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    Beamforming in ultrasound imaging systems to correct for refraction of ultrasound by transducer elements
    43.
    发明授权
    Beamforming in ultrasound imaging systems to correct for refraction of ultrasound by transducer elements 有权

    公开(公告)号：US11864949B2

    公开(公告)日：2024-01-09

    申请号：US16943959

    申请日：2020-07-30

    Applicant: FUJIFILM SONOSITE, INC.

    Inventor： Michael Hansen

    IPC: A61B8/08 ,  A61B8/00

    CPC classification number: A61B8/5207 ,  A61B8/4281 ,  A61B8/4494 ,  A61B8/488

    Abstract: In one embodiment, a method is provided. The method includes transmitting a set of ultrasound waves to towards a target area. The set of ultrasound waves are transmitted by a set of ultrasound elements. The set of ultrasound elements are positioned at different locations in a transducer assembly. The method also includes receiving a set of reflections of the set of ultrasound waves. The set of reflections of the set of ultrasound waves are received by the set of ultrasound elements. The method further includes determining a set of correction values for the set of ultrasound elements. Each correction value of the set of correction values represents a refraction of one reflection of the set of reflections as the one reflection passes through a respective ultrasound element of the set of ultrasound elements. The method further includes generating imaging data based on the set of reflections of the set of ultrasound waves and the set of correction values for the set of ultrasound elements.

    BLOOD VELOCITY DETERMINATION
    44.
    发明公开
    BLOOD VELOCITY DETERMINATION 审中-公开

    公开(公告)号：US20240000415A1

    公开(公告)日：2024-01-04

    申请号：US18039513

    申请日：2021-11-28

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： LUUK ANTON ELI MARIA VAN KNIPPENBERG ,  JOHANNES ANTONIUS VAN ROOIJ ,  KRISHNAMOORTHY PALANISAMY ,  SERGEI Y. SHULEPOV

    IPC: A61B8/06 ,  A61B8/08

    CPC classification number: A61B8/06 ,  A61B8/0891 ,  A61B8/488 ,  A61B8/5246

    Abstract: A method is provided for estimating blood velocity in vessel, for example for use in deriving a measure of blood flow through the vessel. The method comprises two stages. In a first stage, multiple measurements of blood velocity are acquired, using ultrasound data, at different radial positions across a blood vessel cross-section. A velocity profile is determined (velocity as a function of measurement location across the vessel cross-section) based on this. In a second stage, in one or more subsequent cardiac cycles, new ultrasound data is acquired and a blood velocity measurement acquired at a single location. The single blood velocity measurement preferably corresponds to a location of maximum velocity. This single measurement, in combination with the personalized velocity profile already derived, is used to derive a measure of average blood velocity within the vessel.

    METHODS AND SYSTEMS FOR TRACKING A MOTION OF A PROBE IN AN ULTRASOUND SYSTEM
    46.
    发明公开
    METHODS AND SYSTEMS FOR TRACKING A MOTION OF A PROBE IN AN ULTRASOUND SYSTEM 审中-公开

    公开(公告)号：US20230404528A1

    公开(公告)日：2023-12-21

    申请号：US18035985

    申请日：2021-11-10

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Shakith Devinda Fernando ,  Karl Catharina van Bree

    IPC: A61B8/00 ,  A61B8/08

    CPC classification number: A61B8/4254 ,  A61B8/488 ,  A61B8/483

    Abstract: The invention provides for a method of generating a tracked imaging region representing ultrasound data acquired from a subject. The method comprises obtaining ultrasound data acquired from an imaging region by way of an ultrasound probe. A first image and a second image of a surface, acquired during the acquisition of the ultrasound data, are obtained by way of an image sensor coupled to the ultrasound probe. The first image and the second image are compared and a first motion component of the ultrasound probe is computed based on the comparison. A second motion component of the ultrasound probe, acquired during the acquisition of the ultrasound data, is then obtained by way of an inertial measurement unit coupled to the image sensor. The first motion component and the second motion component are combined, thereby generating a motion of the ultrasound probe, which is then combined with the ultrasound data from the imaging region, thereby generating a tracked imaging region.

    APPARATUS AND METHOD FOR ESTIMATING A VELOCITY FIELD
    50.
    发明公开
    APPARATUS AND METHOD FOR ESTIMATING A VELOCITY FIELD 审中-公开

    公开(公告)号：US20230355209A1

    公开(公告)日：2023-11-09

    申请号：US18042747

    申请日：2021-08-27

    Applicant: E-SCOPICS

    Inventor： Adrien BESSON ,  Frederic WINTZENRIETH

    IPC: A61B8/00 ,  A61B8/08 ,  A61B8/06

    CPC classification number: A61B8/4494 ,  A61B8/488 ,  A61B8/06

    Abstract: The invention concerns an apparatus for estimating a velocity of at least one scatterer in a medium, the apparatus comprising



    a generator for generating excitation signals,
    a curved array of virtual transducers (T1-Tn) for transforming said excitation signals into Archimedean spiral waves and for:

    emitting said Archimedean spiral waves in a plurality of predetermined directions of propagation defined by a set of insonification angles (αi), a curvature of said curved array of virtual transducers defining a reference center (O) and a radius of curvature (rn),
    and for receiving, from said at least one scatterer, scattered signals generated by scattering of said Archimedean spiral waves emitted from said curved array of virtual transducers,


    a driving and processing unit (Uc) for estimating the velocity of said at least one scatterer
    wherein axial and lateral velocity components are estimated using a set of local wavefront orientations (αeq,i) of the Archimedean spiral waves as a function of the initial set of insonification angles (αi), the geometry of the curved array of transducers and the distance (r) to the reference center (O), each local wavefront orientation satisfying the following formula:









    α

    eq
    ,
    i


    =

    arc
    ⁢


    sin
    ⁡
    (



    r
    n

    r

    ⁢
    sin
    ⁢

    α
    i


    )

    .

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