The CT perfusion demonstrates hyperperfusion localized to the right temporal and parietal lobes, which correspond with the patient's symptoms. It was presumed that the first seizure was not witnessed with only the left hemiparesis evident. 

The main differential diagnosis is that of luxury perfusion in subacute ischemic infarct, however, there are no changes of established infarct on the non-contrast CT brain, no large vessel thrombus on the CTA and CT perfusion in luxury perfusion shows prolonged MTT/Tmax. Also, a follow-up MRI (not shown) did not demonstrate any evidence of infarct.