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445 条记录 (耗时 0.025 秒)

    X-RAY IMAGING OF AN OBJECT WITH THREE-DIMENSIONAL LOCALIZATION OF AN INTERVENTIONAL DEVICE
    5.
    发明公开
    X-RAY IMAGING OF AN OBJECT WITH THREE-DIMENSIONAL LOCALIZATION OF AN INTERVENTIONAL DEVICE 审中-公开

    公开(公告)号：EP3355794A1

    公开(公告)日：2018-08-08

    申请号：EP16774488.7

    申请日：2016-09-29

    申请人： Koninklijke Philips N.V.

    发明人： SCHAEFER, Dirk ,  GRASS, Michael ,  KOEHLER, Thomas

    IPC分类号： A61B6/12 ,  A61B6/00

    CPC分类号： A61B6/12 ,  A61B6/4035 ,  A61B6/4291 ,  A61B6/461 ,  A61B6/484 ,  A61B6/547

    摘要： The invention relates to an X-ray apparatus (10) and a method (64) for a depth localization of a catheter (12) within an object of interest (22), arranged at an object receiving space (14) of the X-ray imaging apparatus. The X-ray imaging apparatus comprises an X-ray source (16) and an X-ray detector (20). Between the X-ray source and the X-ray detector, at least one interferometer (24) formed by a phase grating is arranged. The X-ray detector is configured to detect X-ray radiation, which has been influenced by the phase grating and the object of interest and the catheter, which may also be arranged at the object receiving space and/or the object of interest. The X-ray detector is configured to provide a detector signal s. A signal component of the detector signal relates to a phase-contrast detector signal component, which may be calculated on the basis of the detector signal and may represent a visibility loss. It has been found, that a repective visibility loss signal component of the detector signal depends on a distance between the catheter and the phase grating. Accordingly, depth information for the catheter may be calculated on the basis of the visibility loss signal component of the detector signal. Correspondingly, a three-dimensional position of the catheter at the object receiving space may be calculated. It is to be noted, that the catheter may just be one example of an interventional device, which may be arranged at the object receiving space. As an effect, a three-dimensional tracking of the interventional device, in particular of the catheter, may be enabled from the X-ray detector signal.

    Medical imaging method varying collimation of emitted radiation beam
    6.
    发明授权
    Medical imaging method varying collimation of emitted radiation beam 有权

    公开(公告)号：EP2810600B1

    公开(公告)日：2018-08-08

    申请号：EP13305755.4

    申请日：2013-06-05

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Trousset, Yves ,  Riddell, Cyril

    IPC分类号： A61B6/06 ,  A61B6/00 ,  A61B6/10

    CPC分类号： A61B6/06 ,  A61B6/107 ,  A61B6/4021 ,  A61B6/4035 ,  A61B6/4441

    摘要： This invention relates to a medical imaging method comprising: emitting (S1) a radiation beam from a radiation source of a rotating gantry, preferably of a rotating C-arm, on a volume of interest, varying collimation (S2, S7) of said emitted radiation beam so as to change at least part-time a field of view of said emitted radiation beam so that there are at least a first part and a second part of said volume of interest such that, when said first part of said volume of interest is imaged, said second part of said volume of interest is shuttered, and when said second part of said volume of interest is imaged, said first part of said volume of interest is shuttered.

    DIFFERENTIAL PHASE-CONTRAST IMAGING WITH IMPROVED SAMPLING
    9.
    发明授权
    DIFFERENTIAL PHASE-CONTRAST IMAGING WITH IMPROVED SAMPLING 有权
    差分相位对比成像与改进的采样

    公开(公告)号：EP2611364B1

    公开(公告)日：2018-03-07

    申请号：EP11760576.6

    申请日：2011-08-26

    申请人： Koninklijke Philips N.V. ,  Philips Intellectual Property & Standards GmbH

    发明人： KOEHLER, Thomas

    IPC分类号： A61B6/03 ,  G01N23/04 ,  G01N23/20 ,  A61B6/00 ,  G21K1/02 ,  G21K1/06

    CPC分类号： G21K1/067 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4291 ,  A61B6/484 ,  G01N23/04 ,  G21K1/02 ,  G21K2207/005

    摘要： The present invention relates to differential phase-contrast imaging of an object. For increasing spatial resolution of an X-ray imaging system (2) the size of a detector pixel element (8) may be considered a limiting factor. Accordingly, it may be beneficial to increase the resolution of an apparatus (38) for phase-contrast imaging without further reducing the area of an individual pixel element (8). Accordingly, an apparatus (38) for phase-contrast imaging with improved sampling is provided, comprising an X-ray source (4), a first grating element G1 (24), a second grating element G2 (26) and an X-ray detector element (6) comprising a plurality of detector pixel elements (8), each detector pixel element (8) having a pixel area A. An object to be imagined (14) is arrangeable between the X-ray source (4) and the X-ray detector element (6). The first grating element G1 (24) as well as the second grating element G2 (26) are arrangeable between the X-ray source (4) and the X-ray detector element (6). The X-ray source (4), the first grating element G1 (24), the second grating element G2 (26) and the X-ray detector (6) are operatively coupled for acquisition of a phase-contrast image of the object (14). At least one of the first grating element G1 (24) and the second grating element G2 (26) comprise a first area A1 having a first grating pitch p1 and a second area A2 having a second grating pitch p2 different from the first grating pitch.