Hi Flavio, > I´m SPM begginer. I´m trying to get corpus callosum segmentation. I´ve > already got the region segmentation using normalized image. Now, the > difficulty is to map the region into un-normalized image. Is there any > code that convert a normalize to un-normalize image? I thought that > 'spm_write_sn' function should be work, but I didn´t get success. How > could I get that? I would appreciate any suggetion. SPM5 was kindly designed with people like you in mind :) Now all you have to do is to segment your images (you probably want the images in native space so you can assess white matter only) and use a file called filename_seg_inv_sn.mat THis contains the mapping from normalized to unnormalized image and can be applied to your mask (write normalized). ou can search the spm archives at www.jiscmail.ac.uk/cgi-bin/webadmin?S1=spm for more information: this is always a good point to start :) Best, Marko -- ===================================================================== Marko Wilke (Dr.med./M.D.) [log in to unmask] Universitäts-Kinderklinik University Children's Hospital Abt. III (Neuropädiatrie) Dept. III (Pediatric neurology) Hoppe-Seyler-Str. 1, D - 72076 Tübingen Tel.: (+49) 07071 29-83416 Fax: (+49) 07071 29-5473 =====================================================================