Granted Patent B2

US 9,934,598 · App. 14/628,546 · Granted Apr 3, 2018

Abstract

Claims (43)

1. A diagnostic imaging apparatus comprising:

at least one memory configured to store at least one instruction; and

at least one processor configured to

acquire a first image obtained by imaging an object in a first section of a first cycle having a first angular section less than 180 degrees and a second image obtained by imaging the object in a second section having a second angular section less than 180 degrees corresponding to the first section which has a same position in a second cycle as that of the first section of the first cycle, wherein the first angular section and the second angular section include at least one of a symmetrical angular section and an identical angular section,

extract information about a movement between the first cycle and the second cycle by comparing the first image and the second image,

change one of the first image and the second image based on the extracted movement information, and

generate a reconstructed image by summing pixel values respectively forming the changed one image and the unchanged image of the first image and the second image,

wherein the pixel value comprises shading information.

2. The diagnostic imaging apparatus of claim 1 , wherein the at least one processor determines a common object included in the first image and the second image and the information about the movement is determined based on a difference of at least one of a shape, position, and size of the determined common object between the first image and the second image.

3. The diagnostic imaging apparatus of claim 1 , wherein the at least one processor compares projection data included in the first image and projection data included in the second image and determines a motion vector for making a similarity value between the first image and the second image to be more than a reference value, based on a result of the comparison.

4. The diagnostic imaging apparatus of claim 1 , wherein each of a size of a first angular section where the first image is formed and a size of a second angular section where the second image is formed is less than 180°.

5. The diagnostic imaging apparatus of claim 1 , wherein the at least one processor acquires at least one image obtained by imaging the object in each section corresponding to the first section of at least one of other cycles, and

the image reconstructor reconstructs an image of the object based on a difference among a plurality of images obtained by imaging the object.

6. The diagnostic imaging apparatus of claim 5 , further comprising an input providing a user interface which enables selection of two or more images of the plurality of images,

wherein the at least one processor generates the reconstructed image of the object based on a difference between two or more images selected by the user.

7. The diagnostic imaging apparatus of claim 6 , wherein the user interface displays angular sections where the plurality of images are formed, with the plurality of images.

8. The diagnostic imaging apparatus of claim 1 , further comprising a display displaying an image reconstructed from the first image and the second image.

9. The diagnostic imaging apparatus of claim 1 , wherein the adjusting the difference between the first image and the second image comprises at least one of expanding, contracting, moving, and rotating at least one of the first image and the second image.

10. The diagnostic imaging apparatus of claim 1 , wherein the adjusting the difference between the first image and the second image comprises changing the position of at least one of the first image and the second image based on a common object having a clear edge that is included in the first image and the second image.

11. A diagnostic imaging method comprising:

acquiring a first image obtained by imaging an object in a first section of a first cycle having a first angular section less than 180 degrees;

acquiring a second image obtained by imaging the object in a second section having a second angular section less than 180 degrees corresponding to the first section which has a same position in a second cycle as that of the first section of the first cycle, wherein the first angular section and the second angular section include at least one of a symmetrical angular section and an identical angular section;

extracting information about a movement between the first cycle and the second cycle by comparing the first image and the second image;

changing one of the first image and the second image based on the extracted movement information; and

generating, by at least one processor, a reconstructed image by summing pixel values respectively forming the changed one image and the unchanged image of the first image and the second image,

wherein the pixel value comprises shading information.

12. The diagnostic imaging method of 11 , wherein the extracting of the information about a movement comprises:

determining a common object included in the first image and the second image,

wherein the information about the movement is determined based on a difference of at least one of a shape, position, and size of the determined common object between the first image and the second image.

13. The diagnostic imaging method of claim 11 , wherein the extracting of the information about a movement comprises:

comparing projection data included in the first image and projection data included in the second image; and

determining a motion vector for making a similarity value between the first image and the second image to be more than a reference value, based on a result of the comparison.

14. The diagnostic imaging method of claim 11 , wherein each of a size of a first angular section where the first image is formed and a size of a second angular section where the second image is formed is less than 180°.

15. The diagnostic imaging method of claim 11 , further comprising:

acquiring at least one image obtained by imaging the object in each section corresponding to the first section of at least one other cycle, and

reconstructing an image of the object based on a difference among a plurality of images obtained by imaging the object.

16. The diagnostic imaging method of claim 15 , further comprising:

providing a user interface which enables selection of two or more images of the plurality of images; and

reconstructing an image of the object based on a difference between the two or more images selected by the user.

17. The diagnostic imaging method of claim 16 , wherein the user interface displays angular sections where the plurality of images are formed, with the plurality of images.

18. The diagnostic imaging method of claim 11 , further comprising displaying an image reconstructed from the first image and the second image.

19. The diagnostic imaging method of claim 11 , wherein the adjusting the difference between the first image and the second image comprises at least one of expanding, contracting, moving, and rotating at least one of the first image and the second image.

20. The diagnostic imaging method of claim 11 , wherein the adjusting the difference between the first image and the second image comprises changing the position of at least one of the first image and the second image based on a common object having a clear edge that is included in the first image and the second image.

Assignments (6)