Abstract WP32: Heterogeneity of Oxygen Extraction Fraction Weighted MRI in Acute Ischemic Stroke Patients

Background: Increases in oxygen extraction fraction (OEF) are postulated to be a marker of tissue at risk of infarction in acute ischemic stroke patients. R2’, a parameter that can be measured rapidly using an asymmetric spin echo MRI sequence (ASE), can be considered an OEF-weighted MRI metric, being a combination of both OEF and venous cerebral blood volume. We investigated the feasibility and utility of OEF-weighted MRI in acute stroke....