METHOD AND APPARATUS FOR RECONSTRUCTING AN IMAGE

• US 20100201786A1
• Filed: 05/03/2007
• Published: 08/12/2010
• Est. Priority Date: 05/11/2006
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Grass, Michael, Schaefer, Dirk
• Application Number:
  US12/300,185
• Publication Number:
  US 20100201786A1
• Time in Patent Office: Days
• US Class Current: 348/47
• CPC Class Codes: G06T 2207/30101 Blood vessel; Artery; Vein; Vascular
• CPC Class Codes: G06T 7/30 Determination of transform parameters for the alignment of images, i.e. image registration

Abstract

A reconstruction method for an image of an object under examination is provided, wherein the method comprises, receiving a first projection data set representing three-dimensional information about said object under examination and reconstructing at least one three-dimensional image out of the first projection data set. Further, a second projection data set representing two-dimensional information about the object under examination is received, wherein the second data set was recorded under a first direction and wherein a two-dimensional image out of the second projection data set is generated. Furthermore, a volume rendered projection is reconstructed out of the at least one three-dimensional image using the first direction as the reconstruction direction of the volume rendered projection and the two-dimensional image and the volume rendered projection are overlaid.

Claims

1. A reconstruction method for an image of an object under examination, the method comprising:

receiving a first projection data set representing three-dimensional information about said object under examination;

reconstructing at least one three-dimensional image out of the first projection data set;

receiving a second projection data set representing two-dimensional information about the object under examination, wherein the second data set was recorded at a first direction;

reconstructing a volume rendered projection out of the at least one three-dimensional image using the first direction as the reconstruction direction of the volume rendered projection;

generating a two-dimensional image out of the second projection data set; and

overlaying the two-dimensional image and the volume rendered projection.

2. The reconstruction method according claim 1,

wherein the first projection data set is recorded by an X-ray C-arm.

3. The reconstruction method according claim 1 or 2,

wherein the volume rendered projection is a Maximum Intensity Projection.

4. The reconstruction method according to anyone of the preceding claims;

wherein the first projection data set was recorded at a time the object under examination was under influence of a contrast agent.

5. The reconstruction method according to anyone of the preceding claims;

wherein the second projection data set was recorded at a time the object under examination was not under influence of a contrast agent.

6. The reconstruction method according to anyone of the preceding claims:

further comprising;

performing a registration of the volume rendered projection and the two-dimensional image before overlaying the both.

7. The reconstruction method to anyone of the preceding claims, further comprising:

receiving a third data set representing motion related information of the object under examination.

8. The reconstruction method according claim 7,

wherein the third data set represents a periodic motion.

9. The reconstruction method according to claim 7 or 8,

wherein each three-dimensional image is motion compensated in particular by using the motion information of the third data set.

10. The reconstruction method according to anyone of the preceding claims,

wherein the reconstruction of the at least one three-dimensional image is done by using a filtered back-projection algorithm.

11. The reconstruction method according to anyone of the preceding claims, further comprising:

reconstructing a plurality of three-dimensional images out of the first projection data set.

12. The reconstruction method according claim 11,

wherein each of the plurality of three-dimensional images is associated to a specific motion state of the object under examination.

13. The reconstruction method according to claim 12,

wherein the volume rendered projection and the two dimensional image are associated to the same motion state of the object under examination.

14. Imaging method for an object under examination, the method comprising:

recording a first projection data set representing three-dimensional information about said object under examination;

recording a second projection data set representing two-dimensional information about the object under examination, wherein the second data set is recorded under a first direction; and

the reconstruction method according to anyone of the claims 1 to 13.

15. Apparatus for reconstructing an image of an object under examination, the apparatus comprising:

a receiving unit;

a reconstruction unit; and

an overlaying unit;

wherein the receiving unit is adapted to receive a first projection data set representing three-dimensional information about said object under examination and to receive a second projection data set representing two-dimensional information about the object under examination, wherein the second data set was recorded under a first direction;

wherein the reconstructing unit is adapted to reconstruct at least one three-dimensional image out of the first projection data set, wherein the reconstruction unit is further adapted to reconstruct a volume rendered projection out of the at least one three-dimensional image using the first direction as the reconstruction direction of the volume rendered projection and to generate a two-dimensional image out of the second projection data set; and

wherein the overlaying unit is adapted to overlay the two-dimensional image and the volume rendered projection.

16. System for generating an image of an object under examination, the system comprising:

a first scanning unit;

a second scanning unit; and

an apparatus for reconstructing an image according to claim 15,

wherein the first scanning unit is adapted to record a first projection data set representing three-dimensional information about said object under examination; and

wherein the second scanning unit is adapted to record a second projection data set representing two-dimensional information about the object under examination, wherein the second data set was recorded at a first direction.

17. The system according claim 16;

wherein the first scanning unit is an X-ray C-arm, and/or

wherein the second scanning unit is a fluoroscopy apparatus.

18. A computer readable medium in which a program for reconstructing an image of an object under examination is stored, which program, when executed by a processor, is adapted to control a method comprising:

receiving a first projection data set representing three-dimensional information about said object under examination;

reconstructing at least one three-dimensional image out of the first projection data set;

receiving a second projection data set representing two-dimensional information about the object under examination, wherein the second data set was recorded at a first direction;

reconstructing a volume rendered projection out of the at least one three-dimensional image using the first direction as the reconstruction direction of the volume rendered projection;

generating a two-dimensional image out of the second projection data set; and

overlaying the two-dimensional image and the volume rendered projection.

19. A program element for reconstructing an image of an object under examination, which program, when executed by a processor, is adapted to control a method comprising:

receiving a first projection data set representing three-dimensional information about said object under examination;

reconstructing at least one three-dimensional image out of the first projection data set;

receiving a second projection data set representing two-dimensional information about the object under examination, wherein the second data set was recorded at a first direction;

reconstructing a volume rendered projection out of the at least one three-dimensional image using the first direction as the reconstruction direction of the volume rendered projection;

generating a two-dimensional image out of the second projection data set; and

overlaying the two-dimensional image and the volume rendered projection.