CT
Axial (thin sections) non-contrast
Axial non-contrast
Coronal non-contrast
Sagittal non-contrast
Wedge-shaped hypoattenuation in the inferior aspect of the right cerebellar hemisphere with loss of grey-white matter differentiation, consistent with a PICA territory infarct. Dense vessel sign in the right vertebral artery at the foramen magnum. No tonsillar herniation or fourth ventricular effacement.