Re: [Freesurfer] Cortical gray matter surface area

2014-09-14 Thread will brown
Thanks Doug, Just to double check I understand you correctly, where the output says # Measure Cortex, WhiteSurfArea, White Surface Total Area this is now the surface area of the pial surface even though it is labeled White? Cheers, Will On Sat, Sep 13, 2014 at 3:27 AM, Douglas N Greve

[Freesurfer] fsfast: using an empirically derived HRF with mkanalysis-sess

2014-09-14 Thread Alex Kell
hi freesurfers, i would like to use an empirically derived HRF with mkanalysis-sess. i have derived the HRF i want [via an FIR model], but it's not obvious how i can use my custom HRF with mkanalysis-sess. one option, it seems, is to feed in my own regressors with the -taskreg flag and then not

Re: [Freesurfer] fsfast: using an empirically derived HRF with mkanalysis-sess

2014-09-14 Thread Alex Kell
and one point of clarification: i only care about beta weights for each condition of interest, so i don't care that -taskreg would only run an F-test for significance maps and wouldn't give me t maps for each regressor of interest. thanks again, alex On Sun, Sep 14, 2014 at 1:55 PM, Alex Kell

Re: [Freesurfer] fsfast: using an empirically derived HRF with mkanalysis-sess

2014-09-14 Thread Douglas Greve
On 9/14/14 1:55 PM, Alex Kell wrote: hi freesurfers, i would like to use an empirically derived HRF with mkanalysis-sess. i have derived the HRF i want [via an FIR model], but it's not obvious how i can use my custom HRF with mkanalysis-sess. one option, it seems, is to feed in my own

Re: [Freesurfer] possible to use freesurfer segmentations to get mean values for anatomic structures from other sequences

2014-09-14 Thread Douglas Greve
yep, you can use it for anything. doug On 9/14/14 12:52 PM, Salil Soman wrote: Dear Doug, Thank you again for this email. Do you think it is possible to use this method for ASL images as well? If so, how would you change the options? Best wishes, Salil Soman, MD, MS On Sat, May 25, 2013

[Freesurfer] sMRI using Freesurfer 5.1 followed by DTI using Freesufer 5.3

2014-09-14 Thread prasser
Hi, Could you please let me know if it's okay to use subjects analyzed using Freesurfer 5.1 (os x 10.6) for DTI analysis using Freesurfer 5.3 (os x 10.8)? Thanks. ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu

Re: [Freesurfer] possible to use freesurfer segmentations to get mean values for anatomic structures from other sequences

2014-09-14 Thread Salil Soman
Thank you Doug. I am having trouble with extracting statistics using this method. I am able to use bbregister to get a transformation that registers the PD image of the ASL to the T1. I then used this transformation matrix to register the CBF map for the ASL study into the T1.mgz space. Checking