Apparatus for slit radiography
Patent 4715056 Issued on December 22, 1987. Estimated Expiration Date: 
March 18, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 18, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2996267 3101407 3402292 3660664 3755672 Radiography Radiographic system X-Ray Diagnostic installation Patent #: 4442538 InventorsApplicationNo. 06/713198 filed on 03/18/1985US Classes:378/152, With linear leaf motion378/145, BEAM CONTROL378/146, Scanner378/147, Collimator378/150, Variable378/153With pivotal leaf motionExaminersPrimary: Church, Craig E.Assistant: Freeman, John C. Attorney, Agent or FirmInternational ClassesG21K 1/02 (20060101)H05G 1/64 (20060101) H05G 1/60 (20060101) H05G 1/36 (20060101) H05G 1/00 (20060101) A61B 6/03 (20060101) A61B 6/06 (20060101) G21K 1/04 (20060101) Foreign Application Priority Data1984-03-16 NLAbstractAn apparatus for slit radiography comprising an X-ray source, an X-ray detector positioned behind a body being irradiated, said detector collecting the radiation passed through the body, and a slit diaphragm placed between the X-ray source and the body being irradiated, through which diaphragm there is formed a planar X-ray fan beam, while for obtaining a complete X-ray shadow image of the desired part of the body at least the fan beam performs a scanning movement. There are provided detection means coacting with the X-ray detector and comprising a plurality of sections juxtaposed in the longitudinal direction of the strip-like portion of the X-ray detector irradiated through the slit diaphragm, each section being adapted to produce an electric signal depending upon the radiation impinging instantaneously on the associated section of the X-ray detector. The slit diaphragm comprises a plurality of sections juxtaposed in the longitudinal direction of the slit, each coacting with at least one controllable attenuation element and corresponding with the number of sections of the detection means, and is provided with control means which during the scanning movement instantaneously and simultaneously adjust the quantity of X-rays passed per section of the diaphragm, under the control of the electric signals generated by the detection means.Other References
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