Illustration of the structure for (a) Type-I fusion networks, (b) Type-II fusion network and (c) Type-III fusion network. The yellow arrows indicate the fusion location.
(a) Ground truth shown as yellow contour line overlaid on the T2 image. (b) Result from Type-II fusion network based on PET+CT+T1. (c) Result from single-modality network based on T2. (d-f) Results from single-modality network based on PET, CT and T1, respectively.