Patent · US Expired

Device for scanning an X-ray image

US5097493A · kind A · utility

10Cited by

1References

18Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

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

Key dates

Filing date	Feb 12, 1991
Grant date	Mar 17, 1992
Priority date	—
Expiry date	Feb 12, 2011

Classification

Technology area (CPC G)Physics
CPC primaryG01T1/2921
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A plurality of electrometer probes scan the charge pattern of a photoconductor (1), the distance between the electrometer probes (6) and the photoconductor (1) being measured via an alternating voltage applied to the photoconductor (1). The alternating voltage is scanned by the electrometer probes and is filtered out to extract distance measuring signals. The output signals of all electrometer probes (6) are used for determining image values of the X-ray image, the output signals of at least some of the electrometer probes (6) also being used, via a suitable filter (23), for determining the distance measuring signals. An adjusting device adjusts the distance between the electrometer probes (6) and the photoconductor (1) continuously to a reference value, in dependence on the value of the measuring signals, during the scanning operation.

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