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FIG 1. 48-year-old woman with an aneurysm of the right middle cerebral artery trifurcation treated by GDCs.
A, Before treatment, diffusion-weighted images (2825/92.6/1) appear normal.
B–D, Two hours after embolization, FLAIR images (10002/148/2200/1) (B) show a slight right frontobasal hyperintense signal (arrows). Diffusion-weighted images (2825/92.6/1) (C) show a small right basal hyperintense lesion, caused by a recent ischemic event (arrows). On ADC maps (D), ADC values are decreased relative to contralateral hemisphere and displayed as an area of dark signal (arrowhead).
E–G, Twenty-four hours after embolization, the contrast of the lesion (arrows) has increased on FLAIR (10002/148/2200/1) (E) and diffusion-weighted (F) (2825/92.6/1) images, confirming the ischemic lesion. Values on ADC maps (G) are further decreased in the right frontobasal ischemic lesion (arrowheads).
H, Follow-up FLAIR images at 3 months (10002/148/2200/1) show a very small residual frontobasal hyperintense lesion (arrows).
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