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    1.
    发明专利
    未知

    公开(公告)号：DE602004001973D1

    公开(公告)日：2006-09-28

    申请号：DE602004001973

    申请日：2004-01-23

    Applicant: PHILIPS INTELLECTUAL PROPERTY

    Inventor： WEESE JUERGEN ,  RASCHE VOLKER ,  YOUNG STEWART ,  MOVASSAGHI BABAK

    IPC: G06T7/00 ,  G06T5/00 ,  G06T17/10

    Abstract: The invention relates to a method for the computer-aided reconstruction of a three-dimensional anatomical object ( 3 ) from diagnostic image data. First of all, a diagnostic image data set of the object ( 3 ) is acquired. Then a seed point ( 5 ) is set, starting from which the object is reconstructed within a reconstruction volume ( 4 ). Thereafter, an adjacent point of the reconstruction volume ( 4 ) likewise belonging to the object ( 3 ) is located in accordance with a propagation criterion, which is calculated by means of a mathematical analysis of local areas ( 6, 7 ), assigned to the point concerned, of the image data set Reconstruction of the three-dimensional structure of the object ( 3 ) is then performed within the reconstruction volume ( 4 ) by multiple repetition of this method step and propagation along the located adjacent points. To apply such a reconstruction method to image data obtained by means of rotational X-ray imaging, wherein a plurality of two-dimensional projection images ( 1, 2 ) are recorded from different projection directions, the invention proposes that the propagation criterion be calculated by subjecting the local image areas ( 6, 7 ) of the two-dimensional projection images ( 1, 2 ) in each case individually to the mathematical analysis.

    3.
    发明专利
    未知

    公开(公告)号：DE602004017000D1

    公开(公告)日：2008-11-20

    申请号：DE602004017000

    申请日：2004-06-16

    Applicant: PHILIPS INTELLECTUAL PROPERTY

    Inventor： MOVASSAGHI BABAK ,  RASCHE VOLKER

    IPC: G06T11/00

    Abstract: The invention relates to a method and a device for generating a threedimensional image of an object ( 9 ) such as in particular the heart, from a series of (X-ray) projection pictures (P i , P j , P k , P l ). For the reconstruction only those projection pictures are used in which the projection lines (l i , l k , l l ) of a characteristic object feature intersect at approximately the same spatial point ( r 0 ). The characteristic object feature can in particular be a vessel branch which can easily be located on the projection pictures.

    4.
    发明专利
    未知

    公开(公告)号：DE10219594A1

    公开(公告)日：2003-11-13

    申请号：DE10219594

    申请日：2002-05-02

    Applicant: PHILIPS INTELLECTUAL PROPERTY

    Inventor： RASCHE VOLKER

    IPC: A61B6/00 ,  A61B6/12 ,  A61M25/01 ,  A61M25/095

    Abstract: The invention relates to a method of determining the position of a catheter introduced along a guide wire inserted into a body, in which method an image of the guide wire and the body region at the area of the guide wire is acquired by means of an imaging method, the distance traveled by the catheter on the guide wire is measured and the position of the catheter in the body is determined on the basis of the measured distance. The invention also relates to a device for determining the position of a catheter introduced along a guide wire inserted into a body, which device includes sensor means for measuring the distance traveled by the catheter on the guide wire and means for determining the position of the catheter on the basis of the measured distance.

    7.
    发明专利
    未知

    公开(公告)号：DE602004002939D1

    公开(公告)日：2006-12-07

    申请号：DE602004002939

    申请日：2004-02-03

    Applicant: PHILIPS INTELLECTUAL PROPERTY

    Inventor： RASCHE VOLKER ,  MOVASSAGHI BABAK

    IPC: G06T7/00 ,  G06T11/00 ,  G06T17/10

    Abstract: The invention provides a method for 3D modeling of a three-dimensional tubular structure of an examination object from 2D projection images (D) of the structure taken from different projection directions. The method has the following steps: reconstruction of a 3D image from the 2D projection images (D); selection of at least one 3D central line point (MO) in the 3D image, said 3D central line point being located in the structure; segmentation of 3D central line points (M) of the structure in the 3D image; forward projection of the 3D central line points (M), which have been segmented in the 3D image, into 2D projection images (D'); determination of border points of the structure in the 2D projection images (D') on the basis of 3D central line points (Z) that have been projected in; and back-projection of the border points from the 2D projection image (D') into the 3D image.

    9.
    发明专利
    未知

    公开(公告)号：DE602004002939T2

    公开(公告)日：2007-06-21

    申请号：DE602004002939

    申请日：2004-02-03

    Applicant: PHILIPS INTELLECTUAL PROPERTY

    Inventor： RASCHE VOLKER ,  MOVASSAGHI BABAK

    IPC: G06T7/00 ,  G06T11/00 ,  G06T17/10

    Abstract: The invention provides a method for 3D modeling of a three-dimensional tubular structure of an examination object from 2D projection images (D) of the structure taken from different projection directions. The method has the following steps: reconstruction of a 3D image from the 2D projection images (D); selection of at least one 3D central line point (MO) in the 3D image, said 3D central line point being located in the structure; segmentation of 3D central line points (M) of the structure in the 3D image; forward projection of the 3D central line points (M), which have been segmented in the 3D image, into 2D projection images (D'); determination of border points of the structure in the 2D projection images (D') on the basis of 3D central line points (Z) that have been projected in; and back-projection of the border points from the 2D projection image (D') into the 3D image.

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