FIG 5. Patient 4 (oligodendroglioma, WHO grade II).

Top left, The first control image (T2-weighted fast spin-echo) shows hyperintense tumor-suspicious tissue (arrows) in the bed of resection.

Top right and bottom left, Abnormalities are also seen on the interactively guided single-shot fast spin-echo images (arrows). The MR Track Pointer is used to localize the suspicious area (arrowhead).

Bottom right, Before closure of the craniotomy, T2-weighted fast spin-echo image shows the final result of the resection. The tumor-suspicious tissue was reduced; nevertheless, some nodular areas are still suggestive of residual tumor. Because of the proximity of this region to the language cortex, the resection was stopped at this point. The patient had no postoperative neurologic deficit.