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Interface of the semi-automatic software. In this figure, the computer interface is demonstrated. Edges (arrows) of the breast are first identified, then the radiologist adjusts the threshold (in the semi-automated method) and finally the percentage of background parenchymal enhancement (BPE) is read (black circle). In the fully automated method, there is no need to adjust the threshold or to identify the breast edges. In this example, the BPE percentage is 13.9%.
