rare-earth screen
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rare-·earth screen
an intensifying screen (6) made of a rare-earth oxide phosphor, more efficient than calcium tungstate, especially at the higher kilovoltages used in modern radiography.
rare-earth screen
an x-ray-intensifying screen made of rare-earth elements, such as yttrium and gadolinium. These screens enable lower radiation doses to be used while producing acceptable film densities.
screen
1. a framework or agent used as a shield or protector.
2. to examine.
fast screen
permits big reduction in exposure to x-ray beam.
screen film
prepared to be used with intensifying screens. The standard film and marketed as being of standard, fast or ultrafast speeds.
rare-earth screen
see rare-earth intensifying screen.