We have an ROI for V1 of each of 10 subjects that we have transformed onto the surface of fsaverage with mri_surf2vol. Now we would like to sum these binary masks to produce a single mask with values from 0 to 10 corresponding to the overlap of the individual masks on the average surface. 

Is there a way to do this with freesurfer tools or do we need to invoke fslmaths from the FSL tools?

Thanks,
Holly

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Dr Holly Bridge


Royal Society University Research Fellow        

FMRIB Centre                            Tel: +44-1865-222582

John Radcliffe Hospital

Headington

Oxford OX3 9DU            Email: hb@fmrib.ox.ac.uk


Lecturer and JRF, New College

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