X-ray or gamma ray systems or devices – Beam control – Collimator
Patent
1985-03-18
1987-06-23
Church, Craig E.
X-ray or gamma ray systems or devices
Beam control
Collimator
378145, 378147, 378150, 378153, 378146, G21K 104
Patent
active
046758933
ABSTRACT:
An apparatus for slit radiography comprising an X-ray source by means of which a body being irradiated can be scanned through a slit diaphragm by a substantially planar, fan-shaped X-ray beam, the scanning X-ray beam passed through the body impinging upon an X-ray detector. The apparatus comprises controllable attenuation elements coacting with the slit diaphragm, each element being adapted to influence a sector of the scanning X-ray beam under the control of signals generated by a radiation detector device. The radiation detector device is disposed between the body being irradiated and the X-ray detector. The radiation detector device comprises at least one radiation detector extending at any moment into the scanning X-ray beam passed through the body and moving in synchronism with the scanning movement of the X-ray beam. The radiation detector device is divided into sections corresponding with the sectors of the scanning X-ray beam influenceable by the attenuation elements, while, in operation, each section of the radiation detector device generates a signal usable for controlling the attenuation elements.
REFERENCES:
patent: 1164987 (1915-12-01), Bucky
patent: 3101407 (1963-08-01), Shipman, Jr.
patent: 3755672 (1973-08-01), Edholm et al.
patent: 4132895 (1979-01-01), Froggatt
patent: 4442538 (1984-04-01), Haendle
patent: 4547893 (1985-10-01), Gordon
Duinker Simon
Vlasbloem Hugo
Church Craig E.
Freeman John C.
Marn Louis E.
N.V. Optische Industrie "De Oude Delft"
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