RT Journal Article SR Electronic T1 CT in brain density determination. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 374 OP 376 VO 2 IS 4 A1 Zatz, L M YR 1981 UL http://www.ajnr.org/content/2/4/374.abstract AB