System and method for locating a target subject

1. A positioning method of an X-ray system, the X-ray system including an X-ray source, a detection component, a positioning component, and a laser emitting component, and the positioning method comprising:

causing the positioning component to be mounted between the detection component and a target subject;

obtaining an overlaid image by overlaying an anatomical image associated with the target subject with a first pattern of the positioning component, the anatomical image being determined by projecting a detection beam towards the target subject by the X-ray source;

determining a lesion point associated with the target subject based on the overlaid image; and

determining a target point corresponding to the lesion point based on the overlaid image and a second pattern that is determined by projecting, by the laser emitting component, a positioning beam to the target subject.

2. The positioning method of the X-ray system of claim 1 , wherein the first pattern or the second pattern includes at least one of grids or closed shapes.

3. The positioning method of the X-ray system of claim 2 , wherein

the grids include at least one of a grid including a regular polygon, a gird including an irregular polygon, or a gird including a circle; or

the closed shapes include at least one of a circle, a regular polygon, or an irregular polygon.

4. The positioning method of the X-ray system of claim 1 , wherein the determining a lesion point associated with the target subject based on the overlaid image includes:

determining a location of the lesion point relative to at least one reference element of the first pattern.

5. The positioning method of the X-ray system of claim 4 , wherein the at least one reference element includes at least one of an intersection point of the first pattern, a line of the first pattern, or a circle of the first pattern.

6. The positioning method of the X-ray system of claim 1 , wherein the target point is on a surface of the target subject corresponding to the lesion point or a point on the second pattern.

7. The positioning method of the X-ray system of claim 1 , wherein the target point is a point where a surgical operation is to be performed.

8. The positioning method of the X-ray system of claim 1 , wherein the determining a target point corresponding to the lesion point based on the overlaid image and a second pattern that is determined by projecting, by the laser emitting component, a positioning beam to the target subject includes:

determining the target point corresponding to the lesion point based on the overlaid image and a relationship between the first pattern and the second pattern.

9. The positioning method of the X-ray system of claim 8 , wherein the first pattern includes a plurality of first shapes.

10. The positioning method of the X-ray system of claim 9 , wherein the second pattern includes a plurality of second shapes.

11. The positioning method of the X-ray system of claim 10 , wherein the relationship between the first pattern and the second pattern includes a ratio of a size of one of the plurality of first shapes to a size of one of the plurality of second shapes.

12. The positioning method of the X-ray system of claim 11 , wherein the relationship between the first pattern and the second pattern includes at least one of an inverse proportional relationship or a logarithmic relationship.

13. The positioning method of the X-ray system of claim 1 , wherein the positioning component is situated on a surface of the detection component facing a platform on which the target subject is placed.

14. The positioning method of the X-ray system of claim 1 , wherein the second positioning component is made of soft metal.

15. An X-ray system, comprising:

an X-ray source configured to emit an X-ray beam towards a target subject;

a detection component configured to receive at least a portion of the X-ray beam that transmits through the target subject;

a positioning component being situated between the detection component and the target subject; and

a laser emitting component configured to emit a laser beam, wherein the X-ray system is configured to determine a target point by

generating an overlaid image by overlaying an anatomical image associated with the target subject with a first pattern of the positioning component, the anatomical image being determined by projecting a detection beam towards the target subject by the X-ray source; and

determining the target point corresponding to the lesion point based on the overlaid image and a second pattern, the second pattern being determined by projecting, by the laser emitting component, a positioning beam to the target subject.

16. The X-ray system of claim 15 , wherein the X-ray system is configured to determine the target point corresponding to the lesion point based on the overlaid image and a relationship between the first pattern and the second pattern.

17. The X-ray system of claim 16 , wherein the first pattern includes a plurality of first shapes.

18. The X-ray system of claim 17 , wherein the second pattern includes a plurality of second shapes.

19. The X-ray system of claim 18 , wherein the relationship between the first pattern and the second pattern includes a ratio of a size of one of the plurality of first shapes to a size of one of the plurality of second shapes.

20. The X-ray system of claim 19 , wherein the relationship between the first pattern and the second pattern includes at least one of an inverse proportional relationship or a logarithmic relationship.