RT Journal Article SR Electronic T1 Optimal use of MR contrast agents: how much is enough? JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 881 OP 883 VO 12 IS 5 A1 Maravilla, K R YR 1991 UL http://www.ajnr.org/content/12/5/881.abstract AB