Radiant energy – Luminophor irradiation
Patent
1976-04-22
1977-12-13
Anderson, Bruce C.
Radiant energy
Luminophor irradiation
250402, H05G 130
Patent
active
040630994
ABSTRACT:
A dental apparatus for x-ray diagnosis comprises a unit, which includes an x-ray tube and a film holder and is adapted to rotate around a vertical axis, and a support for the head of a patient disposed between the x-ray tube and the film carrier. The apparatus produces general tomograms with a radiographic recording time which is predetermined by a timer mechanism of the x-ray tube/film carrier unit, and by at least one further recording value which is adjustable by a regulating device to provide a nominal or reference recording value. The unit further comprises an x-ray detector disposed on the film carrier in a position in which the detector receives at least the x-ray radiation penetrating the jaw of the patient during the entire duration of an x-ray recording, during which period the detector supplies an electrical signal corresponding to the x-ray dose output. The detector and the regulating device are connected to an x-ray dose output regulator so as to provide automatic exposure such that the adjustable recording value is related to the output signal of the x-ray detector, whereby the x-ray dose output is adapted to a desired value resulting in an optimal exposure of the film. The regulating device for the nominal value for the output dose regulator is associated with a transmitter for transmitting an electrical signal related to the speed of transport of the film such that the nominal value is adjusted to be a function of the transport speed of the film.
REFERENCES:
patent: 2942114 (1960-07-01), McNally
patent: 3737660 (1973-06-01), Ando et al.
patent: 3743832 (1973-07-01), Wright
patent: 3894235 (1975-07-01), Franke
Anderson Bruce C.
Siemens Aktiengesellschaft
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