Article Figures & Data
Figures
- fig 1.
Concordance among MR imaging, MRS, and PET in right hippocampal sclerosis. Oblique coronal T2-weighted MR image (top row, middle) shows right hippocampal sclerosis (arrow), in concordance with PET scan (bottom row, middle), which shows decreased metabolism in right temporal lobe (arrow). The MR spectrum from the right hippocampus (Rt) shows marked decrease in NAA/Cho ratio (arrow). The MR spectrum from left hippocampus is normal (Lt)
- fig 2.
Discordant MRS with MR imaging and PET in left hippocampal sclerosis. Oblique coronal T2-weighted MR image (top row, middle) shows left hippocampal atrophy (arrow), in concordance with PET scan (bottom row, middle), which shows decreased metabolism in left temporal lobe (arrow). However, the MR spectrum from the left hippocampus (Lt) appears within normal range (false-negative finding), based on the abnormal criteria of an NAA/Cho ratio of 0.8 or less or an NAA/Cr ratio of 1.0 or less. The MR spectrum from the left hippocampus (Lt) shows a decrease in NAA/Cho and NAA/Cr ratios (arrow) on right side (Rt) (false-positive finding)
- fig 3.
Bilateral abnormality on MRS in left hippocampal sclerosis. Oblique coronal T2-weighted MR image (top row, middle) shows left hippocampal sclerosis with increased signal intensity (arrow), in concordance with PET scan (bottom row, middle), which shows decreased metabolism (arrow) in left temporal lobe. The MR spectra (Rt and Lt) show bilateral abnormalities (arrows), decreased NAA/Cho ratios bilaterally, and decreased NAA/Cr ratio on right side
Tables
Summary of MRS and PET results in lateralization of hippocampal sclerosis (n = 33)
