FIG 1. Case 1: 61-year-old woman who had imaging 48 hours after the onset of symptoms.

A, T2-weighted MR image shows a high intensity area (arrow) in the right occipital region.

B, The ADC map shows an abnormal occipital lesion (arrowheads), which is much larger than that seen on initial T2-weighted image (A) and follow-up CT scan (E).

C, The rMTT map also shows an abnormal occipital lesion (arrowheads), which is larger than that seen on initial T2-weighted image (A) and follow-up CT scan (E).

D, The rCBV map shows an abnormal occipital lesion (arrow), which is a little larger than that seen on T2-weighted image (A) but almost the same size as that on follow-up CT scan (E).

E, Follow-up CT scan 11 months later shows infarction (arrow) in the right occipital region.