Method, an apparatus and a computer program for data processing

• US 8,781,254 B2
• Filed: 11/26/2007
• Issued: 07/15/2014
• Est. Priority Date: 11/28/2006
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Young, Stewart, Bystrov, Daniel, Netsch, Thomas, Kaus, Michael, Pekar, Vladimir
• Primary Examiner(s): TSAI, TSUNG YIN
• Application Number:
  US12/516,357
• Publication Number:
  US 20100061632A1
• Time in Patent Office: 2,423 Days
• Field of Search: None
• US Class Current: 382/291
• CPC Class Codes: G06T 2207/30016 Brain
• CPC Class Codes: G06T 7/12 Edge-based segmentation
• CPC Class Codes: G06T 7/149 involving deformable models, e.g. active contour models
• CPC Class Codes: G06T 7/70 Determining position or orientation of objects or cameras camera calibration G06T7/80

Abstract

A method of data processing is provided for estimating a position of an object in an image from a position of a reference object in a reference image. The method includes learning the position of the reference object in the reference image and its relation to a set of reference landmarks in the reference image, accessing the image, accessing the relation between the position of the reference object and the set of the reference landmarks, identifying a set of landmarks in the image corresponding to the set of the reference landmarks, and applying the relation to the set of landmarks in the image for estimating the position of the object in the image.

Claims

1. A method of data processing for estimating a position of a target object in an acquired image from a position of a reference object corresponding to the target object in a reference image, said method comprising:

learning the position of the reference object in the reference image and relation between the position of the reference object and a set of reference landmarks in the reference image using a processor;

storing the learned relation between the position of the reference object and the set of reference landmarks in a storage unit;

receiving the acquired image;

accessing the previously stored relation between the position of the reference object and the set of the reference landmarks;

identifying a set of landmarks in the acquired image corresponding to the set of the reference landmarks in the reference image; and

applying the accessed relation between the position of the reference object and the set of the reference landmarks to the set of landmarks in the acquired image for estimating the position of the target object in the acquired image using the processor.

2. The method according to claim 1, wherein respective positions of the set of reference landmarks and the set of landmarks in the acquired image are estimated during automated scan planning.

3. The method according to claim 1, wherein the target object comprises a model of a target region in the acquired image.

4. The method according to claim 3, wherein the model comprises a deformable model, said method further comprising:

deforming the model for extracting boundary locations of the target region in the image.

5. The method according to claim 1, wherein the target object comprises an imaging volume in the acquired image.

6. The method according to claim 1, wherein the target object comprises at least one seed point in the acquired image.

7. An apparatus for data processing arranged to estimate a position of a target object in an input image from a position of a reference object corresponding to the target object in a reference image, said apparatus comprising:

a computing means for learning the position of the reference object in the reference image and relation between the position of the reference object and a set of reference landmarks in the reference image;

an input for receiving the input image; and

a processor for accessing the relation between the position of the reference object and the set of reference landmarks, identifying a set of landmarks in the input image corresponding to the set of reference landmarks in the reference image, and applying the accessed relation to the set of landmarks in the input image for estimating the position of the target object in the input image.

8. The apparatus according to claim 7, further comprising:

a data acquisition unit operable in a scanning mode, wherein the processor is further arranged to enable an automated scan planning for the said scanning mode, said automated scan planning being based on the position of the reference object in the reference image.

9. The apparatus according to claim 7, wherein the processor is further arranged to perform image segmentation based on the estimated position of the target object in the input image.

10. The apparatus according to claim 7, further comprising:

a storage unit for storing the position of the reference object in the reference image and the relation between the position of the reference object and the set of reference landmarks.

11. The apparatus according to claim 10, wherein the processor retrieves the relation between the position of the reference object and the set of reference landmarks from the storage unit.

12. A computer readable medium storing a computer program, executable by a processor, for data processing wherein a position of a target object in an input image is estimated from a position of a reference object corresponding to the target object in a reference image, said computer readable medium comprising:

learning code for learning the position of the reference object in the reference image and relation between the position of the reference object and a set of reference landmarks in the reference image;

image accessing code for accessing the input image;

relation accessing code for accessing the learned relation between the position of the reference object and the set of reference landmarks;

identifying code for identifying a set of landmarks in the input image corresponding to the set of reference landmarks; and

applying code for applying the accessed relation between the position of the reference object and the set of the reference landmarks to the set of landmarks in the input image for estimating the position of the target object in the input image.

13. The computer readable medium according to claim 12, further comprising:

scan planning code for performing automated scan planning for estimating respective positions of the set of reference landmarks in the reference image and the set of landmarks in the input image during the automated scan planning.

14. The computer readable medium according to claim 13, further comprising:

segmenting code for segmenting a target based on the position of the target object in the input image.

15. The computer readable medium according to claim 12, further comprising:

storing code for causing the learned relation between the position of the reference object and the set of reference landmarks to be stored in a storage unit.

16. The computer readable medium according to claim 15, wherein the relation accessing code accesses the learned relation between the position of the reference object and the set of reference landmarks from the storage unit.