X-RAY EXAMINATION APPARATUS WITH DOSE CONTROL

X-RAY EXAMINATION APPARATUS WITH DOSE CONTROL

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 sy...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: AACH, TIL, KUNZ, DIETMAR, W
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
GAMMA RAY OR X-RAY MICROSCOPES
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
IRRADIATION DEVICES
MEASUREMENT OF NUCLEAR OR X-RADIATION
MEASURING
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
PHYSICS
TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR
TESTING
X-RAY TECHNIQUE
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Beschreibung
Zusammenfassung: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.