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Longitudinal QSM and T2-weighted FLAIR images of a new Gd-enhancing MS lesion without a QSM rim appearance (rim−). At baseline, the enhancing lesion was isointense on QSM (mean lesion susceptibility = −3.31 ppb), became most hyperintense at 1 year (22.50 ppb), and gradually disappeared in subsequent years (−1.18 ppb at year 5).
