Methods and apparatuses for creating orientation markers and 3D ultrasound imaging systems using the same

1. A method for providing an orientation marker in a display of a three-dimensional (3D) ultrasound imaging system, the method comprising:

scanning an ultrasound imaging space using scanning parameters to obtain original volume data;

reconstructing the original volume data to obtain a 3D image of a target in the ultrasound imaging space;

obtaining a section image of the target based on the original volume data or the 3D image;

displaying the 3D image in a 3D view direction;

displaying the section image in a section view direction;

building a first geometric model representing the ultrasound imaging space based on the scanning parameters;

obtaining section parameters of a section window in which the section image is displayed;

building a section geometric model based on the section parameters; and

displaying an orientation marker by drawing the first geometric model according to the 3D viewing direction and drawing the section geometric model according to the section viewing direction, wherein a spatial position relationship between the first geometric model and the section geometric model of the orientation marker indicates a spatial position relationship between the 3D image and the section image.

2. The method of claim 1 , wherein building a first geometric model representing the ultrasound imaging space based on the scanning parameters comprises:

determining one or more types of surfaces of the first geometric model according to the scanning parameters; and

calculating equations of the surfaces of the first geometric model based on the one or more types of the surfaces and the scanning parameters.

3. The method of claim 1 , wherein building a section geometric model based on the section parameters comprises:

determining a shape of the section window; and

calculating equations of sides of the section geometric model based on the shape of the section window.

4. The method of claim 3 , wherein determining the shape of the section window further comprises:

receiving interaction information generated from user interaction with the shape of the section window; and

updating the shape of the section window according to the interaction information.

5. The method of claim 1 , wherein displaying the 3D image in a 3D view direction further comprises:

receiving interaction information generated from user interaction with the 3D image; and

updating the 3D viewing direction according to the interaction information.

6. The method of claim 1 , wherein displaying the section image in a section view direction comprises:

receiving interaction information generated from user interaction with the section image;

updating the section viewing direction according to the interaction information.

7. The method of claim 1 , further comprising:

determining at least one material for rendering; and

rendering at least one surface of the first geometric model and the section geometric model of the orientation marker using the material.

8. The method of claim 7 , further comprising rendering at least two surfaces of the first geometric model and the section geometric model of the orientation marker using different materials.

9. The method of claim 1 , further comprising:

determining one or more deflection angles relative to the 3D viewing direction; and

obtaining an orientation markers viewing direction by deflecting the 3D viewing direction with the one or more deflection angles.

10. The method of claim 1 , wherein the first geometric model is an icon which is separate from the 3D image.

11. The method of claim 1 , wherein the section geometric model is displayed in the first geometric model.

12. A three-dimensional (3D) ultrasound imaging system comprising:

a probe used to scan an ultrasound imaging space using scanning parameters to obtain original volume data; and

one or more processors configured to:

reconstruct the original volume data to obtain a 3D image of a target in the ultrasound imaging space;

build a first geometric model representing the ultrasound imaging space based on the scanning parameters;

obtain a section image of the target based on the original volume data or the 3D image;

obtain section parameters of a section window in which the section image is displayed and build a section geometric model based on the section parameters; and

obtain an orientation marker by drawing the first geometric model according to a 3D viewing direction and drawing the section geometric model according to a section viewing direction, wherein a spatial position relationship between the first geometric model and the section geometric model of the orientation marker indicates a spatial position relationship between the 3D view and the section view; and

a monitor which displays the orientation marker and displays the 3D image in the 3D view direction and the section image in the section view direction.

13. The system of claim 12 , wherein the one or more processors are further configured to:

determine one or more types of surfaces of the first geometric model according to the scanning parameters; and

calculate equations of the surfaces of the first geometric model based on the one or more types of the surfaces and the scanning parameters.

14. The system of claim 12 , wherein the one or more processors are further configured to:

determine a shape of the section window; and

calculate equations of sides of the section geometric model based on the shape of the section window.

15. The system of claim 14 , wherein the one or more processors are further configured to:

receive interaction information generated from user interaction with the shape of the section view and update the section viewing direction according to the interaction information.

16. The system of claim 12 , wherein the one or more processors are further configured to:

receive interaction information generated from user interaction with the 3D view and update the 3D viewing direction according to the interaction information.

17. The system of claim 12 , wherein the one or more processors are further configured to:

receive interaction information generated from user interaction with the section view and update the section viewing direction according to the interaction information.

18. The system of claim 12 , wherein the one or more processors are further configured to:

determine at least one material for rendering and render at least one surface of the first geometric model and the section geometric model of the orientation marker using the at least one material.

19. The system of claim 12 , wherein the one or more processors are further configured to:

determine one or more deflection angles relative to the 3D viewing direction; and

obtain an orientation markers viewing direction by deflecting the 3D viewing direction with the one or more deflection angles.

20. A method for providing an orientation marker in a display of a three-dimensional (3D) ultrasound imaging system, the method comprising:

obtaining scanning parameters;

building a first geometric model based on the scanning parameters, wherein the first geometric model is an icon which is separate from a 3D image of a target in an ultrasound imaging space and represents the ultrasound imaging space;

determining a 3D viewing direction of the 3D image;

obtaining section parameters of a section window in which a section image of the target is displayed;

determining a section viewing direction of the section image;

building a section geometric model based on the section parameters;

displaying an orientation marker by drawing the first geometric model according to the 3D viewing direction and drawing the section geometric model according to the section viewing direction in the first geometric model, wherein a spatial position relationship between the first geometric model and the section geometric model of the orientation marker indicates a spatial position relationship between the 3D image and the section image.

21. The method of claim 20 , wherein the first geometric model has different shapes for different scanning modes.

22. The method of claim 20 , wherein the first geometric model is a hexahedron.