Panoramic tomography X-ray apparatus

Details Panoramic tomography X-ray apparatus Panoramic tomography X-ray apparatus

1984-09-20

1986-05-13

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Dental panoramic

378 40, A61B 614

Patent

active

045891222

ABSTRACT:
The invention relates to a panoramic tomography X-ray apparatus, particularly a so-called narrow beam tomographic apparatus for imaging the teeth and jaw area of a patient, wherein an X-ray source (14) and imaging means, e.g. a film cassette (6), are by means of an arm member (13) or the like connected to each other on opposite sides of a target to be imaged and adapted for the actual imaging to be rotated around said target to be imaged. For establishing a constant magnification or enlargement and reducing a radiation dosage the apparatus comprises means for moving said imaging means during the imaging in the direction parallel to a beam of X-rays (15) in a manner that the distance of said imaging means from a selected layer to be imaged remains substantially unchanged. In practice, this is achieved by employing a guide profile (2), from which said imaging means are kept during the imaging at a constant distance by means of a motion in the direction of said beam of X-rays (15).

REFERENCES:
patent: 3673408 (1972-06-01), Moss
patent: 4263513 (1981-04-01), Palluet
patent: 4264820 (1981-04-01), Hotta
patent: 4534048 (1985-08-01), Welander et al.

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