Hypoperfusion Intensity Ratio Less Than 0.4 is Associated with Favorable Outcomes in Unsuccessfully Reperfused Acute Ischemic Stroke with Large-Vessel Occlusion

^aFrom the Department of Radiology, Division of Neuroradiology (V.Y., H.A.S., J.M., H.L., L.L., F.D., N.Z.H.), Johns Hopkins Medical Center, Baltimore, Maryland
^bRenaissance School of Medicine at Stony Brook University (V.V.), Stony Brook, New York
^cDepartment of Radiology (J.F., G.B., C.H.), Neuroendovascular Program, University Medical Center Hamburg, Hamburg, Germany
^dDepartment of Radiology (P.S., T.D.F.), Neuroendovascular Program, University Medical Center Münster, Münster, Germany
^eDepartment of Interventional Neuroradiology (G.W.A., J.J.H.), Stanford Medical Center, Palo Alto, California
^fDepartment of Neuroradiology (H.A.S., M.W.), The University of Texas MD Anderson Center, Houston, Texas
^gDepartment of Radiology, Division of Neuroradiology (A.B., D.A.L.), West Virginia University, Morgantown, WV, USA

Please address correspondence to Vivek Yedavalli, MD, MS, Department of Radiology and Radiological Sciences, Johns Hopkins School of Medicine, Phipps B112-D, Baltimore, MD 21287; e-mail: Vyedava1{at}jhmi.edu; @vsyedavalli; @YedavaSNAPlab; @Hopkins_Rad; @hopkinsneurorad