Figure 1. Effect of correctness of computer-aided detection (CAD) output on case difficulty (rate of false negative errors). d_p, prompted difficulty; d, unprompted difficulty; w, cancer that was wrongly processed by CAD; c, cancer that was correctly processed by CAD. ---, logistic regression curve for wrongly processed cancers; -·-·, logistic regression curve for correctly processed cancers; —, logistic regression curve for all cancers.