X-ray filter system for medical imaging contrast enhancement

摘要

A system for creating an image of the internal features of an object includes an X-ray source and detector array positioned to interpose the object between the X-ray source and the detector array. An X-ray beam is passed through the object along a first path. While passing through the object, the beam is successively filtered four times, each time with a different filter. The successive filtration of the beam results in the production of four electrical signals by the detector which are processed to create an image signal for the path. The process is repeated for a plurality of paths through the object and the resulting image signals are combined using traditional computer tomography techniques to produce an image of the object.