Cerebrospinal Fluid Signal Intensity Increase on FLAIR MR Images in Patients under General Anesthesia: The Role of Supplemental O₂

Abstract

The paramagnetic effects of supplemental O2 administration result in shortened CSF T1. Radiologists should be aware of this phenomenon to avoid attributing increased CSF signal intensity on FLAIR images to abnormal CSF properties such as hemorrhage or elevated protein content.