RT Journal Article SR Electronic T1 Proton MR spectroscopy and the ring-enhancing lesion. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 589 OP 590 VO 19 IS 3 A1 B C Bowen YR 1998 UL http://www.ajnr.org/content/19/3/589.abstract AB