Anti-scatter grid system
US4875227A · kind A · utility
Inventors
Key dates
| Filing date | Sep 30, 1988 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Sep 30, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K1/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Apparatus and method for use in conjunction with an X-ray apparatus, for filtering scattered irradiation and enhancing recordation of unscattered irradiation transmitted through a subject exposed to an X-ray analysis beam. The apparatus includes a grid mechanism including filtration strips which filter scattered irradiation and obstruct unscattered irradiation from detection, a mechanism for recording an analog image of the subject from the detector, a mechanism for converting the analog image to an equivalent digital image, and a mechanism for reconstructing the image as if the unscattered irradiation absorbed by the grid were not obstructed from detection. The method comprises projecting a beam of X-ray photons at and through the subject to be examined, aligning an X-ray photon sensitive detector behind the subject with the beam of photons, filtering the scattered X-ray photons transmitted through the subject from detection with a grid of X-ray absorptive strips, recording an analog image of the subject from the detector, converting the analog image to an equivalent digital image, and reconstructing the image as if the unscattered photons are not obstructed or absorbed by the str…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.