Uuurgh. This is a new, unfinished option - sorry, I didn't realise it was out there yet. To do what you want is easy using the "cluster" program, which can output an image of cluster sizes, which you can then easily threshold. Cheers, Steve. On 11 Jun 2007, at 00:44, Luetcke, Henry wrote: > Hello all, > > > > what is the exact meaning of the input arguments height_power and > size_power for the cluster option in avwmaths++? Would it be > possible to threshold based on the number of connected voxels in a > cluster with this option? > > > > Thanks a lot, > > > > Henry > > > > > > Henry Lütcke > > Biomedizinische NMR Forschungs GmbH > > am Max-Planck Institut für Biophysikalische Chemie > > > > Am Fassberg 11 > > 37077 Göttingen > > Germany > > > > Phone: +49-(0)551-201 1735 > > Mobile: +49-(0)176-20808069 > > > > Mail: [log in to unmask] > > > > > > > > ------------------------------------------------------------------------ --- Stephen M. Smith, Professor of Biomedical Engineering Associate Director, Oxford University FMRIB Centre FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 222726 (fax 222717) [log in to unmask] http://www.fmrib.ox.ac.uk/~steve ------------------------------------------------------------------------ ---