Prediction of prostate cancer grade using fractal analysis of perfusion MRI: retrospective proof-of-principle study.

The Kruskal–Wallis test showed highly significant differences between groups ( p < 0.001), which were identified in pairwise multiple group comparisons between low-grade (group 1), intermediate-grade (group 2), and high-grade (groups 3 and 4) lesions (Fig. 3b ).

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