Patent · US Expired

X-ray apparatus for slit radiography

US4894850A · kind A · utility

3Cited by

2References

5Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Gottfried Frings · Stolberg, DE
Walter Hillen · Besigheim, DE
Ulrich Schiebel · Aachen, DE

Key dates

Filing date	Aug 25, 1988
Grant date	Jan 16, 1990
Priority date	—
Expiry date	Aug 25, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH05G1/26
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to the elimination of streak-like artefacts in slit radiography which are caused by an axial excursion of the rotary anode X-ray tube used for making the radiographs. These streaks can be eliminated by adapting the speed of displacement of the X-ray beam, the number of revolutions per unit time of the anode and the intensity profile of the radiation beam to one another so that for each point the intensity modulation in the half-shade area, caused by the periodic displacement of the focal point, is compensated for.

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