Re: [Freesurfer] Voxel intensities and aseg edits

2017-01-26 Thread Bruce Fischl
Hi Tamara we don't use an intensity threshold as such. If you are looking for CSF, why not use our aseg and erode it once to avoid border voxels? Or twice if you want to be really certain. I'll leave (2) for one of our longitudinal processing experts. cheers Bruce On Thu, 26 Jan 2017, Tama

[Freesurfer] Voxel intensities and aseg edits

2017-01-26 Thread Tamara Tavares
Hello, I have two questions which I was hoping to get some help with. (1) I was wondering whether there was a intensity threshold for grey matter and CSF. I know that Freesurfer scales the intensity so white matter has an intensity of 110 (as can be seen at the bottom of Freeviewer when I open th