Radiographic image enhancement
US4293640A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1980 |
| Grant date | Oct 6, 1981 |
| Priority date | — |
| Expiry date | Jul 21, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/168
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for reducing patient and personnel hazards from exposure to X-radiation during diagnostic procedures, comprising irradiating a photographic emulsion to produce an underexposed radiograph, developing and fixing the radiograph and treating the underexposed processed radiograph in a one-step copper ion image enhancement composition to intensify the image profile to a level at least equivalent to a fully exposed radiograph and subsequently darkening the enhanced image by treatment in a one-step iron ion darkening composition to blacken the image profile. The copper ion image enhancement composition and subsequent iron ion darkening composition produces a darkened or blackened image profile as is found in conventional radiographs and enables a reduction in radiation exposure to patient and personnel up to 50% and more over what is generally regarded as the usual level of radiation for a given diagnostic radiographic examination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.