FIG 3. A 54-year-old patient with astrocytoma II of the right temporal lobe after surgery and stereotactic radiotherapy. T2-weighted turbo spin-echo images obtained before (A) and 9 months after radiotherapy (B) show a hyperintense lesion within the irradiated insula on the right hemisphere, a surgical tissue defect in the right temporal, and gliosis in the right occipital lobe (T1-weighted spin-echo images showed no uptake of contrast medium.) Corresponding ¹H MR spectra (double spin-echo sequence 1500/135/200) acquired 9, 15, and 21 months after stereotactic radiotherapy (C–E) demonstrated similar signal intensities of tCho and tCr, with only minor changes during follow-up. MR imaging follow-up showed no further change of the lesion consistent with diagnosis of nonneoplastic lesion