Hello Freesurfer group,

 

I am using the command ‘mris_spherical_average’ to map and average a series of label files onto fsaverage (I have created the label files manually by drawing directly on subject surfaces in FreeView). This has allowed me to create a surface probability map, where each vertex on the FreeSurfer fsaverage surface is represented from 0% to 100% as belonging to my sulcus of interest (see screenshot ‘.label’).

 

I would like to blur the data and load this blurred average as an overlay onto the fsaverage pial. However, when I run ‘mri_label2vol’ followed by ‘mris_fwhm’, I lose the probability map and the average label is turned into one large label (see screenshot ‘overlay’, where most of the map has 99% overlap).

 

Would there be a way to blur this averaged label (obtained from mris_spherical_average) with a similar command to ‘mris_fwhm’ but for label files?

 

Let me know if you have any questions regarding the procedure. Very much looking forward to your response and thank you for all your time!

 

Best,

Kristi 

 

 

                                                                

Kristi Drudik 

Montreal Neurological Institute 

McGill University 

Montreal, Canada