Abstract:
The present invention provides for an improved scanning process with a stationary X- ray source arranged to generate X-rays from a plurality of X-ray source positions around a scanning region, a first set of detectors arranged to detect X-rays transmitted through the scanning region, and at least one processor arranged to process outputs from the first set of detectors to generate tomographic image data. The X-ray screening system is used in combination with other screening technologies, such as NQR-based screening, X-ray diffraction based screening, X-ray back-scatter based screening, or Trace Detection based screening.
Abstract:
A dose-modulated irradiating system includes an x-ray tube (20) with at least a filament (80) for generating electrons, a cathode (84) and an anode (92) for accelerating and collimating the generated electrons into an electron beam (94), and an electrostatic grid with grid electrodes (110, 112) for steering the electron beam (94) on the anode (92). The anode (92) generates an x-ray beam (96) responsive to the electron beam (94). Grid biasing is provided for applying a time-varying electrical bias to the grid electrodes (110, 112)that produces a first time-varying intensity modulation of the electron beam (94). A current of the filament (80) is modulated to produce a second time-varying intensity modulation of the electron beam (94). A controller (52) controls cooperatively combining the first and second time-varying intensity modulations to produce a combined time-varying intensity modulation.
Abstract:
Provided is an X-ray device that is equipped with: a target that generates X-rays as electrons collide therewith or pass therethrough; a filament that emits the electrons to the target; a housing that has the filament therein; and a first holding member that holds, on the outside of the housing, the portion of the target disposed outside the housing.
Abstract:
An X-ray imaging system includes an X-ray generator (100) including a plurality of X-ray generation units (100a), where the plurality of X-ray generation units is two-dimensionally arranged, and operates independently of each other; and an X-ray detector (200) spaced apart from the X-ray generator, where the X-ray detector includes a plurality of X-ray detection units corresponding to the plurality of X-ray generation units, where a space is defined between the X-ray generator and the X-ray detector.
Abstract:
A transmissive-type target includes a target layer (22), and a transmissive substrate (21) configured to support the target layer. The transmissive substrate has a pair of surfaces (24,25) facing each other and is formed of polycrystalline diamond. In the transmissive substrate, one of the pair of surfaces includes polycrystalline diamond having a first average crystal grain diameter which is smaller than a second average crystal grain diameter of polycrystalline diamond included on the other surface opposing thereto. The target layer is supported by any one of the pair of surfaces.
Abstract:
An X-ray imaging system includes an X-ray generator (100) including a plurality of X-ray generation units (100a), where the plurality of X-ray generation units is two-dimensionally arranged, and operates independently of each other; and an X-ray detector (200) spaced apart from the X-ray generator, where the X-ray detector includes a plurality of X-ray detection units corresponding to the plurality of X-ray generation units, where a space is defined between the X-ray generator and the X-ray detector.
Abstract:
An X-ray generator comprises a cathode electrode 15, a grid electrode 17 for controlling an electron beam e generated by this cathode electrode 15, a focus electrode 18 for focusing the electron beam e, and an anode target 14 for emitting X rays by the collision of the electron beam e. A bias voltage Vb is impressed between the cathode electrode 15 and the grid electrode 17 from a bias voltage generating section 20. A tubular voltage Vt is impressed on the anode target 13 from a tubular voltage generating section 19. A voltage dividing section 31 divides the tubular voltage Vt to generate a focus voltage Vf. The effect of a variation in voltage on the formation of a focus of an electron beam is suppressed by impressing such a focus voltage Vf on the focus electrode 18.