I am having trouble extracting the brain from proton density and t2 weighted images. Any suggestions? Stefano Marenco, M.D. Senior Staff Fellow, NIMH, CBDB Bldg 10 room 4S235 9000 Rockville PIke Bethesda, MD 20892 email: [log in to unmask] tel: (301) 435-8964 fax: (301) 4807795