do this I was thinking about taking fsaverage's anatomical file, converting it to an SPM-compatible format, estimate the normalization parameters from fsaverage's anatomical to SPM's T1 template, and then writing those parameters to the anatomical ROIs. Therefore am I correct in converting fsaverage's T1.mgz to .img since I am specifying that as the template in the mri_label2vol above?

If the ROIs are in fsaverage space (same as MNI305), then you can use mri_label2vol with $FREESURFER_HOME/average/mni152.register.dat to convert to mni152 space

doug

Thanks!

-- Eduardo Europa Ph.D. Student, Aphasia and Neurolinguistics Research Laboratory President, Queer Pride Graduate Student Association Co-Chair, Graduate Leadership Council Member, LGBTQA Campus Advisory Network

Northwestern University Department of Communication Sciences and Disorders Frances Searle Building 2240 Campus Drive Evanston, IL 60208-3570 europa@u.northwestern.edu mailto:europa@u.northwestern.edu

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