Patent · US Expired

Device for producing x-ray images by means of a photoconductor

US4998266A · kind A · utility

7Cited by

13References

16Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Walter Hillen · Besigheim, DE
Peter Quadflieg · Aachen, DE
Ulrich Schiebel · Aachen, DE

Key dates

Filing date	Jun 27, 1990
Grant date	Mar 5, 1991
Priority date	—
Expiry date	Jun 27, 2010

Classification

Technology area (CPC G)Physics
CPC primaryG01R29/24
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a device for producing X-ray images by means of a photoconductor which converts X-rays into a charge pattern, which photoconductor is charged prior to the X-ray exposure, its surface being scanned after the exposure in order to detect the charge pattern. Artefacts are liable to occur in an X-ray image when the exposure directly follows an X-ray exposure during which the photoconductor has received, at least in given areas, a high dose. These artegacts are avoided in accordance with the invention in that there is provided a recharging device which limits the decrease of the charge density on the surface of the photoconductor during the X-ray exposure to a predetermined value.

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