Re: [Freesurfer] GM and WM intensity thresholds (Manual Edits)

2018-11-27 Thread Bruce Fischl
Hi David 1. I think the main function of the 3T flag is to align to an Talairach average of 3T data, so probably you should continue to use it. 2. There really is no hard threshold. For the control points you want to use voxels that are entirely wm , no partial voluming and no pathology. 3.

[Freesurfer] GM and WM intensity thresholds (Manual Edits)

2018-11-27 Thread David S Lee
External Email - Use Caution Hello FreeSurfer Experts! I currently supply inhomogeneity-corrected (via N4 biascorrection) 3T T1w scans through recon-all pipeline. The correction has solved many segmentation errors which reduced the time spent on manual editing. I have several ques