Quantitative cervical spinal cord (C-spine) MRI offers promising biomarkers for progressive multiple sclerosis (MS). The intra- and inter-site, short- and long-term reproducibility of these quantitative C-spine MRI measurements is crucial for designing longitudinal or multi-site study. In this two-site pilot study, we evaluated the reproducibility of quantitative C-spine MRI and demonstrate the feasibility of multi-site study with high reproducibility using a harmonized protocol.
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