Each image in a first set of images (300) includes respective exposures of an image capture device (115) to a beam of radiation (111), each of a plurality of components (120, 125, 130) of a radiation delivery system (100) being at respective specified orientations with respect to a three-dimensional coordinate system during each of the exposures. Respective beam images (405) are reconstructed from each of the exposures by drawing a line at a predetermined angle to the first image (300) and through a center of a radiation beam (310) shown on each first image (300). The reconstructed beam images are combined on a second image (400).
