To evaluate the intra-observer reproducibility, native T1 images from 20 patients were re-analyzed by the same operator after 4 weeks. To evaluate the inter-observer reproducibility, the same images were blindly analyzed by a second operator. The coefficient of variation (CoV) was calculated as the ratio of the SD to the mean, multiplied by 100. The intraclass correlation coefficient (ICC) was obtained from a two-way random effects model with measures of absolute agreement. The Bland–Altman technique was used to plot the absolute difference versus the average values between the two datasets. Bias was the mean of the difference between the two sets of values and agreement was the mean ± 1.96 SDs.

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