Fig 4. A 79-year-old man with normal renal function evaluated for a transient ischemic attack. A, Precontrast axial FLAIR image shows no abnormal signal intensity in the SAS. B, Forty-eight hours postgadolinium injection, repeat MR imaging shows diffuse increased signal intensity in the subarachnoid space (SAS) on coronal FLAIR images due to delayed clearance of the gadolinium chelate. C, Repeat MR imaging 72 hours postgadolinium injection shows resolution of the increased signal intensity in the SAS.