An apparatus and method are provided for X-ray imagery of an object comprising an X-ray source adapted to variably dispose of a point source of X-rays about a first surface of the X-ray source and a detector adapted to receive the X-rays and translate the X-rays into electrical signals. The detector...http://www.google.co.uk/patents/US4718075?utm_source=gb-gplus-sharePatent US4718075 - Raster scan anode X-ray tube
