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FIG 1. T1-weighted MR images of a 43-year-old female patient with multiple sclerosis, superimposed with the size and location of the 8LR x10AP cm2 MR spectroscopy volumes of interest. The volumes of interest contained an approximately 1-cm diameter T1-hypointense lesion (arrow); the metabolite concentration ratios were NAA = 0.18, Cr = 0.21, and Cho = 0.25. The image contrast ratio was 0.76.
A, Sagittal view.
B, Axial view.
C, Real part (1.7–3.7 ppm range) of a 6 x 6 proton spectra matrix (0.2 cm3 voxels) from the 3 x 3 cm2 dashed box shown in B, containing the lesion (circle).
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