Abstract: A method for co-registration of angiography and intravascular images is described in which intravascular images are in the form of a sequence of images obtained from an intravascular imaging device which is pulled back through a vessel. The method includes generating a three-dimensional reconstruction of the trajectory of the intravascular device within the vessel from two or more bi-dimensional angiography images of such vessel which have been obtained from different perspectives. The method also includes determining a first position of an element of the device within the 3D reconstruction of the trajectory and correlating the position of such element with a correspondent point in the reconstructed trajectory during pull back. Further, the method includes correlating each intravascular image of the sequence with a corresponding spatial position within at least one of the bi-dimensional angiography images. A corresponding system and computer program are also described.

Abstract: A computer-implemented method for determining a 3D surface reconstruction of an object, which comprises generating a first 3D surface reconstruction of the object from a plurality of 2D images of the object obtained from different perspectives. A region of interest of the object is specified. At least one viewing direction is determined for viewing the specified region of interest. At least one 2D image of the object corresponding to the at least one viewing direction is obtained. A second 3D surface reconstruction of the object is generated from all or part of the 2D images used to generate the first 3D surface reconstruction and the at least one 2D image of the object corresponding to the at least one viewing direction for the specified region of interest. A corresponding apparatus and computer program are also disclosed.

Abstract: A method for co-registration of angiography and intravascular images is described in which intravascular images are in the form of a sequence of images obtained from an intravascular imaging device which is pulled back through a vessel. The method includes generating a three-dimensional reconstruction of the trajectory of the intravascular device within the vessel from two or more bi-dimensional angiography images of such vessel which have been obtained from different perspectives. The method also includes determining a first position of an element of the device within the 3D reconstruction of the trajectory and correlating the position of such element with a correspondent point in the reconstructed trajectory during pull back. Further, the method includes correlating each intravascular image of the sequence with a corresponding spatial position within at least one of the bi-dimensional angiography images. A corresponding system and computer program are also described.

Abstract: A computer-implemented method for determining a 3D surface reconstruction of an object, which comprises generating a first 3D surface reconstruction of the object from a plurality of 2D images of the object obtained from different perspectives. A region of interest of the object is specified. At least one viewing direction is determined for viewing the specified region of interest. At least one 2D image of the object corresponding to the at least one viewing direction is obtained. A second 3D surface reconstruction of the object is generated from all or part of the 2D images used to generate the first 3D surface reconstruction and the at least one 2D image of the object corresponding to the at least one viewing direction for the specified region of interest. A corresponding apparatus and computer program are also disclosed.