Method of using a panoramic X-ray photography apparatus for tomo

Details Method of using a panoramic X-ray photography apparatus for tomo Method of using a panoramic X-ray photography apparatus for tomo

1993-05-20

1994-12-06

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Dental panoramic

378 39, 378168, A61B 614

Patent

active

053717759

ABSTRACT:
The invention relates to a panoramic X-ray photography apparatus having a rotatably mounted supporting arm (1) which has at one end an X-ray source (2) and at the opposite end an image receptor (3), in which case the object is placed between the X-ray source (2) and the image receptor (3) and the imaging is carried out by rotating the supporting arm. The idea of the invention is that a simple panoramic X-ray photography apparatus can also be used for tomography, since the object to be imaged, i.e. the denture, contains mainly vertical surfaces and a horizontal oscillating movement suffices for blurring them. An additional idea is that by moving the bearing shaft (4) of the supporting arm along a circle arc portion during blurring, the fulcrum can be shifted to outside the bearing shaft, thus eliminating certain limitations imposed by the mechanics of a conventional X-ray photography apparatus with respect to the area to be imaged and the location of the supporting arm.

REFERENCES:
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patent: 4241254 (1980-12-01), Valila
patent: 4263513 (1981-04-01), Palluet
patent: 4264820 (1981-04-01), Hotta
patent: 4661967 (1987-04-01), Nishikawa
patent: 4852134 (1989-07-01), Kinanen et al.
patent: 4955042 (1990-09-01), Nishikawa
patent: 4985907 (1991-01-01), Moteni
patent: 5012501 (1991-04-01), Palonen et al.

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