X-ray or gamma ray systems or devices – Accessory – Testing or calibration
Patent
1988-07-13
1990-12-25
Howell, Janice A.
X-ray or gamma ray systems or devices
Accessory
Testing or calibration
2502521, G01D 1800
Patent
active
049809040
ABSTRACT:
An apparatus and method is disclosed for facilitating calibration of a dual energy digital radiography system having a focused multi-element detector assembly. The apparatus includes two sets of calibration elements, each set made of a different basis material. Each calibration element defines a segment of an annulus and is positionable between the system source and detector such that the center defined by the annulus is substantially coincident with the focal spot of the source. Within individual sets, the thicknesses of the respective member elements differ one from another in accordance with a binary progression. Each of the calibration elements is positioned and sized such that it intercepts and attenuates all radiation which ultimately falls upon the detector.
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Lauro Karen L.
Mattson Rodney A.
Sones Richard A.
Freeman John C.
Howell Janice A.
Picker International Inc.
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