Patent · US Expired

Image correction method for an X-ray detector

US6600159B2 · kind B2 · utility

5Cited by

1References

5Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Michael Overdick · Eschweiler, DE
Walter Ruetten · Linnich, DE

Key dates

Filing date	Aug 9, 2001
Grant date	Jul 29, 2003
Priority date	—
Expiry date	Mar 13, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH04N5/32
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The invention relates to an image correction method for an X-ray detector which includes a rear-mounted light source with improved correction of the after-image effects.The invention is based on the recognition of the fact that the so-called gain effects cannot be eliminated by means of known methods. The gain effects, however, give rise to an increase of the amplification by a few percents, and hence to a bright image with artefacts, already in the case of customary diagnostic X-ray doses.In accordance with the invention the gain effects are measured by acquisition of light source images by means of the build-in light source; the strength of the gain effect as well as a correction factor are determined pixel by pixel on the basis thereof. The pixel values of the bright image are corrected by means of the correction factor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.