X-ray or gamma ray systems or devices – Specific application – Dental panoramic
Patent
1989-06-05
1990-09-04
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Dental panoramic
378 40, G03B 4116
Patent
active
049550420
ABSTRACT:
A dental radiographic apparatus for photographing the entire jaws in which the apparatus includes a rotary arm having an X-ray source at one end and an X-ray film cassette at the other end thereof and operating in the manner that a path of movement of X-ray beam with respect to the dental arch describes a symmetrically extending approximately triangular envelope projecting toward the front tooth region of the dental arch by sequentially shifting the center of rotation of the X-ray beam irradiated from the X-ray source upon the X-ray film cassette, the apparatus being characterized in that it comprises a means for changing the straight-line distance on the medial line of the human body between the apex and receding points of limit of the envelope.
REFERENCES:
patent: 3737660 (1973-06-01), Ando et al.
patent: 4039837 (1977-08-01), Ohta et al.
patent: 4263513 (1981-04-01), Palluet
patent: 4661967 (1987-04-01), Nishikawa
Church Craig E.
Kabushiki Kaisha Morita Seisakusho
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