X-ray exposure regulator

Details X-ray exposure regulator X-ray exposure regulator

1988-08-15

1990-05-29

Fields, Carolyn E.

X-ray or gamma ray systems or devices

Electronic circuit

X-ray source power supply

378110, 378111, 378112, H05G 132

Patent

active

049301454

ABSTRACT:
A filament current regulator for an X-ray generator includes a circuit which compares the actual X-ray tube filament current to a predefined filament current reference value. Another circuit is included which compares the actual X-ray tube excitation voltage, applied across the anode and to cathode of the tube, to a predefined reference voltage value. The regulator adjusts the filament current during a first time interval of an exposure based on only the filament current comparison, and during the remainder of the exposure based substantially on the excitation voltage comparison. The regulator apparatus also integrates the difference between the actual filament current and the reference current value over a given interval during the exposure. The integrated result is employed by the regulator to redefine the filament current reference value.

REFERENCES:
patent: 3521067 (1970-07-01), Splain
patent: 3974387 (1976-08-01), Bronner et al.
patent: 4177406 (1979-12-01), Hermeyer et al.
patent: 4322797 (1982-03-01), Lickel et al.
patent: 4366575 (1982-12-01), Bax
patent: 4797908 (1989-01-01), Tanaka et al.

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