X-ray or gamma ray systems or devices – Specific application – Dental panoramic
Patent
1987-02-05
1989-03-21
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Specific application
Dental panoramic
378 39, 378 40, 378108, 378168, A61B 604
Patent
active
048151157
ABSTRACT:
The invention relates to a method of photographing a desired object with a panoramic X-ray apparatus fitted with automatic exposure, comprising an X-ray generator (4, 5), an X-ray tube (5) and a film (7) with its holder. In the method, the detection of a cone of rays (9) penetrated through an object is effected before the actual filming is started and, after the detection, the filming is effected by using a cone of rays (6), directed so as to bypass a detector (1).
REFERENCES:
patent: 4433430 (1984-02-01), Fredzell
patent: 4475224 (1984-10-01), Grassme
Nieminen Tero
Nieminen Timo
Fields Carolyn E.
Porta David P.
Radiante Oy
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