FIG 3. Initial and follow-up proton MR spectroscopy in a patient with left hippocampal seizures.

A, Single-voxel MR spectrum (TE = 135) shows inverted doublet of lactate (L). The level of NAA (N) is normal.

B, The right hippocampus shows no lipids/lactate and a normal relationship between NAA (N) and Cr (C).

C, Study obtained 4 months after initial examination, with patient seizure-free, shows no significant lipids/lactate in the left hippocampus. Relative to the contralateral hippocampus, the level of NAA is slightly decreased with respect to Cr and Cho.

D, MR spectrum shows the right hippocampus to be normal.