Fig. 2.

Different forms of annotation used in our proposed incomplete annotation. In particular, for a given image, oncologists can delineate (a) the whole image (W-Image), (b) a set of consecutive slices (C-Slice), or (c) a set of typical separate slices (S-Slice). The form of annotation depends on the confidence and availability of oncologists. The annotation is performed along with the axial view while displayed in the sagittal view for checking of clarity, as shown in the second row of this figure. Red indicates the prostate, green indicates the bladder, blue indicates the rectum, white indicates the background, and gray indicates the unannotated voxels.