Segmenting an angiography using an existing three-dimensional reconstruction

1. A method for segmenting a two-dimensional angiographic recording of a vessel of a body by a computing apparatus, the method comprising:

providing a three-dimensional reconstruction of the vessel of the body on the computing apparatus;

providing the two-dimensional angiographic recording of the vessel of the body on the computing apparatus;

registering the three-dimensional reconstruction of the vessel of the body with the two-dimensional angiographic recording of the vessel of the body;

projecting spatial information of the three-dimensional reconstruction onto the two-dimensional angiographic recording, the projecting comprising detecting a variation between the spatial information of the three-dimensional reconstruction and corresponding spatial information of the two-dimensional angiographic recording and adjusting the two-dimensional angiographic recording based on the variation; and

segmenting the two-dimensional angiographic recording using the spatial information projected onto the two-dimensional angiographic recording,

wherein the adjusting comprises displacing, rotating, or displacing and rotating the two-dimensional angiographic recording, deforming the two-dimensional angiographic recording, or a combination thereof.

2. The method of claim 1 , wherein the spatial information comprises at least one centerline of the vessel of the body that is projected onto the two-dimensional angiographic recording, and based on the at least one projected centerline, a centerline for the vessel of the body is determined on the two-dimensional angiographic recording and is used in the segmentation.

3. The method of claim 2 , wherein the at least one projected centerline is determined as a centerline for the vessel of the body on the recording and is used in the segmentation.

4. The method of claim 1 , wherein the spatial information comprises segmentation information of the three-dimensional reconstruction of the vessel of the body.

5. The method of claim 1 , wherein the three-dimensional reconstruction comprises a computed tomography or a magnetic resonance tomography.

6. The method of claim 1 , further comprising:

minimizing the variation, the minimizing comprising adjusting the two-dimensional angiographic recordings,

wherein the detecting is prior to or during use of the spatial information projected onto the two-dimensional angiographic recording.

7. The method of claim 6 ,

wherein a diameter of the vessel of the body is retained.

8. The method of claim 7 , wherein a diameter of the vessel of the body is retained with a plastic deformation.

9. The method of claim 6 , wherein the variation is minimized, such that a movement of the vessel of the body is compensated.

10. The method of claim 9 , wherein the variation is minimized, such that a displacement of the vessel of the body caused by a breathing movement, a couch movement, a geometric shortening of the vessel of the body caused by a movement, or any combination thereof is compensated.

11. The method of claim 1 , wherein the providing of the two-dimensional angiographic recording of the vessel, the registering, the projecting, and the segmenting are additionally carried out for one or more further two-dimensional angiographic recordings of the vessel of the body in place of the two-dimensional angiographic recording of the vessel of the body with the same three-dimensional reconstruction.

12. The method of claim 11 , further comprising:

generating a three-dimensional angiography of the vessel of the body from the two-dimensional angiographic recording and the one or more further two-dimensional angiographic recordings by the computing apparatus; and

adjusting a three-dimensional structure of the vessel of the body in the three-dimensional angiography to a three-dimensional structure of the vessel of the body in the three-dimensional reconstruction.

13. The method of claim 1 , wherein the variation is minimized by adjusting the two-dimensional angiographic recording.

14. An examination system for segmenting a two-dimensional angiographic recording of a vessel of a body, the examination system comprising:

a medical imaging device configured to provide a three-dimensional reconstruction of the vessel of the body;

an angiography device configured to provide the two-dimensional angiographic recording of the vessel of the body; and

a computer that is coupleable to the medical imaging device, the computing apparatus being configured to:

register the three-dimensional reconstruction of the vessel of the body with the two-dimensional angiographic recording of the vessel of the body;

project spatial information of the three-dimensional reconstruction onto the two-dimensional angiographic recording;

detect a variation between the spatial information of the three-dimensional reconstruction and corresponding spatial information of the two-dimensional angiographic recording;

adjust the two-dimensional angiographic recording based on the variation; and

segment the two-dimensional angiographic recording using the spatial information projected onto the two-dimensional angiographic recording,

wherein adjusting the two-dimensional angiographic recording comprises displacing, rotating, or displacing and rotating the two-dimensional angiographic recording, deforming the two-dimensional angiographic recording, or a combination thereof.

15. The examination system of claim 14 , wherein the medical imaging device comprises a computed tomography (CT) device.

16. The examination system of claim 14 , wherein the spatial information comprises at least one centerline of the vessel of the body that is projected onto the two-dimensional angiographic recording, and

wherein the computer is configured to determine, based on the at least one projected centerline, a centerline for the vessel of the body on the two-dimensional angiographic recording and is configured to use the centerline for the vessel of the body in the segmentation.

17. The examination system of claim 16 , wherein the at least one projected centerline is determined as a centerline for the vessel of the body on the recording and is used in the segmentation.

18. The examination system of claim 14 , wherein the spatial information comprises segmentation information of the three-dimensional reconstruction of the vessel of the body.

19. The examination system of claim 14 , wherein the computer is configured to minimize the variation, the minimization of the variation comprising adjustment of the two-dimensional angiographic recording.