Reference marker orientation system for a radiographic film-based computerized tomography system
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United States of America Patent
Stats
-
Dec 3, 1991
Issued Date -
N/A
app pub date -
Apr 30, 1990
filing date -
Mar 24, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Cited Art Landscape
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