Patent ID: 7029819

Claim:
A phosphor screen that comprises an inorganic phosphor capable of absorbing X-rays and emitting electromagnetic radiation having a wavelength greater than 300 nm, said inorganic phosphor being coated in admixture with a polymeric binder in a phosphor layer onto a flexible support, said flexible support comprising a multilayer reflective substrate comprising a first microvoided polyester layer comprising a continuous polyester first phase and a second phase dispersed within said continuous polyester first phase, said second phase comprised of microvoids containing barium sulfate particles, and a second microvoided polyester layer adjacent said first microvoided polyester layer, said second microvoided polyester layer comprising a continuous polyester first phase and a second phase dispersed with said continuous polyester first phase, said second phase comprised of microvoids, and the composition of said first and second microvoided polyester layers being the same or different except that barium sulfate particles have been omitted from said second microvoided polyester layer.