Re: [Freesurfer] mri_glmfit-sim - Clusterwise correction for multiple comparisons.

2023-10-15 Thread Douglas N. Greve
This is the kind of thing that happens with clusterwise corrections. It is hard to predict what happens. When you raise the threshold, you lose some of the activation in your real map (ie, clusters become smaller). But in the Null map, clusters also become smaller. So, at the lower threshold, t

Re: [Freesurfer] Use of *inflated resulst from recon-all

2023-10-15 Thread Douglas N. Greve
On 9/28/2023 4:13 PM, Lesage, Anne-Cecile wrote: External Email - Use Caution Dear Freesurfer teams I am working on sEEG data to help localize the epileptogenic zone at UTMB. We were wondering with Dr Karas if we could use the *.inflated surface to view better the electrodes in cont

Re: [Freesurfer] convert to fsaverage

2023-10-15 Thread Douglas N. Greve
If that is a volume label, then you will have to sample it on the surface, eg, with mri_vol2surf. This will create a segmentation on the surface (not a label). You can use vol2surf to map it all the way to fsaverage, or you can map it on the native surface then use mris_apply_reg or mri_surf2su

Re: [Freesurfer] surface based analysis and mask.mgh

2023-10-15 Thread Douglas N. Greve
By default, mri_glmfit will "prune" voxels. Ie, if it finds any subject that is zero at a given voxel, then that voxel is set to zero in the output and in the mask. I suggest you load up your data (lh.cbf.fsaverage.proj0.5sm00.nii.gz) as an overlay in freeview and scroll through the subjects lo

Re: [Freesurfer] mri_gtmpvc: ROI analisis no psf no rescale, negative or hight uptake.

2023-10-15 Thread Douglas N. Greve
On 9/27/2023 10:17 AM, Matteo Parodi wrote: External Email - Use Caution Sure I try, thank you for the replay. I'm using the above-mentioned analisis to obtain the Uptake for the region in Desikan atlas, but the results are strange. I think the error is in the last command but I'm

Re: [Freesurfer] MRIseg2TTypeMap() tissue type for seg 29 Left-undetermined not set

2023-10-15 Thread Douglas N. Greve
That is a bug in mri_compute_volume_fractions. That seg (29) has not been given a tissue type. Probably there are like 5 voxels in there with that label. In the short term, you can just replace it with another label, eg 2 for left white matter or 41 for right white matter. You can do this with

Re: [Freesurfer] Problem with tkregister2/tkregisterfv

2023-10-15 Thread Douglas N. Greve
Yes, we have depricated the TclTk stuff. You should not have gotten that error when using tkregisterfv. Can you send the command line and full terminal output? On 9/19/2023 7:02 PM, Nadvar, Negin wrote: External Email - Use Caution Good afternoon, I’m trying to run “tkregister2” in

Re: [Freesurfer] Longitudinal multimodal processing

2023-10-15 Thread Douglas N. Greve
yes, I think so too On 9/19/2023 5:07 PM, gabriel robert wrote: External Email - Use Caution Dear experts in longitudinal neuroimaging We carefully read the papers about possible biases introduced by treating timepoints images differently (Reuter and Fischl NI 2011, for example) to

Re: [Freesurfer] MANCOVA + Posthoc Testing Design Matrix Setup

2023-10-15 Thread Douglas N. Greve
In general, I would recommend treating sex as a categorical rather than continuous variable. To do this, you would have 6 groups (your 3 x 2 sex). I'm not sure what you are trying to test for. Eg, are you interested in the difference between groups regressing out the effects of age, DD, and sex

Re: [Freesurfer] Question about mri_nu_correct.mni

2023-10-15 Thread Douglas N. Greve
I doubt it. Have you tested it and found otherwise? On 6/14/2023 3:23 PM, ruifen...@gmail.com wrote: External Email - Use Caution Hi all, I am running Freesurfer 7.3.2 on T1 images (LPI orientation) with 176*256*256 FOV, 1mm isotropic resolution. I saw that the Ants N4 bias correct

Re: [Freesurfer] ERROR: could not configure recon-all parameters

2023-10-15 Thread fsbuild
External Email - Use Caution   Just FYI, it is not intended that you process your own subjects using SUBJECTS_DIR set to a path under where freesurfer is installed, i.e., SUBJECTS_DIR in the log is set to, setenv SUBJECTS_DIR /Applications/freesurfer/subjects/recon-all c