Dental X-ray diagnostic device

Details Dental X-ray diagnostic device Dental X-ray diagnostic device

1976-04-29

1978-04-04

Anderson, Bruce C.

Radiant energy

Luminophor irradiation

250478, H05G 130

Patent

active

040829537

ABSTRACT:
A dental X-ray diagnostic device for the preparation of X-ray film pictures in which an X-ray radiation element is located exterior to the patient. A film holder is inserted into the mouth of the patient, and means is provided for setting the exposure time for switching off the X-ray tube high voltage upon reaching the dosage corresponding to optimum blackening of the film. An automatic exposure arrangement measures the exposure time and has a radiation detector attached to the film holder which is connected to a wireless transmitter. An antenna connected to a receiver, receives the transmitted signals and controls the switching circuit for switching off the X-ray high voltage supply. The transmitter is preceded by an integrator for a signal corresponding to the detector signal. A threshold switching circuit has a threshold selected so that upon reaching the dosage corresponding to optimum film blackening, it switches and applies a control signal to the transmitter.

REFERENCES:
patent: 3103590 (1963-09-01), Berglund et al.
patent: 3432657 (1969-03-01), Slavin
patent: 3600584 (1971-08-01), Schneble
patent: 3792267 (1974-02-01), Westerkowsky

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