Methods for improving colorectal cancer annotation efficiency for artificial intelligence-observer training

Figure 1 Artificial intelligence segmentation by models with skipped slice training. A-C: Artificial intelligence (AI) segmented lesion by model trained without skipping slices (A), with skipping 1 slice (B), and with skipping 2 slices (C). There is slight difference in the segmentation, but insufficient to modify the Dice coefficient. The cancer is in the descending colon, only a small portion of which was segmented by AI model. The slightly larger false positive lesion may be due to slightly different slice level.