Performance on Rectum
Based on the Dice, Jaccard, and average symmetric surface distance metrics, the DIRNet 4 model achieved a higher score for the rectum. Mean Dice, ASSD, and Jaccard coefficients of 0.93 ± 0.02, 1.06 ± 0.42, and 0.88 ± 0.04, respectively, were obtained from the DIRNet 4 model for the rectum. More detailed results are presented in Tables Radar plots of the quantitative metrics. Results are shown for three metrics, five DIRNet models, and three organs averaged over 15 patients. The colored polygon represents the organs (blue: cervix, red: bladder, and green: rectum). Each corner corresponds to a variant of DIRNet models. Each model has three scores (at the corners) for three organs. For the Dice measure (left plot), the DIRNet 4 has a greater dice score relative to all other DIRNet variants, except for the DIRNet 3 in the bladder. Similarly, for the Jaccard coefficient (middle plot), the DIRNet 4 has a greater score for all organs, in comparison with all other DIRNet variants. Regarding the average symmetric surface distance (ASSD) (right plot), the DIRNet 4 also has a lower score (best match) for all organs, and the DIRNet 3 has a similar ASSD score as the DIRNet 4 for the cervix