• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE1100196A1
    申请号:SE1100196
    申请日:2011-03-17
    公开日:2012-09-18
    发明作者:Jan Narfstroem；Stig Landstroem
    申请人:
    IPC主号:
    专利说明:

    These and other objects are achieved by an X-ray grid holder according to the characterizing parts of the independent claim.
    Summary of the invention The invention relates to a screen holder for cylindrical bending of an X-ray screen 15, wherein the screen holder supports the X-ray screen with support elements 5a-b, 7a-b, 8a-b, 9a-b, 10a-b arranged along five separated, parallel guide lines 14a -e. Movable support members 8a-b along the central guide line 14c are arranged to be raised when movable support members 9a-b, 10a-b are lowered along the outermost guide lines 14a-b, while fixed support members Sa-b, 7a-b along the two remaining guide lines are fixed . With support elements distributed over five guide lines, the grid can be made to precisely follow a desired cylindrical curvature.
    In a particularly advantageous embodiment, the movable support elements 8a-b, 9a-b, 10a-b are movably arranged along the sides of the grid holder and are provided with devices 23 for effecting raising or lowering of the grid when the movable support elements are displaced along the edges of the grid holder. The devices 23 for effecting raising or lowering of the grid can consist of inclined grooves 23 on the movable support elements, where the grooves are designed to cooperate with pins 16a-b, 17a-b, 18a-b on the grid.
    In a further advantageous embodiment, the movable support elements 8a-b, 9a-b, 10a-b are mechanically coupled to each other, so that all the movable support elements move simultaneously. The fixed support elements 5a-b, 7a-b can consist of opposite strips on the bottom and lid of the grid holder.
    Brief description of the figures Fig. 1 shows the bottom and lid of the X-ray screen holder without screen Fig. 2 shows the bottom and lid of the X-ray screen holder Fig. 3 shows the X-ray screen Fig. 4 shows a translation unit Fig. 5 shows part of the X-ray screen holder frame with a corner wheel Description of a preferred embodiment Fig. 1 shows the bottom 1 and lid 2 of the X-ray screen holder without a screen. The bottom comprises a rectangular frame 3 arranged on a rectangular bottom plate 4. Over the bottom plate, two bottom strips Sa-b extend parallel to each other. The bottom strips are arranged a distance corresponding to approximately a quarter of the side of the bottom plate from the respective opposite side of the frame. The lid comprises a lid plate 6 over which two lid strips 7a-b extend parallel to each other. The lid plate is fastened on top of the frame so that the lid strips are arranged directly above the bottom strips and the lid strips are correspondingly arranged a distance corresponding to approximately a quarter of the side of the lid plate from the respective opposite side of the lid plate. With the lid mounted on the bottom, there is a gap between the strips on the lid and the bottom that is selected so that the grid can be placed between the strips.
    Along the inside of the frame there are six translation units 8a-b, 9a-b, 10a-b arranged, two pieces 8a-b near the middle of a first pair of opposite sides l2a-b and four pieces 9a-b, 10a-b on the second pair opposite sides l3a-b. The four translation units 9a-b, 10a-b on the opposite pair of opposite sides are arranged approximately a distance approximately corresponding to one third of the length of the other side from the respective end of the other side. All the translation units are arranged to be able to move along the sides to which they are mounted in grooves.
    The movement is effected by means of a control unit 11 which projects one of the translation units and all the translation units are connected to each other via a wire so that they move synchronously with each other.
    Diagonally across the fronts of the six translation units, i.e. the sides facing inwards, extend grooves which receive six corresponding pins on the X-ray grating. As the translation units are displaced along the sides of the frame, the pins on the X-ray grating are correspondingly displaced up or down, so that the grating is bent in an arc parallel to one side of the grating.
    Fig. 2 shows the bottom and lid of the X-ray grating holder with the X-ray grating 15 mounted in the bottom.
    The grid is thus held in the figure at six points around its periphery, where the pins of the grid run into the grooves of the translation units. The six axing points are distributed over three parallel, movable guides 14a-c, where two outer movable guides 14a-b lie immediately adjacent and run parallel to the first pair of opposite sides 12a-b of the frame and the third, central movable line 14c extends between it. the second pair of opposite sides l3a-b midpoints.
    In addition to the three movable parallel lines, the grid is held in position along two further fixed guide lines 14d-e which consist of the bottom and lid strips 5a-b, 7a-b. The bottom and lid strips also run parallel to the movable guides and the strips are arranged on either side of the middle movable guide and within the outermost movable guides.
    When the control unit displaces all the translation units, the movable guides are translated up and down, respectively, depending on the direction in which the displacement takes place and depending on the direction in which the diagonal grooves in the translation units are arranged. To bend the raster to a convex shape, all the translation units are shifted counterclockwise. In such a counterclockwise movement, the two outer movable guide lines are lowered against the base plate 4, the central movable guide line is raised from the base plate and the two fixed guide lines remain in position. The grid is then forced to assume a convex cylindrical shape defined by all five guide lines 14a-e. In order to prevent the shape of the grid from having an injection point at the two fixed guide lines 14d-e, which could have been the case if the lists had had flat upper surfaces, the lists are rounded in cross section with a steep top.
    To bend the raster to a concave shape, all the translation units are shifted clockwise. In such a clockwise movement, the two outer movable guide lines are raised from the base plate 4, the center movable guide line is lowered towards the base plate and the two fixed guide lines remain in position. The raster is then forced to assume a concave cylinder shape defined by all five guide lines 14a-e. Because the cylinder shape is defined by as many as five guide lines, a well-defined shape is obtained and the grid is kept well in position so that it cannot be shaken or displaced.
