X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1985-10-25
1987-06-09
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378149, 378158, H01J 3516, G21K 102
Patent
active
046726489
ABSTRACT:
An off-focal radiation collimator is disclosed which includes a plurality of radiation absorbing elements supported in spaced relationship with respect to one another in a housing such that each element is aligned along radii extending from the focal spot of a radiation source. The off-focal collimator is preferably disposed between the radiation source and a primary beam collimator. The off-focal collimator also acts as a radiation beam compensator. By varying the spatial density of the radiation absorbing elements by a function of location within the housing, the radiation beam can be shaped to any desired profile.
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DeMeester Gordon D.
Mattson Rodney A.
Fields Carolyn E.
Gurin Timothy B.
Hannaher Constantine
Picker International Inc.
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