Legend T2, FLAIR and T1W MRI reveals absent normal flow void in the basilar artery. There is increased signal in the basilar artery on the FLAIR sequence.

Legend Time-of-flight MRA shows no flow in the basilar artery. CT demonstrates increased attenuation within the basilar artery. DWI shows no evidence of restricted diffusion.

Legend Hemodynamic time-signal intensity curves from the left and right basal ganglia and the pons. There is a qualitative delay in the maximum T2* effect (time to minimum) in the pons.

Legend Decreased CBV (cerebral blood volume), increased MTT (mean transit time), and decreased CBF (cerebral blood flow) in the cerebellum and brainstem compared to the cerebral hemispheres.

Legend On day 3, FLAIR image reveals abnormal hyperintensity in the midbrain. DWI shows restricted diffusion in the left pons and middle cerebellar peduncle, and ADC map shows corresponding decreased ADC in the pons. Key words: mri perfusion vascular mra

Brain Diagnosis: Thrombosis of basilar artery Brain stem infarction