Dear Freesurfer team, How does mris_preproc map volume data onto the surface when using the -iv option? Is an average between the white and pial boundaries taken, or are only the voxels taken into account that intersect with one of the two surfaces (and if yes, with which surface)? mris_preproc--iv volmeasfileSpecify full path to a volume file and its registration matrix file. The registration matrix file is of the type accepted/created by tkregister2. The volume is sampled to the surface, and the result is used as the input surface measure. This is an alternative to using --meas. This still requires that a subject list be supplied. Thanks again! Best, Silas
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