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Cervical spinal cord MTR, MD, and FA histogram-derived metrics from a patient with Hirayama disease and age-matched healthy control subjects
Control Subjects Mean (SD)Normality Ranges (mean ± SD)HD Patient
Average MTR (%)35.3 (1.2)32.9–37.730.2
Average MD (×10−3 mm2s−1)1.22 (0.08)1.06–1.381.44
Average FA0.43 (0.03)0.37–0.490.32
  • Note:—MTR indicates magnetization transfer ratio; MD, mean diffusivity; FA, fractional anisotropy; HD, Hirayama disease.