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Table 3 Validation results for T2 MRI images degraded by blurring with circular averaging filter

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

Distortion level Number of slice Average objective score Average subjective score Objective- subjective correlation coefficient Inter-observer correlation coefficient
0 50 0.80 0.70 0.84 0.85
5 50 0.70 0.70 0.72 0.80
10 50 0.50 0.40 0.75 0.75
15 50 0.30 0.30 0.70 0.65