TY - JOUR T1 - Proper Masking to Show the True Activation JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 247 LP - 249 VL - 27 IS - 2 AU - Todd Parrish Y1 - 2006/02/01 UR - http://www.ajnr.org/content/27/2/247.abstract N2 - ER -