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    Apparatus for presentation of dark field X-ray image information
    1.
    发明授权
    Apparatus for presentation of dark field X-ray image information 有权

    公开(公告)号：US11350897B2

    公开(公告)日：2022-06-07

    申请号：US16769483

    申请日：2018-11-22

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Rafael Wiemker ,  Andriy Yaroshenko ,  Karsten Rindt ,  Jörg Sabczynski ,  Thomas Koehler ,  Hanns-Ingo Maack

    IPC: A61B6/00 ,  G06T5/50 ,  G06T7/00 ,  G06V10/25

    Abstract: The present invention relates to an apparatus (10) for presentation of dark field information. It is described to provide (210) an X-ray attenuation image of a region of interest of an object. A dark field X-ray image of the region of interest of the object is also provided (220). A plurality of sub-regions of the region of interest are defined (230) based on the X-ray attenuation image of the region of interest or based on the dark field X-ray image of the region of interest. At least one quantitative value is derived (240) for each of the plurality of sub-regions, wherein the at least one quantitative value for a sub-region comprises data derived from the X-ray attenuation image of the sub-region and data derived from the dark field X-ray image of the sub-region. A plurality of figures of merit are assigned (250) to the plurality of sub-regions, wherein a figure of merit for a sub-region is based on the at least one quantitative value for the sub-region. Data representative of the region of interest is output (260) with figures of merit for the respective sub-regions.

    Apparatus for generating X-ray imaging data
    2.
    发明授权
    Apparatus for generating X-ray imaging data 有权

    公开(公告)号：US11759159B2

    公开(公告)日：2023-09-19

    申请号：US17263570

    申请日：2019-08-01

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Thomas Koehler ,  Gereon Vogtmeier ,  Andriy Yaroshenko

    IPC: A61B6/00 ,  A61B6/03

    CPC classification number: A61B6/484 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4291

    Abstract: The present invention relates to an apparatus (10) for generating X-ray imaging data. It is described to position (210) a first grating between an X-ray source and a second grating. The second grating is positioned (220) between the first grating and a third grating. A third grating is positioned (230) between the second grating and an X-ray detector. An object is positioned (240) between the first grating and the third grating. At least one of the three gratings has a pitch attribute of having a constant grating pitch. At least one of the three gratings has a pitch attribute of having a varying grating pitch. Both gratings of an adjacent pair of gratings are bent such that a distance between the two adjacent gratings is constant as a function of fan angle. Both gratings of the adjacent pair of gratings that are bent have the same pitch attribute. An X-ray detector detects (250) at least some of the X-rays transmitted by the three gratings and the object.

    System, method and computer program for acquiring phase imaging data of an object
    4.
    发明授权
    System, method and computer program for acquiring phase imaging data of an object 有权

    公开(公告)号：US11980494B2

    公开(公告)日：2024-05-14

    申请号：US17431559

    申请日：2020-02-10

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Andriy Yaroshenko ,  Thomas Koehler ,  Hanns-Ingo Maack

    IPC: A61B6/00 ,  A61B6/42 ,  G01N23/041

    CPC classification number: A61B6/542 ,  A61B6/4291 ,  A61B6/484 ,  A61B6/545 ,  G01N23/041 ,  G21K2207/005

    Abstract: The invention relates to a control module for controlling an x-ray system (140) during the acquisition of step images for phase imaging. The control module comprises a step image quantity providing unit (111) for providing a step image quantity, a detector dose providing unit (112) for providing a target detector dose, an applied detector dose determination unit (113) for determining an applied detector dose absorbed by a part of the detector (144) during the acquisition of a step image, and a step image acquisition control unit (114) for controlling the x-ray imaging system (140) during the acquisition of each step image based on the applied detector dose, the target detector dose and the step image quantity. The control module allows to control the x-ray imaging system such that the target detector dose is not exceeded while at the same time ensuring a sufficient quality of the step images.

