Try the MarsBar toolbox: http://marsbar.sourceforge.net/ Best regards, Jonathan 2009/3/12 Zdena Op de Macks <[log in to unmask]>: > I'm interested in calculating the grey matter volume (e.g., average voxel > intensity) of certain ROIs (single-subject analysis). > > How can I do this in SPM5? > > -- > Zdeňa A. Op de Macks >