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. Author manuscript; available in PMC: 2023 Dec 1.
Published in final edited form as: Med Phys. 2022 Aug 3;49(12):7545–7554. doi: 10.1002/mp.15875

Figure 3.

Figure 3.

Forward deformation results shown in sagittal views. (a1) shows the pCT (moving). (a2) shows the QA CT (target). (a3) shows the deformed CT via VoxelMorph. (a4) shows the deformed CT via proposed method without using DVF’s cycle-consistency regularization. (a5) shows the deformed CT via proposed method using DVF’s cycle-consistency regularization. (b1-b5) show the corresponding zoomed-in image of (a1-a5). (c2-c5) show the difference images before registration, after VoxelMorph registration, after the proposed registration without using DVF’s cycle-consistency regularization and after the proposed registration using DVF’s cycle-consistency regularization respectively. (d2-d5) show the corresponding zoomed-in image of (c2-c5). The window level of CTs is set to [−1000, 1000] HU. The difference image window level is [−300 300] HU.