X-ray or gamma ray systems or devices – Accessory – Testing or calibration
Patent
1989-10-06
1991-10-08
Howell, Janice A.
X-ray or gamma ray systems or devices
Accessory
Testing or calibration
378 18, 2502521, G01D 1800
Patent
active
050561308
ABSTRACT:
A set of interchangeable pieces comprising a computerized tomography calibrator, and a method of use thereof, permits focusing of a computerized tomographic (CT) system. The interchangeable pieces include a plurality of nestable, generally planar mother rings, adapted for the receipt of planar inserts of predetermined sizes, and of predetermined material densities. The inserts further define openings therein for receipt of plural sub-inserts. All pieces are of known sizes and densities, permitting the assembling of different configurations of materials of known sizes and combinations of densities, for calibration (i.e., focusing) of a computerized tomographic system through variation of operating variables thereof. Rather than serving as a phanton, which is intended to be representative of a particular workpiece to be tested, the set of interchangeable pieces permits simple and easy standardized calibration of a CT system. The calibrator and its related method of use further includes use of air or of particular fluids for filling various openings, as part of a selected configuration of the set of pieces.
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Adams Harold Wallace
Howell Janice A.
Manning John R.
Sheehan William J.
The United States of America as represented by the Administrator
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