X-ray or gamma ray systems or devices – Specific application – Dental panoramic
Patent
1982-09-28
1985-02-19
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Dental panoramic
378 91, 378108, G03B 4116
Patent
active
045010102
ABSTRACT:
An exemplary embodiment comprises an exposure unit including an X-ray tube and a cassette holder rotatable about vertical axes and between which the head of the patient is disposed. A radiation detector is disposed at the cassette holder for supplying an electrical signal corresponding to the dose rate when it is struck by X-rays and being interconnected with an X-ray tube voltage controller and a dose rate regulator in such manner that the X-ray tube voltage is influenced by the output of the radiation detector to control the dose rate to a value producing an optimum film blackening. A function generator determining the speed of the exposure unit is provided in which a speed curve is stored given which the radiation dose influencing the film is approximately constant.
REFERENCES:
patent: 4021672 (1977-05-01), Franke
patent: 4063099 (1977-12-01), Grassme
patent: 4286162 (1981-08-01), Suzuki
patent: 4333012 (1982-06-01), Furuichi
Church Craig E.
Siemens Aktiengesellschaft
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