X-ray or gamma ray systems or devices – Source – Electron tube
Patent
1996-04-02
1997-10-21
Wong, Don
X-ray or gamma ray systems or devices
Source
Electron tube
378138, 378121, 378 10, H01J 3530
Patent
active
056804326
ABSTRACT:
In an apparatus and a method for generating an x-ray beam circulating through a polar angle .phi. of 2.pi. that enables fast computed-tomographic scans is to be generated, an electron beam is generated with a predetermined energy and is injected into a beam guide that guides the electron beam on a spiral path in a plane by means of an axial magnetic field. At a location selectable in the .phi.-direction, the electron beam is deflected perpendicularly to the plane and onto an essentially annular anode arrangement, so that, proceeding from the point of incidence of the electron beam, x-rays directed onto the center of the anode arrangement are generated. For a scan, the selectable location at which the electron beam is deflected out of the plane is advanced along the spiral path, so that the point of incidence of the electron beam onto the anode arrangement advances correspondingly.
REFERENCES:
patent: 5172401 (1992-12-01), Asari et al.
patent: 5197088 (1993-03-01), Vincent et al.
patent: 5504791 (1996-04-01), Hell et al.
Siemens Aktiengesellschaft
Wong Don
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