Process for the control of the position of the focus of an X-ray

Details Process for the control of the position of the focus of an X-ray Process for the control of the position of the focus of an X-ray

1985-05-17

1987-06-23

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

378126, 378205, G21K 100

Patent

active

046758925

ABSTRACT:
The invention relates to a process for the controlling of the position of the focus of an X-ray tube, a applicable to the monitoring of X-ray equipment equipped with X-ray tubes and to the installation of the latter in shields. The invention also relates to a control apparatus for performing the above process. According to the process of the invention, the image of the focus of an X-ray tube is produced on two X-radiation sensitive, contiguous detector means. Each of the detector means supplied an output signal, whose amplitude is a function of the distribution of said image of said detector means. The output signals are applied to a comparison means, which supplies a difference signal linked with the position of the focus along a first given axis.

REFERENCES:
patent: 3121793 (1964-02-01), Thomas
patent: 3130313 (1964-04-01), Tilling
patent: 4075489 (1978-02-01), Neal et al.
patent: 4123659 (1978-10-01), Oliver
patent: 4160909 (1979-07-01), Froggatt
patent: 4162420 (1979-07-01), Grady
patent: 4404591 (1983-09-01), Bonar
patent: 4426721 (1984-01-01), Shih-Ping
patent: 4464778 (1984-08-01), Goldmann
"New Device for Accurate Measurement of the X-Ray Intensity Distribution of X-Ray Tube Focal Spots" by Doi et al. Medical Physics, vol. 2, #5 (Sep./Oct. 1975) pp. 268-273.

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