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FIG 4. 31-year-old man with ruptured giant aneurysm of the right MCA. A–E, T1-weighted SE image (A) (540/11/2) shows hematoma in right temporal lobe and insula with high signal from methemoglobin. It was shown to be due to rupture of fusiform giant aneurysm of right MCA by DSA (B). On 3D-TOF image (C) (40/6.9/1/20°), aneurysm lumen is indistinguishable from surrounding T1 contamination artifact. Contrast-enhanced 3D-TOF (D) (40/6.9/1/45°) faintly delineates aneurysm but remains severely degraded by T1 contamination artifact. Note that exiting vessel and M2 branches of right MCA, not seen by use of 3D-TOF (C), are, however, visualized. The dynamic contrast-enhanced MRA findings (E) (8.7/1.8/1/30°/3 mm), which is of low spatial resolution in this case, correlate well with those of DSA (B), showing only the aneurysm lumen, and not the hematoma
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