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    X-ray imaging device
    31.
    发明授权
    X-ray imaging device 有权

    公开(公告)号：US10368815B2

    公开(公告)日：2019-08-06

    申请号：US15325551

    申请日：2015-07-07

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Thomas Koehler ,  Ewald Roessl

    IPC: A61B6/00 ,  A61B6/06 ,  G01N23/083 ,  A61B6/04

    Abstract: The invention relates to X-ray imaging. In order to improve flexibility, for example in relation with phase-contrast imaging, the X-ray imaging device (10) comprises an X-ray source arrangement for providing an X-ray beam (11). Further, it is provided at least one grating (13, 14) and a line detector (15) with a plurality of sensor lines, which sensor lines are each provided by a plurality of sensor elements, and which sensor lines are provided for detecting respective portions of the X-ray beam (11) passing the at least one grating during operation. The X-ray imaging device is arranged for moving the line detector (15) and an object (21) to be imaged relative to each other, such that in response to the portions of the X-ray beam a number of interference patterns are detectable at respective different relative positions of the line detector and the object for reconstructing an image of the object (21). The at least one grating (13, 14) comprises at least one first segment (161) and at least one second segment (162) arranged adjacent to each other in a direction perpendicular to the direction of the line detector (15). The X-ray imaging device is arranged for moving the line detector (15) and the at least one grating relative to each other between at least a first relative position and a second relative position, such that in the first relative position, a portion of the X-ray beam (11) during operation passes through the at least one first segment (161), while the at least one second segment (162) is arranged outside said portion of the X-ray beam (11), and that in the second relative position, said portion of the X-ray beam (11) during operation passes through the at least one second segment (162), while the at least one first segment (161) is arranged outside said portion of the X-ray beam (11).

    Dark current compensation
    32.
    发明授权
    Dark current compensation 有权

    公开(公告)号：US10267928B2

    公开(公告)日：2019-04-23

    申请号：US15776096

    申请日：2016-11-23

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roger Steadman Booker ,  Ewald Roessl

    IPC: G01T1/24

    Abstract: The present invention is directed towards a photon counting radiation detector (10) comprising an array of pixels (13) comprising a plurality of detection pixels (131) for detecting imaging information. At least one pixel of the array of pixels (132) is shielded from receiving radiation. A dark current is determined from the shielded pixel (132) and is used to compensate for dark current in the other, non-shielded pixels (131). Embodiments are directed to integrating pixel shielding within an Anti Scatter Grid or in a mask.

    Differential phase contrast imaging device with movable grating(s)
    36.
    发明授权
    Differential phase contrast imaging device with movable grating(s) 有权

    公开(公告)号：US09649082B2

    公开(公告)日：2017-05-16

    申请号：US14438947

    申请日：2014-09-16

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Hans-Aloys Wischmann ,  Ewald Roessl

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

    CPC classification number: A61B6/484 ,  A61B6/03 ,  A61B6/06 ,  A61B6/4035 ,  A61B6/4078 ,  A61B6/4208 ,  A61B6/4291 ,  A61B6/4435 ,  A61B6/502 ,  A61B6/547 ,  A61B6/585 ,  G21K1/025 ,  G21K1/06 ,  G21K2207/005

    Abstract: An X-ray differential phase contrast imaging device (10) comprises an X-ray source (20) for generating an X-ray beam; a source grating (G0) for generating a coherent X-ray beam from a non-coherent X-ray source (20); a collimator (22) for splitting the coherent X-ray beam into a plurality of fan-shaped X-ray beams (28) for passing through an object (14); a phase grating (G1) for generating an interference pattern and an absorber grating (G2) for generating a Moiré pattern from the interference pattern arranged after the object (14); and a line detector (24) for detecting the Moiré pattern generated by the phase grating (G1) and the absorber grating (G2) from the fan-shaped X-ray beams (28) passing through the object (14). The X-ray source (20), source grating (G0), collimator (22), phase grating (G1), absorber grating (G2) and line detector (24) are fixed to a common gantry (12) and are movable with respect to the object (14), such that a number of interference pattern from different positions of the gantry are detectable for reconstructing a differential phase image of the object (14). At least one grating (G0, G1, G2) comprises, in an alternating manner, groups (36) of grating lines (34) and transparent areas (38). At least one grating (G0, G1, G2) is movable with respect to the gantry (12), such that in a first position of the grating (G1, G2) the fan-shaped X-ray beams (28) pass through the grating lines (34), and in a second position of the grating (G1, G2), the fan-shaped X-ray beams (28) pass through the transparent areas (38).

