Re: [Freesurfer] Mri_concat: initial frame ok but noisy in output image

2011-07-25 Thread Agnieszka Burzynska
cat (so > there's no real concatenation). Also, make sure that the bad subject in > the mri_concat output is the same subject that you are looking at > individually; you could be off by 1. > > doug > > Agnieszka Burzynska wrote: >> >> Dear experts, >> I used

[Freesurfer] Calculating ROI size from label, min ROI size

2009-09-11 Thread Agnieszka Burzynska
Dear all, I have 2 questions: 1) I created labels for some ROIs on fsavgerage (qdec analysis). I got statistics from these rois for each individual subject (by map-to-subjects, etc.), but what I am now interested in is to know the size of the ROI on the group level (so on the fsaverage surface).

[Freesurfer] Label sizes, min ROI size

2009-09-14 Thread Agnieszka Burzynska
Dear experts, I have 2 questions: 1) I created labels for some ROIs on fsavgerage (qdec analysis). I got statistics from these rois for each individual subject (by map-to-subjects, etc.), but what I am now interested in is to know the size of the ROI on the group level (so on the fsaverage surface

Re: [Freesurfer] Label sizes, min ROI size

2009-09-16 Thread Agnieszka Burzynska
ote: > > Try something like this > > mri_segstats --slabel fsaverage lh path/to/lh.yourlabel.label --sum > lh.yourlabel.sum > > The 4th column of the summary file will have the Area in mm^2 > > doug > > Agnieszka Burzynska wrote: >> Dear experts, >> I ha

[Freesurfer] FSL and freesurfer: combine runs in volume or on surface?

2010-01-19 Thread Agnieszka Burzynska
Dear all, I am trying to figure out how to bring my fMRI data from FSL to the freesurfer surface. The way I understood it from the tutorial "3.0 Surface-based Group Functional Analysis"( http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/FslGroupFeat) There are two possibilities of combining mu

[Freesurfer] average p-value from an ROI

2010-10-25 Thread Agnieszka Burzynska
Dear all, I have a follow-up question to the previous discussion ("correction for behavioral varialbles in qdec" Tue, 04 Aug 2009. Is there an option to extract the average p-value from a ROI? After a group analysis I specified ROIs at p < 0.001 and extracted the mean cortical thickness, the peak

Re: [Freesurfer] reg-feat2anat: a problem!

2011-02-07 Thread Agnieszka Burzynska
the same sign, then look through the > log file and find the flirt command. Run that command by itself (you may > need to run reg-feat2anat with --nocleanup to keep it from deleting the > files). If that fails, then contact the FSL people > > doug > > Agnieszka Burzynska wro

[Freesurfer] autorecon1 after Talairach correction: can I re-run other than with -notalairach?

2011-05-03 Thread Agnieszka Burzynska
Dear all, For one of my subjects I had to correct the Talairach step manually. My manual correction, however, may not be perfect. Is it possible to re-run autorecon1 using the Talairach correction to GUIDE (but not REPLACE) the automatic registration? Thank you! Aga _

Re: [Freesurfer] fMRI data from FSL into Freesurfer: is my workflow correct?

2011-05-10 Thread Agnieszka Burzynska
Dear Doug, Thank you a lot for your reply! Yes, I did use reg-feat2anat and registered example_func to the subject's anatomical. As far as I understand it, then the registration matrix can be used for a contrast of interest. That's great news that the software version will not be a problem. I wi

Re: [Freesurfer] fMRI data from FSL into Freesurfer: is my workflow correct?

2011-05-23 Thread Agnieszka Burzynska
Dear Doug, Thank you again very much for your help. I am replying with a delay because I was travelling. Please see my questions& comments below in the text: On 5/10/11 5:48 PM, "Douglas N Greve" wrote: > > > Agnieszka Burzynska wrote: >> Dear Doug, >

[Freesurfer] Viewing a multi-frame image?

2011-07-07 Thread Agnieszka Burzynska
Dear all, I created a 3-frame image using a command similar to: mris_preproc --target fsaverage --hemi lh --fwhm 5 \ --out xrun/lh.cope1.mgh \ --iv fbert1.feat/stats/cope1.nii.gz fbert1.feat/reg/freesurfer/anat2exf.register.dat \ --iv fbert2.feat/stats/cope1.nii.gz fbert2.feat/reg/freesurfer

Re: [Freesurfer] Viewing a multi-frame image?

2011-07-07 Thread Agnieszka Burzynska
Dear Doug, Yes, it works, thank you so much! Cheers, Aga On 7/7/11 3:57 PM, "Douglas N Greve" wrote: > Hi Aga, try View->Configure->Overlay. The config window will have a time > point entry at the top. > doug > > Agnieszka Burzynska wrote: >> Dear all,

[Freesurfer] DOF and smoothing in mri_glmfit

2011-07-07 Thread Agnieszka Burzynska
Dear all, I am combining 3 runs of a subject using fixed effects GLM and I wanted to make sure I am doing the right thing. For each subject I use: mri_glmfit --y 3runs/lh.cope1.mgh --yffxvar 3runs/lh.varcope1.mgh --ffxdof 126 --osgm --glmdir 3runs/lh.osgm.ffx --surf fsaverage lh --label $SUBJECT

Re: [Freesurfer] DOF and smoothing in mri_glmfit

2011-07-07 Thread Agnieszka Burzynska
than you should. At the group level, this is not such a big deal because > you're either not using the varcope or you are using it as a weight. > doug > > Agnieszka Burzynska wrote: >> Dear all, >> I am combining 3 runs of a subject using fixed effects GLM and I wante

[Freesurfer] Mri_glmfit ERROR: dimension inconsistency in source data

2011-07-08 Thread Agnieszka Burzynska
Hi, During running fixed effects glm to combine runs, the analysis of all but one subject went fine. The log file contains this error message: mri_surf2surf --srcsubject 1250 --srchemi lh --srcsurfreg sphere.reg --trgsubject fsaverage --trghemi lh --trgsurfreg sphere.reg --tval 3runs/tmp.mris_prep

[Freesurfer] reg-feat2anat: correct anat2exf.register.dat only or also func2std?

2011-07-13 Thread Agnieszka Burzynska
Dear experts, I am using reg-feat2anat to register my functional data from FSL to anatomical and starndard space in Freesurfer. For some subjects the registration is bad. I can easily fix anat2exf.register.dat. However, as specified in reg-feat2anat ‹help, I know that the registration failed as

Re: [Freesurfer] DOF and smoothing in mri_glmfit

2011-07-15 Thread Agnieszka Burzynska
our advice! Best, Aga On 7/7/11 5:14 PM, "Agnieszka Burzynska" wrote: > Thank you! I think I will just try it out: now run it as it is but also run > the 1st level with smoothing, as I need to add some contrasts anyway. Then I > should also know the difference between volume an

[Freesurfer] ERROR: dimension inconsistency in source data

2011-07-15 Thread Agnieszka Burzynska
Hi, I am sorry to re-post this problem, but I cannot find the source of my problem: During sampling the feat data to fsaverage using for example: mris_preproc --target fsaverage --hemi lh --out 3runs/lh.cope1.mgh --iv run1.feat/stats/cope1.nii run1.feat/reg/freesurfer/anat2exf.register.dat --iv