Chronic atrophic gastritis detection with a convolutional neural network considering stomach regions

Figure 1 Overview of preparation of the dataset. CNN: Convolutional neural network; MAG: Manual annotation group; AAG: Automatic annotation group.

Figure 2 Examples of gastric X-ray images for evaluation.

Figure 3 Visualization of the results estimated by the fine-tuned convolutional neural network to select patches from the automatic annotation group at each N_MAG for the chronic atrophic gastritis image shown in Figure 2A. The inside and outside regions of the stomach overlapped since gastric X-ray images were divided into patches with the overlap in this experiment.

Figure 4 Harmonic mean of the detection results obtained by changing N_MAG. Results are shown as means ± SD of five trials. AAG: Automatic annotation group; MAG: Manual annotation group; HM: Harmonic mean.