An assembly of devices used to produce 2-dimensional cross-sectional (tomographic) images on x-ray film at a fixed angle and depth in relation to body position by coordinating a prescribed pattern of non-linear x-ray tube motion (elliptical, circular, clover shaped, spiral, as well as linear, depending on the system design) during exposure sequences. This approach causes the shadow of the selected plane to remain stationary on the moving film while the shadows in both directions of the plane have a relative displacement on the film and are either obliterated or blurred. This GMDN code reflects old technology, now superseded by computed tomography (CT) systems.