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Fig 4. MR spectroscopy findings (patient 8, 20 months of age). On the upper right image corners, axial T2-weighted images (4157/100/2, TR/TE/NEX) show localization of an 18 x 18 x 18 mm region of interest over the right posterior periventricular white matter. A, Short echo-time MR spectrum (PRESS; 2000/23 ms, TR/TE) shows elevation of mIns/Cr and Cho/Cr ratios, normal NAA/Cr ratio, and abnormally elevated lipid peak at 1.29 ppm. B, Intermediate echo-time MR spectrum (PRESS; 2000/144 ms, TR/TE) confirms elevated Cho/Cr and normal NAA/Cr.
