[Freesurfer] Subcortical under segmentations

2025-01-30 Thread Jeong Yeon Kang
External Email - Use Caution Hello FreeSurfer Developers, I am attempting to run recon-all on a group of nifti T1’s (parameters listed below). All the T1’s look good (no noticeable artifacts) and the cortical parcellations work well, and log files say completed without error. Howe

[Freesurfer] Automated extraction of dural/meningeal ROI

2025-01-30 Thread Sneha Pandya
External Email - Use Caution Dear Doug, We are working on PET images and our tracer has a lot of non-specific binding close to meninges. To do so we want to be able to mask out meninges and other areas outside the brain. Following up on your suggestion as in https://secure-web.

Re: [Freesurfer] Issue with Right Hemisphere Segmentation/Parcellation

2025-01-30 Thread Douglas N. Greve
It is likely due to the slice thickness. recon-all was build with the assumption that the data would be high res (~1mm). It becomes hard to resolve cortex at lower resolutions, so, while recon-all-clinical will finish and give you results, there is no way to get around the resolution limits.

Re: [Freesurfer] Corpus Callosum Missing in SAMSEG Output

2025-01-30 Thread Douglas N. Greve
samseg does not have a CC seg. You can get the CC with something like mri_cc -aseg samseg/seg.mgz  -o samseg/seg+cc.mgz -lta samseg/cc_up.lta you can ignore the lta output On 1/28/2025 7:00 PM, Taghizadeh Mortezaei, Nima wrote: Dear FreeSurfer Support Team, I am using FreeSurfer version 7.4.1