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FIG 2. Images of the posterior fossa in a patient with suspected metastatic disease. A, Two-dimensional T1-weighted SE image shows marked pulsation artifacts. Superimposition of the choroidal plexus in the fourth ventricle and the artifacts mimic a possible contrast-enhancing lesion (arrow). B, MP RAGE 5-mm reformation shows considerable ghost artifacts (arrows) impairing visualization of the pons and the cerebellum. C, VIBE 5-mm reformation shows no artifact.
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