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FIG 1. Proton SVS study of the left hippocampus of a healthy adult.
A, This coronal T2-weighted image (3000/85/1) is the central section for voxel positioning, about 1 to 2 mm anterior to the ipsilateral internal acoustic canal. The voxel is 20 x 20 x 20 mm3. Part of the hippocampal head and body are included for measurement.
B, There are three major peaks in this proton spectrum: NAA at 2.0 ppm, Cr at 3.0 ppm, and Cho at 3.2 ppm. The NAA peak is usually, but not necessarily, higher than the other two.
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