Fig. 1

Generation of a synthetic cephalogram image of the mandible from the CBCT volume of the mandible using a digitally reconstructed radiography (DRR) technique. The radiography system was modeled as an ideal perspective projection of a point source X-ray through the bone onto the image plane. The CBCT volume of the mandible was positioned within the radiographic projection model with the principal axis of the projection defined as the line connecting the most prominent points on the medial surfaces of the bilateral condyles