    SPECTRAL CT VISUALIZATION OF IMAGEABLE DRUG ELUTING BEADS
    37.
    发明申请
    SPECTRAL CT VISUALIZATION OF IMAGEABLE DRUG ELUTING BEADS 审中-公开
    图像可视化图像可视化药水珠

    公开(公告)号：US20150080720A1

    公开(公告)日：2015-03-19

    申请号：US14396066

    申请日：2013-04-22

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Ming De Lin ,  Ewald Roessl ,  Carsten Oliver Schirra

    IPC: A61B6/00 ,  G06T11/00 ,  A61B5/00 ,  G06T7/00

    CPC classification number: A61B6/481 ,  A61B5/4839 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/463 ,  A61B6/482 ,  A61B6/487 ,  A61B6/5205 ,  A61B6/5217 ,  G06T7/0012 ,  G06T11/005 ,  G06T2207/10081

    Abstract: An imaging system (100) includes a radiation source (108) that emits radiation that traverses an examination region and imageable drug eluting beads in tissue of interest located therein, a spectral detector array (110) detects radiation traversing the examination region and generates a signal indicative thereof, spectral processing circuitry (117) that spectrally resolves the signal based on a plurality of thresholds (122), and a reconstructor (128) that generates spectral volumetric image data corresponding the imageable drug eluting beads based on the spectrally resolved signal.

    Abstract translation: 成像系统（100）包括辐射源（108），辐射源（108）发射穿过检查区域的辐射并且位于其中的感兴趣组织中的可成像药物洗脱珠，光谱检测器阵列（110）检测穿过检查区域的辐射，并产生信号 基于多个阈值（122）光谱解析信号的光谱处理电路（117），以及基于光谱解析信号产生对应于可成像药物洗脱珠的光谱体积图像数据的重建器（128）。

    GENERATING ATTENUATION IMAGE DATA AND PHASE IMAGE DATA IN AN X-RAY SYSTEM
    38.
    发明申请
    GENERATING ATTENUATION IMAGE DATA AND PHASE IMAGE DATA IN AN X-RAY SYSTEM 有权
    在X射线系统中产生衰减图像数据和相位图像数据

    公开(公告)号：US20140355740A1

    公开(公告)日：2014-12-04

    申请号：US14370301

    申请日：2012-12-26

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Thomas Koehiler ,  Ewald Roessl

    IPC: A61B6/00

    CPC classification number: A61B6/484 ,  A61B6/482

    Abstract: In generating phase image data 38 first x-ray image data 28a comprising first pixel-wise measurement signal values 30a and second x-ray image data 28b comprising second pixel-wise measurement signal values 30b are received. The first x-ray image data 28a was obtained in a first measurement mode and the second x-ray image data 28b was obtained in a second measurement mode different from the first measurement mode. Phase image data 38 comprising pixel-wise phase values 34 from the first and second x-ray image data 28a, 28b is determined by determining a phase value 34 at a pixel 31 from a first measurement signal value 30a obtained in a first measurement mode at the pixel 31 and a second measurement signal value 30b obtained in a second measurement mode at the pixel 31.

    Abstract translation: 在生成相位图像数据38中，接收包括第一像素测量信号值30a和包括第二像素测量信号值30b的第二x射线图像数据28b的第一x射线图像数据28a。 在第一测量模式下获得第一X射线图像数据28a，并且以与第一测量模式不同的第二测量模式获得第二X射线图像数据28b。 通过从在第一测量模式中获得的第一测量信号值30a确定像素31处的相位值34来确定包括来自第一和第二X射线图像数据28a，28b的像素相位值34的相位图像数据38 像素31和在像素31处以第二测量模式获得的第二测量信号值30b。

    Device and method for phase stepping in phase contrast image acquisition
    40.
    发明授权
    Device and method for phase stepping in phase contrast image acquisition 有权

    公开(公告)号：US11043313B2

    公开(公告)日：2021-06-22

    申请号：US16622321

    申请日：2018-08-22

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Ewald Roessl

    IPC: G01N23/041 ,  G21K1/02 ,  A61B6/00 ,  G21K1/06

    Abstract: 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.

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