Enhancement system and method for X-ray imaging
US4937847A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | May 10, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B42/023
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and system are disclosed for producing a photographic image of an X-ray pattern, including the following steps: converting the X-ray pattern to a first pattern of light; exposing a photographic film to said first pattern of light; detecting the light at elemental regions of the first pattern; generating a second pattern of light in a pattern which depends on the detected light; and exposing the photographic film to the second pattern of light. The generating of the second pattern of light includes generating light from a one-dimensional array of light emitters, and moving the array with respect to the photographic film. The disclosed invention provides improvement on the standard radiographic method in the following ways: (1) The recorded film contrast in low X-ray exposure regions that ordinarily would have been recorded in under-exposed regions on a film's characteristic curve will be increased significantly. (2) The overall range of light transmission that must be viewed by the radiologist will be decreased without sacrificing diagnostic information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.