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Dear Freesurfer Expert,

 

We would like to extract mean Cth values for each subject within a own-creaded ROI (surface defined), using freeview (for instance). Is it possible to create a ROI (i.e. spherical surface) surrounding a particular vertex of an sig.mgh file? (and then extract its mean Cth values for each subject)?

 

I think this is not a new question, and it was posted somehow on MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/QuestionAnswers, and MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg67677.html, but I’m still encountering questions.

 

These commands did run, but together they didn’t create a binarized mask with 1 for the sphere around the coordinates, and 0 for the other voxels. Would you recommend what I should change? Thank you so much!

 

$mri_volsynth --template $SUBJECTS_DIR/fsaverage/surf/lh.thickness --pdf sphere --sphere-center -7.4 67.22 60.27 --radius 5 --o delta.sm00.mgh

$mris_fwhm \

--smooth-only \

--subject fsaverage \

--hemi lh \

--i delta.sm00.mgh \

--niters 10 \

--o delta.sm10.mgh

$mri_binarize --i delta.sm10.mgh --min 10e-5 --o delta.sm10.bin.mgh

 

 

Regards,

Xiaoxu

 

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