    X-ray imaging reference scan
    5.
    发明授权
    X-ray imaging reference scan 有权

    公开(公告)号：US11231378B2

    公开(公告)日：2022-01-25

    申请号：US16650220

    申请日：2018-09-21

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Andriy Yaroshenko ,  Thomas Koehler ,  Peter Benjamin Theodor Nöel ,  Fabio De Marco ,  Lukas Benedict Gromann ,  Konstantin Willer

    IPC: G01N23/041 ,  A61B6/00

    Abstract: The present invention relates to acquiring reference scan data for X-ray phase-contrast imaging and/or X-ray dark-field imaging. Therefore an X-ray detector (26) is arranged opposite an X-ray source (12) across an examination region (30) with a grating arrangement (18) arranged between the X-ray source (12) and the X-ray detector (26). During an imaging operation without an object in the examination region (30) the grating arrangement (18) is moved in a scanning motion to a number of different positions (a) relative to the X-ray detector (26) whilst the X-ray detector (26) remains stationary relative to the examination region (30) such that in the scanning motion a series of fringe patterns is detected by the X-ray detector (26). The scanning motion is repeated for a different series of fringe patterns. This allows acquiring reference scan data required for calibration of an X-ray imaging device (10′″) with less scanning motions.

    Active gratings position tracking in gratings-based phase-contrast and dark-field imaging
    8.
    发明授权
    Active gratings position tracking in gratings-based phase-contrast and dark-field imaging 有权

    公开(公告)号：US11506617B2

    公开(公告)日：2022-11-22

    申请号：US17607084

    申请日：2020-11-06

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Sven Peter Prevrhal ,  Thomas Koehler ,  Andriy Yaroshenko

    IPC: G01N23/041 ,  A61B6/00 ,  G01B11/27

    Abstract: The invention relates to a system and a method for active grating position tracking in X-ray differential phase contrast imaging and dark-field imaging. The alignment of at least one grating positioned in an X-ray imaging device is measured by illuminating a reflection area located on the grating with a light beam, and detecting a reflection pattern of the light beam reflected by the reflection area. The reflection pattern is compared with a reference pattern corresponding to an alignment optimized for X-ray differential phase contrast imaging, and the X-ray imaging device is controlled upon the comparison of the reflection pattern and the reference pattern.

    Sensitivity optimized patient positioning system for dark-field x-ray imaging
    9.
    发明授权
    Sensitivity optimized patient positioning system for dark-field x-ray imaging 有权

    公开(公告)号：US10945691B2

    公开(公告)日：2021-03-16

    申请号：US16497066

    申请日：2018-02-27

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Thomas Koehler ,  Andriy Yaroshenko

    IPC: A61B6/00 ,  A61B6/08

    Abstract: The present invention relates to grating based Dark-Field and/or phase-contrast X-ray imaging. In order to improve the quality of an image, a radiography system (10) for grating based Dark-Field and/or phase-contrast X-ray imaging for imaging a patient by irradiating the patient is provided. The system comprises a source unit (12), a detection unit (14) and a patient support unit (16) with a patient abutting surface (18). The source unit (12) and the detection unit (14) are arranged along an optical axis (13) and the patient support unit (16) is arranged in between. Further, an abutting distance (dA) between the source unit (12) and the patient abutting surface (18) along the optical axis (13) is adaptable. The abutting distance (dA) and an actual sensitivity, based on the abutting distance (dA), are taken into account for imaging, such that a trade-off between sensitivity and field of view in a patient specific manner is achievable, e.g. the best trade-off.

    System and method for correcting motion artifacts by combining images in phase-contrast and dark-field imaging applications
    10.
    发明授权
    System and method for correcting motion artifacts by combining images in phase-contrast and dark-field imaging applications 有权

    公开(公告)号：US12272036B2

    公开(公告)日：2025-04-08

    申请号：US17778946

    申请日：2020-11-20

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Thomas Koehler ,  Andriy Yaroshenko ,  Hanns-Ingo Maack ,  Thomas Pralow ,  Bernd Lundt

    IPC: G06T5/80 ,  G06T5/50 ,  G06T7/20

    Abstract: A system (IPS) and related method for image processing, in particular dark-field or phase contrast imaging to reduce motion artifacts. The system comprises an input interface (IN) for receiving a series of projection images (π) acquired by an X-ray imaging apparatus (XI) of an object (OB) for a given projection direction, the imaging apparatus (XI) configured for phase-contrast and/or dark-field imaging A phase-contrast and/or dark-field image generator (IGEN) applies an image generation algorithm to compute a first image based on the series the projection images (π). A motion artifact detector (MD) detects a motion artifact in the first image. A combiner (Σ) combines, if a motion artifact is so detected, a part of the first image with a part of at least one auxiliary image to obtain a combined image. The auxiliary image was previously computed by a gated application of the image generation algorithm in respect of a subset of the series of the projection images (π). The combined image may be output at an output interface (OUT) as a motion artifact reduced image.

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