 Brain MRI:A punctate focus of susceptibility weighted artifact is again seen in the posterior right putamen without blooming artifact. The ventricles and sulci are normal in size. The cerebellar tonsils are in normal position. There are no masses, mass effect or midline shift. The pituitary gland is normal in size. No diffusion-weighted abnormalities are identified. There are no extraaxial fluid collections or subdural hematomas. Flow voids are present within the major vessels indicating patency. The paranasal sinuses and mastoid air cells are clear. Brain MRA:There is antegrade flow within the distal bilateral vertebral arteries, within the basilar artery, distal bilateral internal carotid arteries and carotid siphons and bilateral anterior, middle and posterior cerebral arteries. The circle of Willis is intact without arterial stenoses, occlusions or aneurysms. The right vertebral artery is hypoplastic with a dominant left vertebral artery, a normal variation. No arteriovenous malformations are identified and there is no evidence for cerebral vasculitis.
1.Stable focus of susceptibility artifact in the right putamen of questionable clinical significance. This is likely a focus of microhemmorhage, calcification, or very small cavernoma.2.No significant abnormality of the intracranial arteries.