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    SYSTEMS AND METHODS FOR RECONSTRUCTING CARDIAC IMAGES
    3.
    发明申请
    SYSTEMS AND METHODS FOR RECONSTRUCTING CARDIAC IMAGES 有权

    公开(公告)号：US20210225048A1

    公开(公告)日：2021-07-22

    申请号：US17202308

    申请日：2021-03-15

    申请人： SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

    发明人： Yi WANG

    IPC分类号： G06T11/00 ,  G06T7/90 ,  G06T7/11 ,  G06T5/00 ,  G06T5/50 ,  G06T5/20 ,  A61B5/00 ,  A61B6/00 ,  G06T7/00 ,  A61B6/03

    摘要： A method for reconstructing target cardiac images is provided. The method may include: obtaining projection data, the projection data including a plurality of sub-sets of projection data, each sub-set of projection data corresponding to a cardiac motion phase; obtaining a plurality of sampled cardiac motion phases; generating a plurality of cardiac images of the plurality of sampled cardiac motion phases by reconstructing, based on the one or more sub-sets of projection data corresponding to the each sampled cardiac motion phase, one or more cardiac images of the each sampled cardiac motion phase; determining a plurality of cardiac motion parameters corresponding to the plurality of sampled cardiac motion phases based on the plurality of cardiac images; determining a mean phase based on the plurality of cardiac motion parameters corresponding to the plurality of sampled cardiac motion phases; and reconstructing the one or more target cardiac images of the mean phase.

    SYSTEMS AND METHODS FOR DETERMINING RING ARTIFACT
    8.
    发明申请
    SYSTEMS AND METHODS FOR DETERMINING RING ARTIFACT 审中-公开

    公开(公告)号：US20200380640A1

    公开(公告)日：2020-12-03

    申请号：US16862636

    申请日：2020-04-30

    申请人： SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

    发明人： Yuan BAO ,  Yi WANG ,  Wenjing CAO ,  Xiang LI

    IPC分类号： G06T5/00 ,  G06T11/00 ,  G06T7/00 ,  A61B6/00 ,  A61B6/03

    摘要： The embodiments of the present disclosure disclose methods and systems for determining a ring artifact. The method for determining the ring artifact may include: obtaining an original image; mapping a plurality of pixels in the original image to a polar coordinate image; determining a protection region in the polar coordinate image; obtaining a smooth image by smoothing at least one region in the polar coordinate image other than the protection region; generating a residual image based on the polar coordinate image and the smooth image; determining a location of the ring artifact in the original image based on the residual image. In the present disclosure, the original image may be mapped to a trapezoidal region or a triangular region in the polar coordinate image, and the gradient angle image may be used for image processing, which may reduce the influence of noise. An accurate location of the ring artifact may be determined, and information for imaging device detection and air correction may be provided.