Axial T2WI's of the brain show hyperintense lesions in the left thalamus and
left occipital lobe. There is no flow void in the basilar artery. Slight asymmetry
of the cerebral peduncles and mild parenchymal volume loss are noted.
Axial FLAIR images show similar findings. The signal abnormality in the left occipital
lobe has a gyriform pattern. Also seen are non-specific deep white matter changes.
Left: axial T1WI discloses subtle hypointensity and mass effect in the left occipital lobe,
with compression of the cortical sulci and the atrium of the left lateral ventricle.
The basilar arterial flow void is absent.
Lower middle: MR angiography lateral projection shows portions of the vertebral arteries
and posterior inferior cerebellar arteries. However, the basilar artery is not visualized.
Right top and bottom: Collapse and anterior MIP images of the MRA show absence of
the basilar artery and left posterior cerebral artery. The right posterior cerebral artery
gets some supply from the right posterior communicating artery.
Key words: mri mra stroke vascular
Infarcts in left occipital lobe & thalamus
with severe basilar disease