Method and device for flow reconstruction
First Claim
1. A device for the three-dimensional reconstruction of the flow conditions in a vascular system (3) with the aid of two-dimensional projections of the vascular system during a contrast-medium injection, comprising an imaging device (1) for producing two-dimensional projection pictures of the vascular system (3) taken from different directions (A, Bi, C);
- an injection device (5) for the controlled injection of a contrast medium into the vascular system (3);
a control unit (6) that is coupled to the imaging device (1) and that is designed to drive the imaging device in accordance with the following steps;
a) production of projection pictures taken from the same projection direction (A) at a high picture-taking rate during the inflow of the contrast medium after a contrast-medium injection;
b) rotation of the imaging device around the vascular system (3) and production of projection pictures taken from different directions (Bi) while the vascular system (3) is filled with contrast medium.
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Accused Products
Abstract
The invention relates to a method and a device for the three-dimensional reconstruction of the flow conditions in a vascular system (3), in which, in a first phase after the beginning of a contrast-medium injection, X-ray projection pictures are produced from the same direction (A) at a high picture-taking rate in order to observe the inflow of the contrast medium. When the contrast medium fills the vascular system (3), a rotation of the Xray device (1) takes place during which projection pictures are produced at a lower picturetaking rate and/or at a lower radiation dose, from which pictures the three-dimensional structure of the vascular tree can be reconstructed. Optionally, at the end of the rotation, projection pictures may again be taken from a fixed direction that observe the drainage of the contrast medium from the vascular system (3).
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Citations
10 Claims
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1. A device for the three-dimensional reconstruction of the flow conditions in a vascular system (3) with the aid of two-dimensional projections of the vascular system during a contrast-medium injection, comprising
an imaging device (1) for producing two-dimensional projection pictures of the vascular system (3) taken from different directions (A, Bi, C); -
an injection device (5) for the controlled injection of a contrast medium into the vascular system (3);
a control unit (6) that is coupled to the imaging device (1) and that is designed to drive the imaging device in accordance with the following steps;
a) production of projection pictures taken from the same projection direction (A) at a high picture-taking rate during the inflow of the contrast medium after a contrast-medium injection;
b) rotation of the imaging device around the vascular system (3) and production of projection pictures taken from different directions (Bi) while the vascular system (3) is filled with contrast medium. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for the three-dimensional reconstruction of the flow conditions in a vascular system with the aid of two-dimensional projections of the vascular system during a contrast-medium injection, comprising the following steps:
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a) production of projection pictures taken from the same projection direction (A) at a high picture-taking rate during the inflow of the contrast medium;
b) production of projection pictures of the vascular system (3) taken from different directions (Bi) while it is filled with contrast medium. - View Dependent Claims (8, 9, 10)
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Specification