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FIG 2. Typical normal spectrum from patient with TSC.
A, Axial fluid-attenuated inversion recovery (FLAIR) image shows the sampled region of interest over an area of normal-appearing brain in the cerebral hemisphere contralateral to the cortical tuber.
B, MR spectrum shows that the Cho and Cr peaks are approximately equal in height while the NA peak is approximately double the height of the Cr peak.
C, Axial FLAIR image shows a region of interest for spectroscopic analysis centered over a typical cortical tuber.
D, MR spectrum from the cortical tuber shows that the Cho and Cr peaks are identical in height to those of normal-appearing brain. There is, however, a marked reduction in the height of the NA peak.
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