Dear SPMers, We have acquired SPGR images in bruker format and coverted to analyze using pvconv.pl perl script by Matthew Brett. When i display the converted image in SPM it looks absolutely fine. But when i try to extract the 3D brain surface using render - xtract brain ... i get the following error. SPM2: spm_surf (v2.3) 17:10:24 - 02/12/2004 ======================================================================= ??? Error using ==> * Inner matrix dimensions must agree. Error in ==> C:\MATLAB6p5\toolbox\spm2\spm_surf.m (do_it) On line 106 ==> vertices = (Mat*[vertices' ; ones(1,size(vertices,1))])'; Error in ==> C:\MATLAB6p5\toolbox\spm2\spm_surf.m On line 53 ==> do_it(P,mode); Error in ==> C:\MATLAB6p5\toolbox\spm2\spm.m On line 1276 ==> evalin('base',CBs{v-1}) ??? Error while evaluating uicontrol Callback. Any insights is greatly appreciated Thanks -Krishna ===== Krishna P. Miyapuram Work : Graduate Student, Dept of Anatomy, Univ of Cambridge Home : 25, Parkside, Room 10 (Phone +44 - 1223 - 476858 Address : Downing College, Regent Street, Cambridge, CB21DQ, England URL : http://people.pwf.cam.ac.uk/kpm23/index.html __________________________________ Do you Yahoo!? Meet the all-new My Yahoo! - Try it today! http://my.yahoo.com