Patent · US Expired

Device for scanning an X-ray image

US6058220A · kind A · utility

5Cited by

11References

12Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Walter Hillen · Besigheim, DE
Stephan Rupp · Forchheim, DE
Ulrich Schiebel · Aachen, DE

Key dates

Filing date	Nov 24, 1993
Grant date	May 2, 2000
Priority date	—
Expiry date	Nov 24, 2013

Classification

Technology area (CPC H)Electricity
CPC primaryH04N23/30
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A device for scanning an X-ray image where a previously locally uniformly charged photoconductor (1) is discharged in dependence on the local intensity, utilizing several electrometer probes which are arranged in a row and which line-wise scan the charge pattern of the photoconductor (1) which is successively displaced in the scanning direction, extending perpendicular to the line direction, the probes supplying, for each pixel, an image value which corresponds to a discharge at the relevant pixel. In order to eliminate streaky artefacts, the image values are applied to an analog-to-digital converter (5), the converted values being stored in an image memory (6), there being provided a signal processor (7) which subjects the image values of neighboring pixels in an image line to a low-pass filter function and which subjects the image values of pixels neighboring one another in the scanning direction to a high-pass filter function.

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