Fig. 3

Class activation heatmap for a malignant lesion. a: input mammographic image; the white arrow shows a benign breast lesion. b: Heatmap of (a)c: Fusion image of a and (b) The large intensity of activation in the breast lesion reinforcement region is evident from the heatmap, which may reflect the difference between benign and malignant breast lesions identified by the convolutional neural network. The lesion was pathologically confirmed as a fibroadenoma