Patent · US Expired

X-Ray examination apparatus with dose control

US6295336A · kind A · utility

7Cited by

10References

10Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Til Aach · Aachen, DE
Dietmar W. Kunz · Aachen, DE

Key dates

Filing date	Oct 19, 1999
Grant date	Sep 25, 2001
Priority date	—
Expiry date	Oct 19, 2019

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B6/545
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

An x-ray examination apparatus comprises an x-ray source for generating an x-ray image and an image analysis system derives brightness variations from the x-ray image and derives a dose control signal dependent on said brightness variations in order to control the x-ray source. The image analysis system derives a distribution of said brightness variations and derives the dose control signal from the distribution of brightness variations. Preferably, the image analysis system is arranged to derive the brightness variations from the processed image and a histogram analysis is employed to derive the dose control signal.

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