Summary

High oxygen extraction fraction (OEF) is detectable by positron emission tomography (PET), and superficial temporal artery to middle cerebral artery (STA-MCA) bypass surgery can be used to improve cerebral hemodynamics in stroke risk patients [Zipfel et al. Skull Base 2005]. This article discusses some of the studies that have used PET to detect OEF, including the COSS Study, WASID Trial, SAMMPRIS Study.