Doug (Bruce and Trisanna)-
Thank you all for your help. I do, indeed, have a volume, then label, and see now how to load and view this properly. I've gotten through the "label2label" step and now have a label (from subA) in subB space. If I now want to back-project this label to subB's input MRI volume, would I run the following?
(Assuming I invert the steps I did to get the original binary mask to subA's surface, as a label)
mri_label2vol --label $SUBJECTS_DIR/subA/tmpdir/rh.roi_to_subB.label \ --subject subB \ --temp brainmask.mgz \ --regheader brainmask.mgz \ --o $SUBJECTS_DIR/subA/tmpdir/roi_to_subB.mgz \ --surf pial
mri_surf2vol --surfval $SUBJECTS_DIR/subA/tmpdir/roi_to_subB.mgz \ --volregidentity subB --template $SUBJECTS_DIR/subB/mri/orig.mgz --hemi rh \ --o $SUBJECTS_DIR/subA/tmpdir/roi_to_subB_orig.mgz
"label2vol" works but I'm now stuck on the "surf2vol" command. I end up with the following error:
ERROR: dimension inconsistency in source data Number of surface vertices = 128997 Number of value vertices = 16777216
-Joel
On 10/04/2016 02:45 PM, Douglas N Greve wrote:
The rh.roiS.mgh file is a surface overlay (ie, one value per vertex), not a surface itself (which would have a list of vertices, the XYZ for each, and neighborhood relations). When you loaded rh.roiS.mgh as a surface overlay, did you change the threshold to be 0.5? The default is 2, and if your ROI is binary (0,1), then no voxels would ever appear above threshold
On 10/03/2016 03:20 PM, Joel Bruss wrote:
Sorry, it sent before I finished. I'll try this again.
On 09/30/2016 02:00 PM, Douglas N Greve wrote:
First, bring up the ROI on the volume along with the surface in the volume. You can do this with FreeView. Make sure that the ROI intersects the surface.
Yes, this looks fine
Then run mri_vol2surf so sample the binary ROI volume onto the surface.
This is what I ran:
mri_vol2surf --src $SUBJECTS_DIR/subA/tmpdir/roi.mgz \ --out $SUBJECTS_DIR/subA/tmpdir/rh.roiS.mgh \
You can view the ROI on the surface by loading it as an overlay.
This is a volume or a surface now? Is it just a volume resampled to the
surface space? I can't get it to load in freeview as a surface (it just crashes), and it doesn't look like anything as an overlay.
Then run mri_cor2label using the surface-sampled ROI as input and specifying --surf (see the --help) to make this a surface-based label.
I next ran this: mri_cor2label --id 1 --c $SUBJECTS_DIR \ --i $SUBJECTS_DIR/subA/tmpdir/rh.roiS.mgh \ --l $SUBJECTS_DIR/subA/tmpdir/rh.roi.label \ --surf subA rh
You can also view this label in the surface in freeview.
At this point, it just kept loading and loading and loading and I'd finally have to kill the process. I never could visualize this output.
Finally,run mri_label2label using the --regmethod surface
At this point, I must just be feeding bad data into good commands: mri_label2vol --label $SUBJECTS_DIR/subA/tmpdir/rh.roi_to_subB.label \ --subject subB \ --temp brainmask.mgz \ --regheader brainmask.mgz \ --o $SUBJECTS_DIR/subA/tmpdir/roi_to_subB.mgz \ --surf pial
I don't know where things went wrong or how to view the output to diagnose.
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