Large area of cortical and deep white matter low density is observed in the right frontal lobe with effacement of the sulci in this region, appearances being typical of acute infarction. Extensive hyperdensity of the middle cerebral artery is consistent with thrombosis.
The large infarct is causing relatively mild mass effect with compression of the right lateral ventricle but no midline shift or compartment herniation. Basal subarachnoid cisterns are preserved.