Photothermographic materials with opaque crossover control...

Details Photothermographic materials with opaque crossover control... Photothermographic materials with opaque crossover control...

2006-09-26

2006-09-26

Chea, Thorl (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Thermographic process

Heat applied after imaging

C430S139000, C430S510000, C430S512000, C430S513000, C430S514000, C430S531000, C430S965000, C430S966000, C430S967000

Reexamination Certificate

active

07112399

ABSTRACT:
Photothermographic materials are coated with thermally developable imaging layers on both sides of the support. Such materials can be arranged in association with one or more phosphor intensifying screens capable of providing emission at a predetermined wavelength in imaging assemblies. These imaging assemblies can be exposed to X-radiation and thereby form a latent image in the photothermographic material that can eventually be heat developed and used for medical diagnosis. The photothermographic materials contain an opaque material that acts as a crossover control agent that absorbs radiation at the predetermined wavelength, for example at 300 to 450 nm, and has limited absorption at higher wavelengths. When the photothermographic material is heated, the opaque material loses its opacity. Additional crossover control agents, such as UV-absorbing compounds, can also be added to the support or to an antihalation layer.

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U.S. Appl. No. 10/896,108, filed Jul. 21, 2004, titledPhotothermographic Materials With UV Absorbing Compounds,by Dickerson & Schroeder.

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