Apparatus for producing panoramic x-ray image projections

Details Apparatus for producing panoramic x-ray image projections Apparatus for producing panoramic x-ray image projections

1990-03-28

1991-04-30

Westin, Edward P.

X-ray or gamma ray systems or devices

Specific application

Dental panoramic

378 39, 378168, 378170, 378197, A61B 614

Patent

active

050125010

ABSTRACT:
Apparatus for producing panoramic x-ray image projections of the dental arch on X-ray film. The apparatus includes a fixed body (1). The opposite ends of a movable supporting arm (11) are fitted with an X-ray source (12) and a film holder (13) that may be positioned on opposite sides of the dental arch. A first drive (20-23) produces a rotating motion of supporting arm (11) with respect to the arch. A second drive (2, 4) sets the center of rotating motion in linear movement in dependence on the angular position of supporting arm (11). The apparatus further includes a selector (3, 6, 10) for selecting the direction of linear motion (translatory motion) as desired. The selector includes a rotary plate (3), journalled (9) to the body (1) and to which is journalled (8) a linear plate (2) facilitating the linear motion; a motor (10), which is mounted on the rotary plate (3) and which, by means of its associated pinion and a tooth rim ( 6) provided on body (1), translates the rotary plate (3) to a desired angular position; and a sensor (19) for the determination of a desired angular position.

REFERENCES:
patent: 4039837 (1977-08-01), Ohta et al.
patent: 4241254 (1980-12-01), Valila 378168

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