Methods of increasing anterior layer thickness of continuous den

Details Methods of increasing anterior layer thickness of continuous den Methods of increasing anterior layer thickness of continuous den

1983-01-03

1985-08-06

Smith, Alfred E.

X-ray or gamma ray systems or devices

Specific application

Dental panoramic

378 38, G01N 2100, G01N 2300, G03B 4116

Patent

active

045340480

ABSTRACT:
Effective centers of rotation of the X-ray beams when projecting the anterior regions are caused to be disposed considerably more interiorly of the dental arch, i.e., farther from the incisors and closer to the X-ray source, to thus provide longer projection radii of the beams at the anterior region. Lengthening of the projection radii is achieved through unique velocity profiles of patient chair movement along an x-axis and film travel within the camera. The longer effective projection radii of beams at the anterior region provide for a substantially wider or thicker layer thereat with a concomitant modest narrowing of the layer at the canine regions.

REFERENCES:
patent: 4251730 (1981-02-01), Cushman
patent: 4321472 (1982-03-01), Cushman
patent: 4340971 (1982-01-01), Furuichi

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