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    Fractional flow reserve determination
    43.
    发明授权
    Fractional flow reserve determination 有权

    公开(公告)号：US11490867B2

    公开(公告)日：2022-11-08

    申请号：US16922069

    申请日：2020-07-07

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Hanno Heyke Homann ,  Michael Grass ,  Raoul Florent ,  Holger Schmitt ,  Odile Bonnefous ,  Hannes Nickisch

    IPC: A61B6/00 ,  G06T7/00 ,  G06T7/254 ,  G16H30/40 ,  G16H50/50 ,  A61M5/00 ,  A61B6/03 ,  A61B5/026

    Abstract: The present invention relates to a device (1) for fractional flow reserve determination. The device (1) comprises a model generator (10) configured to generate a three-dimensional model (3DM) of a portion of an imaged vascular vessel tree (VVT) surrounding a stenosed vessel segment (SVS), based on a partial segmentation of the imaged vascular vessel tree (VVT). Further, the device comprises an image processor (20) configured to calculate a blood flow (Q) through the stenosed vessel segment (SVS) based on an analysis of a time-series of X-ray images of the vascular vessel tree (VVT). Still further, the device comprises a fractional-flow-reserve determiner (30) configured to determine a fractional flow reserve (FFR) based on the three-dimensional model (3DM) and the calculated blood flow.

    Calibration-free tomosynthesis
    47.
    发明授权
    Calibration-free tomosynthesis 有权

    公开(公告)号：US11071504B2

    公开(公告)日：2021-07-27

    申请号：US16305246

    申请日：2017-06-05

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Michael Grass ,  Dirk Schaefer

    IPC: A61B6/02 ,  A61B6/00

    Abstract: The present invention relates to tomosynthesis. In order to further facilitate and improve the generation of three-dimensional image data, an X-ray imaging system (10) for calibration-free tomosynthesis is provided. The system comprises an imaging arrangement (12) with an X-ray detector unit (14) and an X-ray unit (16) comprising a plurality of X-ray sources (18). The system also comprises an image processing unit (20), an object receiving space (22), and a moving unit (24) for providing a relative movement between the imaging arrangement and an object of interest arranged at least partially in the object receiving space. The X-ray sources are provided in a known spatial relationship; the X-ray detector unit and the X-ray unit are also provided in a known spatial detector-sources-relationship. The moving unit provides a relative movement between the object of interest and the imaging arrangement in order to provide a plurality of system-to-object positions. The X-ray unit is configured to provide X-ray radiation to the object of interest from a plurality of different directions for each system-to-object position in order to provide a plurality of subsets of views with different viewing directions. The processing unit is configured to determine positions of the object in relation to the imaging arrangement based on the subsets of views, and to calculate a three-dimensional geometric position for each view of the subsets of views, and also to calculate a three-dimensional tomosynthesis reconstruction volume from the plurality of subsets of views.

    AN IMAGING SYSTEM AND METHOD WITH STITCHING OF MULTIPLE IMAGES
    48.
    发明申请
    AN IMAGING SYSTEM AND METHOD WITH STITCHING OF MULTIPLE IMAGES 有权

    公开(公告)号：US20210012490A1

    公开(公告)日：2021-01-14

    申请号：US16969689

    申请日：2019-01-29

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Jörg Sabczynski ,  Michael Grass ,  Sven Peter Prevrhal

    IPC: G06T7/00 ,  G06T7/586

    Abstract: An imaging system combines a probe for obtaining image data in respect of a structure of interest below a surface of a subject, a first camera for obtaining images of the surface of the subject and a second camera for capturing images of the environment. A surface model of the subjects surface is obtained, and the position and/or orientation of the probe is tracked on the surface. Image data acquired at different positions and orientations is stitched based on the tracked position of the probe.

    Device for projecting a guidance image on a subject
    49.
    发明授权
    Device for projecting a guidance image on a subject 有权

    公开(公告)号：US10769787B2

    公开(公告)日：2020-09-08

    申请号：US16063920

    申请日：2016-12-22

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Michael Grass ,  Dirk Schäfer ,  Thirukumaran Thangaraj Kanagasabapathi ,  Bernardus Hendrikus Wilhelmus Hendriks

    IPC: G06K9/00 ,  G06T7/00 ,  A61B90/00 ,  G06T7/11 ,  G06T7/33 ,  A61B6/00 ,  A61B8/08 ,  A61B34/20 ,  A61B17/00

    Abstract: The present invention relates to providing a projection data for providing a guidance image. In order to provide an enhanced guiding image technique for generating a guidance image of the patient's anatomy to be projected on the body surface of the patient, such that a at least a basis for a corrected guidance image for a better correlation to the patient's current motion can be provided, in particular to the patient's current breathing motion state, a device (10) for providing a projection data set is provided that comprises a storage means (12), an input interface (14), a processing unit (16) and an output interface (18). The storage means is configured to store a pre-determined basis data set representing a 3D tomographic image of a subject (20). The input interface is configured to receive reference data representing a current spatial depiction at least of a target region (22) of the subject. The processing unit is configured to register the reference data on the pre-determined basis data set. The processing unit is further configured to transform, based on the reference data and the result of the registration, the pre-determined basis data set resulting in a working data set representing a transformed 3D tomographic image indicating the current spatial anatomy relation at least for the target region of the subject. The processing unit is also configured to segment the working data set resulting in a projection data set representing the target region of the subject. Still further, output interface is configured to provide the projection data set for a further purpose.

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