[Freesurfer] mri_surf2vol -lost cluster

2019-09-27 Thread Albrecht, Daniel S.
Hello everyone, I've been using mri_vol2surf to move some activation data in MNI space to the fsaverage surface with the following command: mri_vol2surf --mov MNIvol.nii --projfrac-max 0 1 0.1 --hemi rh --o rh.out.mgz --mni152reg This works well, but I'm losing a small temporal gyrus cluster

[Freesurfer] mri_gtmpvc with amended aparc+aseg

2019-06-11 Thread Albrecht, Daniel S.
Hello, I’ve been using PETSurfer for partial volume correction of PET images using the RBV option. I’m amending the parcellations/segmentations to add in extracortical areas of high PET signal (to prevent spill-in into the brain), and after adjusting the *ctab file this runs successfully.

Re: [Freesurfer] Extraction of cortical thickness in native space

2018-02-28 Thread Albrecht, Daniel S.
Thanks, Doug! I think we were probably going about this the wrong way. If I transform the ROI from MNI space back into native space, will the following commands give the proper cortical thickness extraction from native space? mri_vol2surf --mov roi_in_native_space.nii.gz --out

[Freesurfer] Extraction of cortical thickness in native space

2018-02-21 Thread Albrecht, Daniel S.
Hello, We are attempting to extract cortical thickness values from a pre-defined ROI in MNI space. Originally, we had followed the instructions detailed here: https://surfer.nmr.mgh.harvard.edu/fswiki/VolumeRoiCorticalThickness for extraction in MNI space, but now wanted to extract

[Freesurfer] Automated extraction of dural/meningeal ROI?

2017-03-06 Thread Albrecht, Daniel S.
Hello, We have a PET dataset where we expect to see pathogenic changes in the meninges. We'd like to extract the meningeal signal in subject space, and were hoping to come up with an automated strategy to create meningeal ROIs, containing no brain or scalp. So my question is: can you suggest

[Freesurfer] Spmregister issues

2016-09-08 Thread Albrecht, Daniel S.
Hello, I've been using spmregister in order to coregister a static PET image to an MPRAGE, typically with good results. A representative run is as follows: spmregister --mov $file.nii --s $subj --reg SUV_lin_T1.dat --fsvol orig We then convert *.dat to *.mat with tkregister2, and apply the

[Freesurfer] Using FSL commands through Matlab (Linux)

2015-08-04 Thread Albrecht, Daniel S.
Hello, Sorry if this isn’t the right forum for the question, but not sure where to direct it. I’m trying to incorporate some FSL commands into a Matlab script. I’m using a Linux machine and running Matlab 7.11.0 (2010b). I tried to access the FSL toolbox through Matlab using:

[Freesurfer] Freeview question: using line profile

2015-01-14 Thread Albrecht, Daniel S.
Hello, I'm having trouble using the line profile tool in FreeView. I have a PET image overlaid on an MR image, and would like to view a line profile of a rectangular ROI on the PET image. I assumed that the line profile selection in Tools would be able to do this, but I haven't been able to

Re: [Freesurfer] Freeview question: using line profile

2015-01-14 Thread Albrecht, Daniel S.
, Albrecht, Daniel S. wrote: Hello, I'm having trouble using the line profile tool in FreeView. I have a PET image overlaid on an MR image, and would like to view a line profile of a rectangular ROI on the PET image. I assumed that the line profile selection in Tools would be able to do