X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1982-11-22
1985-12-17
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378207, 250367, 250385, G03B 4116
Patent
active
045596395
ABSTRACT:
An x-ray detector includes a first array of radiation detecting cells for detecting a planar radiation beam transmitted through an object undergoing examination, and a second array of detector cells for detecting radiation transmitted past the object without substantial attenuation. A cell in the second array is modified so that the fraction of the incident radiation admitted into the cell for detection is dependent on the position of a beam of x-ray radiation on its radiation-receiving aperture. Analysis of the signal outputs of the modified cell and an unmodified cell yields the position of the x-ray beam on the aperture. Knowledge of the beam position is useful in a method for compensating for the height-dependent detector sensitivity in, for example, a computerized tomography apparatus.
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Glover Gary H.
Kerwin Edward M.
Church Craig E.
General Electric Company
Gerasimow Alexander M.
Stoner Douglas E.
Wieland Charles F.
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