Apparatus and method for determining three-dimensional representations of tortuous vessels
AssigneeUniversity of Iowa Research Foundation
InventorsGuido P. M. Prause, Milan Sonka
Life of this patent
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Abstract
Three-dimensional reconstructions of tortuous vessels such as coronary arteries can be obtained by data fusion between biplane angiography and IVUS frames of a pullback sequence. The 3D course of the tortuous vessel is first determined from the angiograms and then combined with the 2D representations regarding the 3D course (e.g., segmented IVUS frames of a pullback sequence) using a data fusion apparatus and method: The determination of the 3D pullback path is represented by the external energy of the tortuous vessel and the internal energy of a line object such as a catheter.
Claims16
An apparatus for determining three dimensional representations of a tortuous vessel, comprising:
- an external information processing unit for receiving a first set of images of a line object in the tortuous vessel, determining external energy information of said first set of images and outputting said external energy information;
- an internal information processing unit for receiving internal information related to the line object including a minimum bending radius, determining internal energy information of the line object and outputting said internal energy information;
- a 3D pullback path determination unit for receiving said external energy information and said internal energy information and determining a 3D pullback path that is physically feasible based on the line object;
- and
- means for receiving said 3D pullback path and for calculating three dimensional representations of the tortuous vessel based on said 3D pullback path, wherein the means for receiving and calculating receives 2D representations of the interior of the tortuous vessel at a plurality of points along the 3D pullback path, and wherein the means for receiving and calculating comprises a global interpolating means for interpolating using global behavior of the line object to approximate a local behavior between corresponding points of the plurality of 2D representations of the interior of the tortuous vessel, wherein the interpolating using the global behavior determines the three dimensional representations of the tortuous vessel.
A method for determining three dimensional representations of a tortuous vessel, comprising:
- determining external information of the tortuous vessel;
- determining internal information of a line object sensor;
- determining a 3D pullback path of the line object sensor based on the external information and the internal information;
- and
- calculating three dimensional representations of the tortuous vessel based on the 3D pullback path, wherein the calculating step comprises,
- receiving a plurality of 2D cross-sectional images of the interior of the tortuous vessel, and
- interpolating using global behavior of the line object sensor,
- wherein a local behavior between corresponding points of the plurality of 2D cross-sectional images is represented by an approximation utilizing behavior of the entire line object sensor to determine the three dimensional representations of the tortuous vessel between the corresponding points of the plurality of 2D cross-sectional images, and wherein the determining a 3D pullback path of the line object sensor step comprises,
- constructing a 3D cost volume based on the external information of the tortuous vessel,
- constructing a 3D representation of the line object sensor based on the internal information of the line object sensor including at least a minimum bending radius,
- determining a low cost path of the line object sensor through the 3D cost volume that is physically feasible for the line object sensor, and
- interpolating the physically feasible low cost path using the global behavior of the line object sensor.
Dependencies are inferred from the claim text.