Thrombectomy for Stroke at 6 to 16 Hours with Selection by Perfusion Imaging. Categories: Magnetic Resonance Imaging (MRI) Author: Albers GW, Ansari SA, Bammer R, Broderick JP, Carrozzella J, Christensen S, DEFUSE 3 Investigators, Demchuk AM, Hamilton S, Heit JJ, Kasner SE, Kemp S, Kim S, Kim-Tenser M, Lansberg MG, Lavori PW, Leslie-Mazwi T, Marks MP, McTaggart RA, Mlynash M, Ortega-Gutierrez S, Palesch YY, Sarraj A, Torbey MT, Tsai JP, Yeatts SD, Zaharchuk G