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Apparatus for phase-contrast imaging comprising a displaceable x-ray detector element and method

The present invention relates to X-ray image acquisition technology in general. Employing phase-contrast imaging for X-ray image acquisition may significantly enhance the quality and information content of images acquired. However, phase-contrast information may only be obtainable in a small detector region, possibly being too small for a sufficient field of rotation view for specialized X-ray imaging applications. Accordingly, an apparatus for phase-contrast imaging is provided that may allow the acquisition of an enlarged field of view. According to the present invention an apparatus (1) for phase-contrast imaging is provided, comprising an X-ray source (2), an X-ray detector (12) element having a detector size, a beam splitter grating (8) and an analyzer grating (10). An object (6) is arrangeable between the X-ray source (2) and the X-ray detector (12). The beam splitter grating (8) and the analyzer grating (10) are arrangeable between the X-ray source (2) and the X-ray detector (12). X-ray source (2), the beam splitter grating (8), the analyzer grating (10) and the X-ray detector (12) are operatively coupled such that a phase-contrast image of the object (6) is obtainable. The apparatus (1) is adapted for acquiring a phase-contrast image having a field of view larger than the detector size. The X-ray detector element (12) is displaceable and by the displacement of the X-ray detector (12) a phase-contrast image of the field of view is obtainable.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV

Shot peening strengthening device for high-speed train wheel

The invention discloses a shot peening strengthening device for a high-speed train wheel. The shot peening strengthening device comprises a shot-blast room, three shot blasters, a shot separation and recovery device, a shot storage and supply device, a dust removal device, a rotary worktable and a clamp, wherein the rotary worktable is positioned on one side of the shot-blast room and provided with two clamp worktables symmetrically arranged along the diameter; each clamp worktable can be equipped with six train wheel workpieces and rotates in a shot-blast process for strengthening the train wheel surface to be uniform; the rotary worktable can intermittently rotate and rotate 180 degrees each time; the three shot blasters are connected with six blast guns, and each blast gun corresponds to one train wheel workpiece; the shot separation and recovery device comprises a shot lifting machine and a shot separator, and is used for lifting and separating shots; the dust removal device is a dust remover, and the air suction hole of the dust removal device is connected with the shot separator and an air suction hole in the top end of the shot-blast room to guarantee indoor visibility and keep a certain negative pressure in the room. A shot-blast machine is high in processing efficiency and reliable in working.
Owner:UNIV OF JINAN
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