Re: [Freesurfer] Question about pial surface correction through Freesurfer

2015-07-24 Thread Bruce Fischl
p.s. although in this case I think it won't hurt to always pass that parameter since it is only used for the flair/pial stuff On Fri, 24 Jul 2015, Antonin Skoch wrote: > Dear Kalyan, > > do you use standard pial surface reconstruction via T1 images, or optional > pial > surface refinement with

Re: [Freesurfer] Question about pial surface correction through Freesurfer

2015-07-24 Thread Bruce Fischl
Hi Antonin that's a good point and something we probably need to fix. Bruce On Fri, 24 Jul 2015, Antonin Skoch wrote: > Dear Kalyan, > > do you use standard pial surface reconstruction via T1 images, or optional > pial > surface refinement with T2/FLAIR images? > > I had similar problems wit

Re: [Freesurfer] Question about pial surface correction through Freesurfer

2015-07-24 Thread Antonin Skoch
Dear Kalyan, do you use standard pial surface reconstruction via T1 images, or optional pial surface refinement with T2/FLAIR images? I had similar problems with FLAIRpial surface refinement. The corrected pial surface appeared jagged and some areas were artificially cut out (whereas they were

Re: [Freesurfer] Question about pial surface correction through Freesurfer

2015-07-23 Thread Bruce Fischl
8:26 AM To: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] Question about pial surface correction through Freesurfer   Hello Kalyan, A few questions: -Is this an error you see frequently in your scans, or just a one-off type of error? -Is it always in the same places anatomically? -Did you ma

Re: [Freesurfer] Question about pial surface correction through Freesurfer

2015-07-23 Thread Tripathy, Kalyan
le then to combine corrected pial surfaces with the original WM surfaces? Thank you, Kalyan   From: freesurfer-boun...@nmr.mgh.harvard.edu on behalf of Ani Varjabedian Sent: Thursday, July 23, 2015 8:26 AM To: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] Question about pi

Re: [Freesurfer] Question about pial surface correction through Freesurfer

2015-07-23 Thread Ani Varjabedian
Hello Kalyan, A few questions: -Is this an error you see frequently in your scans, or just a one-off type of error? -Is it always in the same places anatomically? -Did you make sure to put the control points in areas that were 100% white matter, and that had intensity values < 110 ? If you

[Freesurfer] Question about pial surface correction through Freesurfer

2015-07-21 Thread Tripathy, Kalyan
Hi, I am trying to manually correct some segmentation errors through Freesurfer. In particular, I have noticed a number of areas where the pial surface appears to miscalculated and is excluding chunks of grey matter. I tried using control points to push the pial surface out, and this helped