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. Author manuscript; available in PMC: 2022 Apr 1.
Published in final edited form as: Med Phys. 2021 Jan 20:10.1002/mp.14728. doi: 10.1002/mp.14728

Fig. 1.

Fig. 1.

General workflow of the principal component analysis (PCA) approach to generate synthetic CT scans. Deformation vector fields (DVF) from deformable image registration (DIR) between a well-contoured image and other CT scans are used to create the PCA model. Then, the PCA model can simulate random deformations applied to the contoured CT scan, to create infinite number of synthetic CT scans with contours.