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. 2021 Jul 27;25:100681. doi: 10.1016/j.imu.2021.100681

Fig. 3.

Fig. 3

The architecture of the standard 3D U-Net. The network takes a 3D patch (cuboid) and outputs the segmentation of lungs and infected regions by COVID-19. Skip connections were implemented with concatenation layers. Conv: Convultional layer; ReLU: Rectified linear unit layer; BN: Batch normalization.