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FIG 6. Patient 1 (astrocytoma, WHO grade II).
Top left, T2-weighted fast spin-echo image before craniotomy shows high signal intensity of the temporal astrocytoma (arrow).
Top right, T2-weighted fast spin-echo image after corticotomy for surgical access to the tumor.
Bottom left, T2-weighted fast spin-echo image at the point at which resection was considered complete by the neurosurgeon and by the radiologist reveals no residual tumor at this slice.
Bottom right, After closure of the craniotomy, the bed of resection is displayed with high signal intensity, probably caused by a mixture of blood, CSF, saline, and hemostatic material.
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