Re: [Freesurfer] LME - contrast

2013-02-13 Thread Alex Hanganu
Hi Jorge, Thanks again for the detailed and very helpful explanation ! I thought that all statistics should better be performed with LME in order to give more credibility to final results. But also it brings more trust if in the article statistics are performed with the same method. Anyway -

Re: [Freesurfer] ROI analysis and whitening in fsfast - Percent activity change

2013-02-13 Thread Douglas N Greve
1). Yes 2) Right, pull the scale outside of the sqrt() doug On 02/13/2013 03:36 PM, Clark Fisher wrote: > Hi Doug, > > Thanks for the help, that seemed to worked great. I have a few > follow up questions about how to process the resulting statistics. > > I'm still using v4.5 (can't switch to

Re: [Freesurfer] Convert aseg.mgz to .nii and into MNI space with FSL dimensions

2013-02-13 Thread Douglas N Greve
you can use mni152reg to compute the registration to the MNI152 space. Make sure to spec the 1mm target. You can then use mri_label2vol to map aseg.mgz to the MNI152 space. doug On 02/13/2013 03:40 PM, Roderick McColl wrote: > Hello all, > I have a need to generate LH and RH WM masks for analy

Re: [Freesurfer] (no subject)

2013-02-13 Thread Bruce Fischl
Hi Rebecca you need to diagnose why it's happening. Is the underlying white matter intensity 110 or close? If it's significantly lower you could try adding control points there. cheers Bruce On Wed, 13 Feb 2013, Rebecca Rada wrote: > Hello, > > We are trying to figure out how to expand the pi

Re: [Freesurfer] "nu_estimate_np_and_em" error during recon-all

2013-02-13 Thread Nick Schmansky
Tudor, I dont have any other suggestions, other than to make sure, as i mentioned before, then you have free space on the disk that appears within Xubuntu. That is, from a terminal, when you type: df -h you should see that /dev/sda1 has about 2GB of space. the nu_correct tools will fail if ther

[Freesurfer] Convert aseg.mgz to .nii and into MNI space with FSL dimensions

2013-02-13 Thread Roderick McColl
Hello all, I have a need to generate LH and RH WM masks for analysis. I can convert aseg.mgz to aseg.nii but the dims are 256x256x256 and I need to use the FSL MNI format which is 182x218x182. Is there a recipe for cropping / translating etc to match the aseg.mgz atlas with the FSL atlases? Tha

Re: [Freesurfer] ROI analysis and whitening in fsfast - Percent activity change

2013-02-13 Thread Clark Fisher
Hi Doug, Thanks for the help, that seemed to worked great. I have a few follow up questions about how to process the resulting statistics. I'm still using v4.5 (can't switch to v5 yet), as I mentioned, and would like to get the % signal change for certain contrasts with error bars. Looking

[Freesurfer] (no subject)

2013-02-13 Thread Rebecca Rada
Hello, We are trying to figure out how to expand the pial surface after FreeSurfer processing has occured. The processed brainmask.mgz has defined the gray matter as red, but the pial surface does not extend out to the red gray matter on a portion of the temporal lobe. Is there a way to expand

[Freesurfer] longitudinal processing of one timepoint

2013-02-13 Thread Luigi Angelo Maglanoc
Dear FreeSurfer experts, I know that it is possible to submit data with only one timepoint into the longitudinal stream with FreeSurfer 5.2. My question is, what is the exact command? is it: 1) recon-all -base -tp -all or 2) recon-all -base -tp -tp -allI have accidently run them with the