FIG 6.

TSI findings in a 46-year-old woman with a large right parietal mass later confirmed to be an oligodendroglioma.

A–E, An inversion-recovery anatomic reference scan (A) shows the extent of the lesion. The intended site of the burrhole is indicated by an MR-visible surface marker (arrow, A). The Cho (B), Cr (C), NAA (D), and lipid (E) images are shown with anatomic contours extracted from the inversion-recovery image superimposed on them. Cho is enhanced and NAA is reduced throughout the lesion. Cr remains largely isointense throughout the brain and no appreciable levels or lipid are evident