Hidoug,

Thanks doug.

For 1st question,I want to reduce the search space of vertex-wise analysis to a cluster.

For 2nd question, i try freeview as tksurfer cannot work. However this website cannot be logged in:http://surfer.nmr.mgh.harvard.edu/fswiki/FreeviewGuide/FreeviewTools/RoiEdit.

Thanks.

All the best.

Rujing Zha

2014-02-26

charujing123

发件人：Douglas Greve <greve@nmr.mgh.harvard.edu>

发送时间：2014-02-25 23:46

主题：Re: [Freesurfer] questions about ROI analysis

收件人："freesurfer"<freesurfer@nmr.mgh.harvard.edu>

抄送：

On 2/25/14 10:09 AM, Rujing Zha wrote:

Hi FS experts and others,
I have done two group thickness difference analysis based on whole brain. Now I want to do correlation analysis between specific ROI thickness and behavior score. I searched roi in the FS website, but I cannot distinguish the volume ROI and surface ROI very clearly. So I have some questions as below:

1,As I get some clusters in the two group t-test,I want to use one of these clusters to correlate thickness with behavior score. How to generate this mask and how to use this mask in the mri_glmfit and mri_glmfit-sim?

Do you mean you want to reduce the search space of a vertex-wise analysis to a cluster or that you want to compute the mean thickness within the cluster and correlate with your behavioral score?

2,If I want to draw ROI manually or set ROI according previous studies, how to create this ROI mask.

tksurfer can draw a label (as can freeview I think)

Any detailed information will be highly appreaciated.

Thanks.

All the best.

Rujing Zha
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