Method and device for flow reconstruction
First Claim
1. A device for the three-dimensional reconstruction of flow conditions in a vascular system using two-dimensional projections of the vascular system during a contrast-medium injection, comprising;
- an imaging device for producing two-dimensional projection pictures of the vascular system taken from different directions;
an injection device for controlled injection of a contrast medium into the vascular system;
a control unit that is coupled to the imaging device 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 at a high picture-taking rate during inflow of the contrast medium after a contrast-medium injection;
b) rotation of the imaging device around the vascular system and production of projection pictures taken from different directions while the vascular system is filled with the contrast medium;
c) production of projection pictures from a fixed direction during drainage of the contrast medium from the vascular system.
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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 picture taking 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
20 Claims
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1. A device for the three-dimensional reconstruction of flow conditions in a vascular system using two-dimensional projections of the vascular system during a contrast-medium injection, comprising;
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an imaging device for producing two-dimensional projection pictures of the vascular system taken from different directions; an injection device for controlled injection of a contrast medium into the vascular system; a control unit that is coupled to the imaging device 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 at a high picture-taking rate during inflow of the contrast medium after a contrast-medium injection; b) rotation of the imaging device around the vascular system and production of projection pictures taken from different directions while the vascular system is filled with the contrast medium; c) production of projection pictures from a fixed direction during drainage of the contrast medium from the vascular system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for three-dimensional reconstruction of flow conditions in a vascular system using two-dimensional projections of the vascular system during a contrast-medium injection, comprising:
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a) production of projection pictures taken from the same projection direction at a high picture-taking rate during the inflow of the contrast medium; b) production of projection pictures of the vascular system taken from different directions while the vascular system is filled with the contrast medium; and c) production of projection pictures from a fixed direction during drainage of the contrast medium from the vascular system after step b). - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for three-dimensional reconstruction of flow conditions in a vascular system using two-dimensional projections of the vascular system during a contrast-medium injection, the method comprising capturing a first set of images of the vascular system taken from different directions while the vascular system is filled with the contrast medium;
- and capturing a second set of images from a fixed direction during drainage of the contrast medium from the vascular system.
- View Dependent Claims (18, 19, 20)
Specification