The “white gray sign.” Axial high-resolution 3D inversion recovery fast-spoiled gradient-echo T1-weighted image demonstrates decreased gray-white contrast of the anterior and posterior cortices along the central sulcus (white arrow). The “white gray sign.” Axial high-resolution 3D inversion recovery fast-spoiled gradient-echo T1-weighted image demonstrates decreased gray-white contrast of the anterior and posterior cortices along the central sulcus (white arrow). O.F. Kaneko et al. AJNR Am J Neuroradiol 2017;38:276-280 ©2017 by American Society of Neuroradiology