RT Journal Article SR Electronic T1 Preoperative Grading of Presumptive Low-Grade Astrocytomas on MR Imaging: Diagnostic Value of Minimum Apparent Diffusion Coefficient JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A1254 A1 E.J. Lee A1 S.K. Lee A1 R. Agid A1 J.M. Bae A1 A. Keller A1 K. terBrugge YR 2008 UL http://www.ajnr.org/content/early/2008/08/21/ajnr.A1254.abstract AB