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a, Imaging workflow timeline for a typical 5-field intensity modulated radiation therapy fraction. b, Three-step image processing workflow depicting (1) manual marker localizations, (2) Autoscan-based localization, and (3) projection and comparison of marker centers of mass (CoM). CBCT = cone beam computed tomography; EPI = electronic portal imaging; 2D = 2-dimensional; 3D = 3-dimensional.
