Fig. 2.

Workflow of the DLRU

DLRU consists of DLR-1 and DLR-2. The US images at the radial and anti-radial planes were input into the DLR network respectively, which outputs the probability of the SLN metastasis. DLR-1 in the form of the decision tree combined with the DLR model and the AUS report outputs the final predictive risk of the involved SLN. The patient with a high-risk (HR) metastatic SLN will receive an SLND. Finally, the risk of NSLN involvement of the HR SLN patients with positive SLN confirmed by the SLND will be obtained, using DLR-2.