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Examples of chronic nonenhanced lesions (arrows) in a 50-year-old woman with relapsing-remitting MS. A, T2-weighted image and, B, QSM at QSM1. C, T2-weighted image and, D, QSM at QSM2 (5.5 months later). Two lesions older than 10 years were detected (A, arrows). They appeared isointense on both QSMs (B and D, boxes), which indicated that their susceptibilities were close to NAWM.
