Method of and device for measuring image lag in X-ray system

Details Method of and device for measuring image lag in X-ray system Method of and device for measuring image lag in X-ray system

1989-04-13

1990-01-16

Church, Craig E.

X-ray or gamma ray systems or devices

Electronic circuit

Exposure timer

378207, G01D 1800

Patent

active

048948519

ABSTRACT:
In X-ray systems in which a beam of X-rays radiates through an object to be examined and is converted by an image intensifier into a light image, blur occurs in said image due to the image lag of the X-ray system to moving objects. In order to measure the image lag of X-ray systems in a simple, objective and reproducible manner in operating conditions, a rotating disc having a coiled X-ray absorbing pattern is arranged between the X-ray source and the image intensifier. A number of dark lines then travels at a uniform speed over a strip-shaped horizontal part of the picture produced by the image intensifier comprising the centre of the disc. When a video camera is coupled to the image intensifier the image lag of the X-ray system can be determined from the ratio of the amplitudes of the video signal of an image line situated in the said part of the image with a rotating disc and with a stationary disc.

REFERENCES:
patent: 4541107 (1985-09-01), Ciossi

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