Hi Ignacio, you can use the function *cluster*, which given an input image, outputs various measures such as cluster sizes, etc. Cheers On Tue, Dec 29, 2009 at 2:36 PM, Ignacio Letelier <[log in to unmask]>wrote: > Hi everyone > > > I would like to know how can i get the activated volume of an specific ROI > ?? > > > Best regards > > > -- > Ignacio Letelier > > -- Reza Salimi-Khorshidi, D.Phil. Candidate, Dept. of Clinical Neurology, University of Oxford (Linacre College). [log in to unmask] FMRIB Centre, John Radcliffe Hospital, Headington, Oxford, OX3 9DU Tel: +44 (0) 1865 222466 Fax: +44 (0)1865 222717