X-ray or gamma ray systems or devices – Electronic circuit – X-ray source power supply
Patent
1987-09-23
1989-05-16
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Electronic circuit
X-ray source power supply
378117, 378 97, 378 96, G01T 100
Patent
active
048316423
ABSTRACT:
A MAS regulating system for high frequency medical X-ray generator produces a control signal to stop the exposure when the milliamp-seconds delivered by the X-ray tube becomes equal to or greater than a desired maximum amount set by an operator. The system comprises a converter circuit for converting a signal corresponding to a desired MAS value set in by the operator into a first digital signal having a predetermined format. A digital integrator circuit integrates and converts the actual MA current in the X-ray tube to a digital MAS signal corresponding to the actual MAS value of the current in the X-ray tube and in the same predetermined format as the first digital signal. A comparing circuit compares the first and second digital signals and produces a control signal to stop the exposure when the second digital signal is greater than the first digital signal.
REFERENCES:
patent: 3971945 (1976-07-01), Franke
patent: 4035648 (1977-07-01), Patel
patent: 4047043 (1977-09-01), Meyer
patent: 4158138 (1979-06-01), Hellstrom
patent: 4178508 (1979-12-01), Hotta et al.
patent: 4593371 (1986-06-01), Grajewski
patent: 4748648 (1988-05-01), Boucle et al.
Fields Carolyn E.
French Roger J.
Gendex Corporation
Hynds Joseph A.
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