[Freesurfer] clarification regarding total GM and WM volume

2010-11-06 Thread Samantha Clark
Dear Freesurfer team, I was a little confused by the recent e-mails about total GM and WM. If you could help clarify the below mentioned, I would really appreciate it (am using freesurfer: stable 4 version). 1) For cortical thickness analysis, there is no necessity to normalize each parcellat

[Freesurfer] after mri_glmfit whats next

2010-05-09 Thread Samantha Clark
Hi Doug, I did the first level analysis for my DTI data per the tutorial mri_glmfit --y group-fa-tal.nii --mask group-mask-tal.nii\ --fsgd your.fsgd --C contrast --glmdir groupanadir Not sure how to proceed from here to view the regions that are statistically signifiant. Can you help? Tha

[Freesurfer] mkanalysis-sess

2010-02-23 Thread Samantha Clark
Hi, I have a question regarding creating a paradigm file and the command mkanalysis-sess. I am trying to analyze resting state data and wanted to know what the contents of the paradigm file should be. Also what would my mkanalysis-sess command be? Not sure what the -designtype and other opti

[Freesurfer] mris_anatomical_stats - how do output measures relate to each other ?

2009-11-28 Thread Samantha Clark
Hi All, I have a very basic question. Could you please point me to a publication or relevant material that describes the relationship of the various parameters that mris_anatomical_stats outputs. To be precise, I wanted to know how measures like thickness, volume, area, curvature are related. A

[Freesurfer] volume comparisons

2009-05-29 Thread Samantha Clark
Hi, I was wondering if there was a way to compare t1 or t2 maps between 2 subjects using the volume brain as opposed to the surface brain. To be specific I have two brains which are T1 maps. I want to see the differences in T1's between the two brains. How would i go about doing this. I hope i