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    DEVICE AND METHOD FOR PHASE STEPPING IN PHASE CONTRAST IMAGE ACQUISITION
    28.
    发明公开
    DEVICE AND METHOD FOR PHASE STEPPING IN PHASE CONTRAST IMAGE ACQUISITION 审中-公开

    公开(公告)号：EP3558126A1

    公开(公告)日：2019-10-30

    申请号：EP18759295.1

    申请日：2018-08-22

    申请人： Koninklijke Philips N.V.

    发明人： ROESSL, Ewald

    IPC分类号： A61B6/00 ,  G01N23/20 ,  G02B7/00 ,  G02B5/18 ,  G02B26/08 ,  G02B27/52 ,  G21K1/04 ,  G21K1/06

    摘要： The present invention relates to a device for phase stepping in phase contrast image acquisition, the device (1) comprising: a mobile grating (10); a guiding element (11); a restoring element (12); and a locking element (13); wherein the guiding element (11) is configured to guide the mobile grating (10) between a first position (2) and a second position (3); wherein the restoring element (12) is configured to apply a force to the mobile grating (10); wherein the force is directed from the first position (2) to the second position (3); and wherein the locking element (13) is configured to releasably lock the mobile grating (10) in the first position (2). In an example, during the motion of the mobile grating (10) back to equilibrium, a decoder (11a) for the position of the mobile grating (10) along the guiding element (11) may trigger at least four measurement frames over a period of at least 2*Pi. The invention provides a device (1) for phase stepping in phase contrast image acquisition which provides a fast image acquisition without a significant delay and which reduces positional inaccuracies and which avoids back-lash.

    X-RAY IMAGING DATA PROCESSING DEVICE AND METHOD
    29.
    发明公开
    X-RAY IMAGING DATA PROCESSING DEVICE AND METHOD 审中-公开

    公开(公告)号：EP3442423A1

    公开(公告)日：2019-02-20

    申请号：EP18718705.9

    申请日：2018-03-23

    申请人： Koninklijke Philips N.V.

    发明人： BARTELS, Mattias ,  KOEHLER, Thomas ,  ROESSL, Ewald

    IPC分类号： A61B6/00

    CPC分类号： A61B6/484 ,  A61B6/583

    摘要： The invention is related to processing x-ray imaging data, specifically phase contrast x-ray imaging data, and addresses the problems associated, for example, with vibrations in grating-based differential phase contrast imaging by making use of spectral information. It was realized that one may make use of the spectral information in determining the vibration state of the Moire pattern based on multi-energy-bin x-ray detectors, the energy independence of vibration-induced Moire pattern phase shifts, the energy dependence of object-induced Moire pattern phase shifts and a phantom designed to allow for measuring the dependence of the object-induced phase shift as a function of the energy bin. In particular, it was found that by suitable data processing the vibration-induced shifts and the like can be disentangled from the object properties and hence vibration artifacts in the image are reduced, while there is no particular need for changing the basic physical structure of the imaging device.

    MODIFICATION ARRANGEMENT FOR AN X-RAY GENERATING DEVICE
    30.
    发明授权
    MODIFICATION ARRANGEMENT FOR AN X-RAY GENERATING DEVICE 有权

    公开(公告)号：EP3204959B1

    公开(公告)日：2018-11-21

    申请号：EP15780793.4

    申请日：2015-09-30

    申请人： Koninklijke Philips N.V.

    发明人： BEHLING, Rolf Karl Otto ,  ROESSL, Ewald

    IPC分类号： H01J35/14 ,  H01J35/24

    CPC分类号： H01J35/10 ,  H01J35/06 ,  H01J35/14 ,  H01J35/24 ,  H01J2235/086

    摘要： The invention relates to a modification arrangement for an X-ray generating device, a modification method, a computer program element for controlling such device and a computer readable medium having stored such computer program element. The modification arrangement comprises a cathode, an anode (2) and modification means, e.g. a modification device. The cathode is configured to provide an electron beam (15). The anode (2) is configured to rotate under impact of the electron beam (15) and is segmented by slits (21) arranged around the anode's circumference. The modification means are configured to modify the electron beam (15) when the electron beam (15) is hitting one of the anode's rotating slits (21).