X-ray or gamma ray systems or devices – Electronic circuit – Exposure timer
Patent
1986-11-13
1989-03-07
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Electronic circuit
Exposure timer
378118, 378110, H05G 146
Patent
active
048113743
ABSTRACT:
An apparatus for setting the exposure parameters of an X-ray generator that comprises an X-ray transformer for supplying high voltage and filament current to an X-ray tube, in which data relating to the functional relationships between the unloaded voltage of the X-ray transformer, the loaded voltage thereof, the anode current of the X-ray tube and the filament current are stored in the memory of a processor, and based on a measured unloaded voltage and a preset mAs exposure value the processor calculates and displays the loaded high voltage, sets a suitable discrete filament current and determines the exposure time corresponding to the predetermined mAs value in such a way that the X-ray tube cannot be overloaded. If the predetermined exposure data cannot be set due to overload, the processor indicates this fact, whereby the operator can either adjust the voltage or change the exposure parameters.
REFERENCES:
patent: 4035648 (1977-07-01), Patel
patent: 4072865 (1978-02-01), Craig et al.
patent: 4158138 (1979-06-01), Hellstrom
patent: 4160906 (1979-07-01), Daniels et al.
Farkas Istran
Kasa Zoltan
Fields Carolyn E.
Hynds Joseph A.
Medicor USA Ltd.
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