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    Spectral projection extension
    1.
    发明授权
    Spectral projection extension 有权

    公开(公告)号：US10736590B2

    公开(公告)日：2020-08-11

    申请号：US15509042

    申请日：2015-09-16

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Dirk Schafer ,  Michael Grass ,  Thomas Koehler ,  Roland Proksa

    IPC: A61B6/03 ,  A61B6/00 ,  G01N23/046

    Abstract: A method includes receiving radiation with a hybrid data detection system of an imaging system. The hybrid data detection system includes a hybrid data detector array with a set of spectral detectors and a set of integrating detectors that are arranged along a transverse axis of an examination region. The method further includes generating a set of truncated spectral projections with the first set of spectral detectors. The method further includes estimating a set of spectral projections for the integrating detectors. The method further includes combining the set of truncated spectral projections and the estimated set of spectral projections. The method further includes estimating a set of spectral projections based on the combined set to produce a complete set of spectral projections. The method further includes processing the complete set of spectral projections to generate volumetric image data.

    Grating device for phase contrast and/or dark-field imaging of a movable object
    2.
    发明授权
    Grating device for phase contrast and/or dark-field imaging of a movable object 有权

    公开(公告)号：US09895117B2

    公开(公告)日：2018-02-20

    申请号：US15310933

    申请日：2015-10-01

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Michael Grass ,  Dirk Schafer ,  Thomas Koehler

    IPC: G03H5/00 ,  A61B6/00

    CPC classification number: A61B6/4291 ,  A61B6/484 ,  A61B6/503 ,  A61B6/504 ,  A61B6/527

    Abstract: The invention relates to a grating device for phase contrast and/or dark-field imaging of a movable object, an interferometer unit, a phase contrast and/or dark-field imaging system, a phase contrast and/or dark-field imaging method, a computer program element for controlling such device and a computer readable medium having stored such computer program element. The grating device comprises a grating unit, an actuation unit, a motion detecting unit, and a control unit. The actuation unit is configured to position the grating unit in different sampling positions relative to the moveable object. The motion detecting unit is configured to detect a motion of the movable object. The detected motion of the moveable object may be a repetitive motion. The control unit is configured to control the actuation unit to position the grating unit in the different sampling positions based on the detected motion of the movable object.

    X-ray system error tracking and calibration
    4.
    发明授权
    X-ray system error tracking and calibration 有权

    公开(公告)号：US11419571B2

    公开(公告)日：2022-08-23

    申请号：US17047103

    申请日：2019-04-05

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Christian Haase ,  Michael Grass ,  Dirk Schafer

    IPC: G01D18/00 ,  A61B6/00

    Abstract: Mechanical image acquisition systems (such as medical C-arms) frequently accumulate geometrical errors which must be calibrated out using a calibration phantom. A more frequent regime of system calibration implies a less frequent use of the C-arm for clinical applications. The present application proposes to identify common biases between the acquired projection frame sequences from the same mechanical image acquisition system in first and second acquisitions, and to compare this to expected calibration data of the mechanical image acquisition system to generate frame deviation measures. If a resemblance between the first and second sequences of frame deviation measures is obtained, one or more calibration actions are performed (such as alerting the user that calibration should be provided, and/or automatically correcting for the geometry deviation).

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