Gradation of Prolonged Venous Transit on Perfusion Imaging Highlights the Association of Deep Venous Drainage Impairment with Unfavorable Functional Outcome in Successfully Reperfused Anterior Circulation Large-Vessel-Occlusion Stroke. - Mei J; Salim HA; Lakhani DA; Balar A; Shahriari M; Liebeskind DS; Sriwastwa A; Guenego A; Dmytriw AA; Urrutia VC; Marsh EB; Lu H; et al. (AJNR. American journal of neuroradiology, 2026)