High contrast visually adaptive radiographic film and imaging assembly for thoracic imaging
US6387586B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Nov 7, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
High performance, very high contrast radiographic films exhibit visually adaptive contrast when imaged in radiographic imaging assemblies comprising intensifying screens. These films having at least two tabular silver halide emulsions on each side of a film support, and the emulsion closest to the film support on each side includes chemistry to control crossover and a rhodium dopant and has higher photographic speeds than the other emulsions. In addition, the films can be rapidly processed to provide images having a peak gamma >3.1 while maintaining gammas >1.0 out into the toe of a D vs. logE sensitometric curve to a value of −0.9 logE. These films are particularly useful for thoracic imaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.