[Freesurfer] QDEC question

2015-07-17 Thread Dr Sampada Sinha
Dear freesurfer experts, I am trying to do cortical thickness-age correlation in Spinocerebellar ataxia patients (SCA1 and SCA2). ## I successfully ran qcache command on these 10 subjects of SCA1 and SCA2. ##Since my discrete factors are *Gender *(Male and Female) and* Diagnosis* (SCA1 and SCA2),

[Freesurfer] make_average_subject for subcortical volumes in children

2015-07-17 Thread Kristi Griffiths
Dear FS experts, I am new to freesurfer and have a few basic questions. I have a sample of 8-17 year olds in which I will be looking at both cortical thickness and subcortical volumes. I understand that the surface-based registrations seem to be fine for this age range (as per Ghosh et al,

Re: [Freesurfer] QA measures

2015-07-17 Thread Jacek Manko
You may find this paper useful: http://www.biomedcentral.com/1471-2342/12/27 Authors describe there some measures such as Euler number and #8220;Contrast to Noise ratio (CNR). Actually, they dont belong to QA package, but they are definitely worth looking at. Best, Jacek Manko Dnia

Re: [Freesurfer] help with using optseq2

2015-07-17 Thread MCLAREN, Donald
This type of design is not suitable for optseq2. Furthermore, you only have 100s of task and almost 300s of scan time. This will lead to lots of empty space. You really need more than 2 conditions per event type. Best Regards, Donald McLaren = D.G. McLaren, Ph.D. Research Fellow,

Re: [Freesurfer] Regarding post contrast T1 MPRAGE (Gadolinium)

2015-07-17 Thread C. Paula de los Angeles
Are there any flags that are helpful to add when dealing with these images with gadolinium? On Wed, May 13, 2015 at 8:38 AM, Bruce Fischl fis...@nmr.mgh.harvard.edu wrote: the gad will make the dura more likely to be segmented as wm and might require more manual interventions, but if you are

[Freesurfer] Multimodal Extraction of Freesurfer ROI Intensity Values

2015-07-17 Thread Lakhani, Bimal
Hello, To this point, I have been able to successfully register Myelin Water Fraction (MWF) scans to Freesurfer Base Space in the longitudinal pipeline (thank you for the help with that!). What I would like to do next is use Freesurfer ROIs to automatically extract the mean intensity of the

[Freesurfer] bad registration using mri_vol2vol

2015-07-17 Thread Barbour, Tracy,M.D.
Hello, I'm trying to convert an ROI mask I created in MNI305 space to MNI152. After running MRI_vol2vol the registration looks off (too anterior). Here are my commands: mri_convert -ot nii lh.amyg.faceaw_func.anatconstr.p05.5.3CRFH.n70.mgz lh.amyg.faceaw_func.anatconstr.p05.5.3CRFH.n70.nii