Re: [Freesurfer] WM edit, remove GM bright rim

2016-03-18 Thread Min Liu
Dear Bruce, Many thanks for looking into this. I tried to post orig.mgz to the mailing list yesterday but the email didn't get through because the file size exceeds 1000KB. So I screen-captured two images to showcase the overall quality of T1 and where the problem is. Although the bright rim doe

[Freesurfer] small numbers of extracted pial surface area‏

2016-03-18 Thread Karl Liu
Dear Freesurfer experts, I am reposting my question from early this week since it is not answered. Any help much appreciated. My question is about the measure of pial surface area. Following a group comparison and correction in QDEC, I found a significant cluster (size: 760mm^2) when choo

Re: [Freesurfer] FreeSurfer 6.0

2016-03-18 Thread Alan Francis
Thanks for that. On Wed, Mar 16, 2016 at 11:37 AM, Bruce Fischl wrote: > that's a good point > On Wed, 16 Mar 2016, Martin Reuter wrote: > > > > > Although it should be mentioned that outputs (even of subfields) are > > going to change due to differences in the regular freesurfer processing, > >

Re: [Freesurfer] WM edit, remove GM bright rim

2016-03-18 Thread Min Liu
Dear Bruce, Thank you very much for your reply. I think we will discard these subjects for the analyses. Thanks, Min On Thu, Mar 17, 2016 at 9:53 AM, Bruce Fischl wrote: > Hi Min > > unfortunately there's not much we can do as these artifacts make the gray > matter look just like white matter.

[Freesurfer] Smoothing at FWHM (Qdec)

2016-03-18 Thread Martin Juneja
Hello everyone, I am very new to FreeSurfer. Although I know what smoothing means etc. but I am not sure what smoothing level is the best to choose while comparing cortical thinning for patients vs. controls. Qdec gives several options to choose from among 0, 5, 10, 15, 20 and 25. Literature says

[Freesurfer] mri_robust_register question

2016-03-18 Thread Ji Won Bang
Dear. All. Hi. How are you? It might be a very naive question, but your advice is greatly appreciated! I'm trying to register 2 T1s obtained from 1 subject on different days and then register the functional scans to their corresponding T1s (registering the functional scans to the same day's T1).

Re: [Freesurfer] Anterior to Posterior Length

2016-03-18 Thread Heather Acuff
Hi Bruce, I'm asking for the length of the entire hemisphere. Thank you! Heather On Wed, Mar 16, 2016 at 11:19 AM, Bruce Fischl wrote: > Hi Heather > > the anterior/posterior length of each tract you mean? Or the length of the > entire hemi? > Bruce > > On Wed, 16 Mar 2016, Heather Acuff wrote

Re: [Freesurfer] tksurfer

2016-03-18 Thread Douglas Greve
Why do you say something is wrong? It is a big cluster and probably not very useful. Is that what you mean? If so, then increase the threshold. On 3/16/16 10:44 AM, John Anderson wrote: Thank you doug, Please what do you suggesst me to do? Is this related to something wrong in the analysis? Bes

Re: [Freesurfer] Reg: Correcting Defect error

2016-03-18 Thread Bruce Fischl
Hi Jesu you could upload the subject, but it is almost certainly the case that you have some huge defect that represents a big error, like the skull or cerebellum being attached to the surface. Look at the ?h.inflated.nofix or ?h.orig.nofix to see what is going on. If you can't figure it out f