Interreader reproducibility tended to be higher for relatively experienced readers than for less experienced readers and to be higher in the PZ than in the TZ. For the relatively experienced readers, reproducibility was similar for PI-RADS and Likert scales in the PZ but was somewhat higher for the Likert scale than for PI-RADS in the TZ.

The learning curve in prostate tumor detection largely reflected self-directed learning. Continual feedback had a lesser effect. Clinical prostate MRI interpretation by novice radiologists warrants caution.

A combination of size and quantitative MRI metrics can potentially be used as markers of stage and grade of bladder cancer.

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