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FIG 3. Anaplastic astrocytoma after surgery and radio/chemotherapy in a 32-year-old woman.
A and B, Multiple small hemorrhagic lesions (large arrows) are detected on the GRE (A) and GRE-EPI (B) images.The GRE image is more sensitive to the cortical and subcortical lesions (arrowheads) than the GRE-EPI image, which is distorted by artifacts from frontal sinuses and calvaria. The GRE-EPI image is more sensitive to the white matter lesions than is the GRE image (small arrows).
C and D, Fewer lesions are seen on the SE-EPI (C) and TSE (D) images than on the GRE and GRE-EPI images (arrows and arrowheads).
E and F, The s-HASTE (E) and HASTE (F) images do not show the small hemorrhagic lesions (arrows and arrowheads). Note the interface low intensity between CSF and cerebral parenchyma on the s-HASTE image, which should not be mistaken for hemosiderosis (curved arrow).
G and H, Lower sections around the skull base. Susceptibility artifacts (arrows) from the skull base obscure the lesions at the infratentorial and skull-base level on the GRE-EPI image (H) and less so on the GRE image (G).
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