    Fig. 3 shows the X-ray grating 15 with its six pins 16a-b, 17a-b, 18a-b. Two pins 16a-17a are arranged on one of a first pair of opposite sides and two further pins 16b-17b are arranged on the other of the first pair of opposite sides of the grid. These four pins cooperate with the translation units 12a-b, 13a-b along the first pair of opposite sides of the frame. Two pins 18a-b are arranged in the middle of two other opposite sides and these cooperate with the translation units 8a-b on the other opposite sides of the frame.
    F ig. 4 shows a translation unit 8b which is displaced by the control unit 11. The control unit comprises a motor 21 which rotates a screw 19 extending through an internally threaded hole through the translation unit. The figure also illustrates the track diagonally across the translation unit receiving a pin on the grid. A wire 20 is connected to the translation unit and extends from it in both directions. Vajem is connected to all translation units and extends all the way around the inside of the frame.
    Fig. 5 shows part of the frame of the X-ray grating holder with a corner wheel 22 around which the wire 20 is arranged. Corresponding, easily rotatable corner wheels are arranged in all four corners of the frame so that the wheel can displace all the translation units in a synchronous manner.
    权利要求:
    Claims (5)
    [1]
    A grating holder for cylindrical bending of an X-ray grating (15), wherein the grating holder supports the X-ray grating with support elements (Sa-b, 7a-b, 8a-b, 9a-b, 10a-b) arranged along five spaced apart, parallel guide lines (14a-e), characterized in that movable support members (8a-b) along the central guide line (14c) are arranged to be raised when movable support members (9a-b, 10a-b) along the outermost guide lines (14a-b) is lowered, while fixed support elements (Sa-b, 7a-b) along the two remaining guide lines are fixed.
    [2]
    A grid holder according to claim 1, characterized in that the movable support elements (8a-b, 9a-b, 10a-b) are movably arranged along the sides of the grid holder and are provided with devices (23) for effecting raising or lowering of the grid when they movable support elements are displaced along the edges of the grid holder.
    [3]
    A grid holder according to claim 2, characterized in that the devices (23) for effecting raising or lowering of the grid consist of inclined grooves (23) on the movable support elements, the grooves being designed to cooperate with pins (16a-b, 17a). b, 18a-b) on the grid.
    [4]
    A grid holder according to any one of the preceding claims, characterized in that the movable support elements (8a-b, 9a-b, 10a-b) are mechanically coupled to each other, so that all the movable support elements move simultaneously.
    [5]
    A grid holder according to one of the preceding claims, characterized in that the fixed support elements (Sa-b, 7a-b) consist of opposite strips on the bottom and lid of the grid holder.
    类似技术:
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    同族专利:
    公开号 | 公开日
    WO2012125086A1|2012-09-20|
    EP2710609A1|2014-03-26|
    EP2710609A4|2014-12-03|
    EP2710609B1|2017-07-19|
    SE535571C2|2012-09-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2801671A|1955-08-29|1957-08-06|Westinghouse Electric Corp|Manufacture of X-ray apparatus|
    US5291539A|1992-10-19|1994-03-01|General Electric Company|Variable focussed X-ray grid|
    DE4305475C1|1993-02-23|1994-09-01|Siemens Ag|Scattered radiation grid for an X-ray diagnostic device|
    JP2001188098A|1999-12-28|2001-07-10|Rigaku Corp|X-ray beam regulator and x-ray device|
    SE520527C2|2002-04-30|2003-07-22|Arcoma Ab|Holder for x-ray raster in medical x-ray diagnosis system, includes two parts for bending raster into positions with short and long film focal distances|
    ITMI20021763A1|2002-08-02|2004-02-03|Mecall S R L|DEVICE FOR ADJUSTING THE ANTI-DIFFUSION GRID TO THE FOCAL DISTANCE FOR RADIOLOGICAL EQUIPMENT|
    JP2004313546A|2003-04-17|2004-11-11|Shimadzu Corp|X-ray photographing device|
    DE102006037256B4|2006-02-01|2017-03-30|Paul Scherer Institut|Focus-detector arrangement of an X-ray apparatus for producing projective or tomographic phase contrast recordings and X-ray system, X-ray C-arm system and X-ray CT system|
    JP4598793B2|2007-03-29|2010-12-15|株式会社トプコン|Method of deflecting collimator mirror in illumination optical system of exposure apparatus and illumination optical system of exposure apparatus by the method|JP6396472B2|2013-12-17|2018-09-26|コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ．|Phase recovery for scanning differential phase contrast systems|
    EP3403581A1|2017-05-15|2018-11-21|Koninklijke Philips N.V.|Grid-mounting device for slit-scan differential phase contrast imaging|
    法律状态:
    2019-10-29| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1100196A|SE535571C2|2011-03-17|2011-03-17|Holder for cylindrical curvature of an X-ray grid|SE1100196A| SE535571C2|2011-03-17|2011-03-17|Holder for cylindrical curvature of an X-ray grid|
    EP11860754.8A| EP2710609B1|2011-03-17|2011-12-16|Holder for cylindrical bending of an x-ray grid|
    PCT/SE2011/000231| WO2012125086A1|2011-03-17|2011-12-16|Holder for cylindrical bending of an x-ray grid|
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