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. Author manuscript; available in PMC: 2021 Feb 1.
Published in final edited form as: Med Phys. 2019 Dec 25;47(2):626–642. doi: 10.1002/mp.13927

Figure 4).

Figure 4)

512 × 512 voxel sagittal slices from the isotropically spaced volume cubes of the deformably registered CT and MR pairs, pix2pix and CycleGAN sCTs, difference maps (CT – sCT), and per-voxel HU range estimation for sCTs created from 128 × 128 voxel patches with crop=16, stride=32 for overlapping. This results in as many as 48 unique HU estimations per sCT voxel. The largest values in the range estimation map correspond with tissue transition zones, and materials which are ambiguous in standard classification-based MR-CT transformations. Units for all plots are HU, except the MR, which has arbitrary intensity units.