FIG 2. Single- voxel MR spectroscopy (right panel) by using a stimulated-echo acquisition mode with a TR of 1500 ms and TE of 30 ms. The spectral pattern is technically limited and suboptimal (note the poor baseline).

A 2.5 x 2.5 cm voxel of the right putamen lesion was localized based on the FLAIR axial image on day 18 (left panel) at the level of the frontal horns of the lateral ventricle. The spectral pattern shows, from left to right, a moderate increase in choline (solid arrow), a moderate reduction in N-acetyl-aspartate (solid arrow), and a marked lactate peak (solid arrow). There is also a mild prominence of (amino acid) peak (dashed arrow).