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Table 2 Validation results for T2 and T1 MRI images without perceived distortion and T1 MRI images degraded by bias fields

From: Standardized quality metric system for structural brain magnetic resonance images in multi-center neuroimaging study

MRI volume data Number of slice Average objective score Average subjective score Objective- subjective correlation coefficient Inter-observer correlation coefficient
T2 without perceived distortion 50 0.80 0.70 0.84 0.90
T1 without perceived distortion 50 0.70 0.60 0.80 0.85
T1 degraded by bias fields 50 0.40 0.30 0.75 0.75