Figure 7.

The DC and 95HD scores with respect to the increasing number of iterations, as more 3D‐CNNs are interleaved for joint segmentation of small tissues in the head and neck CT images. The 4th iteration strategy proves to be effective with better DC or 95HD score than using fewer iterations. The observation confirms the effectiveness of interleaving multiple CNNs for small tissue segmentation in the Challenge dataset. The asterisks denote statistical significance (i.e., P < 0.05 in t tests). [Color figure can be viewed at wileyonlinelibrary.com]