An X-ray diagnostic installation for producing a transverse layer or planigraphic image including a first X-ray measuring arrangement having X-ray source which generates an X-ray beam whose extent of cross-sectional diffusion perpendicular to the layer is equal to the layer thickness, and equal to or...http://www.google.co.uk/patents/US3971948?utm_source=gb-gplus-sharePatent US3971948 - X-ray diagnostic apparatus for producing a transverse layer image
