FLIPPING STEREOSCOPIC RADIOGRAPHS

A radiographic imaging system (100) comprises an X-ray tube (110), a sensor plate (120), and a graphics engine (130). The tube (110) and the sensor plate (120) rotate synchronously about a patient (150) and expose a stereoscopic pair of images which are transmitted to the graphics engine (130). The graphics engine (130) determines (312) the geometry of the system (100). If (314) the pair of images are toed-in relative to each other, the graphics engine (130) converts (316) the images into a parallel geometry. Likewise, the graphics engine (130) also processes (320) the images for keystone distortion, if necessary. Simply flipping the images in the stereo pair distorts the depth of objects in the stereoscopic image. Instead of simply flipping the images, it is desirable to “go behind” the screen (412A) and look at the image from the back. In order to produce a stereoscopic image having this viewpoint, the graphics engine (130) uses the geometry of the radiographic system (100) to adjust (324) the screen parallax of the image after the constituent images are flipped (322) and provide the desired three-dimensional perspective.