Reference marker orientation system for a radiographic film-base

Details Reference marker orientation system for a radiographic film-base Reference marker orientation system for a radiographic film-base

1990-04-30

1991-12-03

Jablon, Clark A.

Boots, shoes, and leggings

2504911, 378163, G01N 2300

Patent

active

050704540

ABSTRACT:
An object is exposed to penetrating radiation at each of a plurality of partial rotations of the object. Radiation transmitted through the object strikes a separate sheet of radiographic film for each exposure to record an entire radiographic image of the object for each angular orientation. At least two reference markers for providing a reference relative to the object are positioned between a rotating device and the sheet of radiographic film. They are positioned so that their centers constitute the base points of an equilateral triangle, the apex point thereof being the center of the rotating device.

REFERENCES:
patent: 3742236 (1973-06-01), Richards
patent: 3818220 (1974-06-01), Richards
patent: 4598369 (1986-07-01), Wang et al.

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