RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E58 OP E59 DO 10.3174/ajnr.A7160 VO 42 IS 8 A1 Amans, M.R. A1 Copelan, A.Z. A1 Smith, E. A1 Drocton, G.T. A1 Narsinh, K.H. A1 Murph, D. A1 Khangura, R.S. A1 Hartley, Z.J. A1 Abla, A.A. A1 Dowd, C.F. A1 Higashida, R.T. A1 Halbach, V.V. A1 Hetts, S.W. A1 Cooke, D.L. A1 Nelson, J. A1 Mccoy, D. A1 Ciano, M. A1 Dillon, W.P. YR 2021 UL http://www.ajnr.org/content/42/8/E58.abstract AB