RT Journal Article SR Electronic T1 Proper Masking to Show the True Activation JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 247 OP 249 VO 27 IS 2 A1 Todd Parrish YR 2006 UL http://www.ajnr.org/content/27/2/247.abstract AB