X-ray or gamma ray systems or devices – Beam control – Collimator
Patent
1991-11-06
1993-04-20
Church, Craig E.
X-ray or gamma ray systems or devices
Beam control
Collimator
378150, G21K 104
Patent
active
052048926
ABSTRACT:
A primary radiation diaphragm for an x-ray tube has a first group of diaphragm plates disposed proximate the focus of the x-ray tube, and a second group of diaphragm plates disposed distal of the focus. Each group of diaphragm plates consists of two diaphragm plate pairs, the plate pairs in each group forming a parallelogram. The diaphragm plates in each plate pair are adjustable together, with reference to the longitudinal axis of the overall radiation diaphragm structure by a control element, so that a ray pyramid having a desired size is formed. A single first shaft is used as a control element for simultaneously adjusting the diaphragm plates in one plate pair in the first group and one plate in the second group, the first shaft engaging each of the plates in these respective plate pairs for that purpose. A second single shaft engages the diaphragm plates in the other plate pair in the first group and the other plate pair in the second group, for simultaneously adjusting those plate pairs.
REFERENCES:
patent: 1909118 (1933-05-01), Raab
patent: 3048700 (1962-08-01), Koerner et al.
patent: 4158779 (1979-06-01), Rommel et al.
patent: 4943990 (1990-07-01), Schar
Siemens Brochure for RUREK X-Ray Collimator.
Church Craig E.
Siemens Aktiengesellschaft
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