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7T MRSI. 7T MRSI in (A) a patient with multiple sclerosis, showing conventional MRI, mI, NAA and mI/NAA ratio images. Spectra from the T1-hypointense lesion in the right parietal white matter show decreased NAA and elevated tCho and mI. (B) mI/NAA and conventional MRI scans in two MS patients with cortical and sub-cortical lesions; mI/NAA maps depict these lesions clearly. Adapted with permission from Herckova et al. Radiology 2022;303(1):141–150.
