title: An asymmetric screen pair for angiography.
abstract: Commercially available rare-earth screens are mechanically softer and less abrasion resistant than calcium tungstate screens. This leads to problems in radiography without the use of cassettes in areas where particulate matter appears. The benefits of an asymmetric screen pair in Schonander changers in which the movable front screen is calcium tungstate and the back screen is a Du Pont Quanta III are investigated. The image is sharper, the quantum mottle is less apparent, the speed remains high, and the physical durability of the system is improved in comparison to a pair of Quanta III screens.
mesh_terms: D000792:Angiography / Q000295:instrumentation*; D006801:Humans; D008674:Metals, Rare Earth; D013679:Technology, Radiologic
chemical_list: D008674:Metals, Rare Earth