CBV

CBF

TMAX

There is a perfusion defect in the right parietal lobe with a wedge shaped area of elevated TMAX, diminished CBF, and relatively preserved CBV. This pattern would typically be expected with an infarct that has salvagable tissue and not much infarct core.

A

B

If you follow the right M2 branch seen on image A (red arrow, slice 365/510) and go superiorly, you will notice its cut off on image B (red arrow, slice 367-368/510). This matches nicely the location of the hyperdense M2 on the non-con head CT from Case 9a.

As a bonus, did you catch the incidental mass in the deep lobe of the left parotid gland? It turned out to be a Warthin tumor.