X-ray system and method for processing image data

• US 8,768,035 B2
• Filed: 04/27/2011
• Issued: 07/01/2014
• Est. Priority Date: 04/27/2011
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Liu, James Zhengshe, Granfors, Paul Richard, Kump, Kenneth Scott, Xue, Ping, Langler, Donald Fayette, Kost, Brian John
• Primary Examiner(s): Koziol, Stephen R
• Assistant Examiner(s): Azima, Shaghayegh
• Application Number:
  US13/095,655
• Publication Number:
  US 20120275678A1
• Time in Patent Office: 1,161 Days
• Field of Search: 382/130, 382/131, 378/62, 378/98.11, 378/98.12
• US Class Current: 382/132
• CPC Class Codes: A61B 6/585 Calibration of detector units
• CPC Class Codes: H04N 25/63 applied to dark current
• CPC Class Codes: H04N 5/32 Transforming X-rays cameras or camera modules for generating image signals from X-rays H04N23/30; circuitry of SSIS for transforming X-rays into image signals H04N25/30

Abstract

A method for processing X-ray image data includes exposing a digital detector to X-ray radiation. The method also includes sampling data via the digital detector including X-ray image data and offset image data. The method further includes calculating an average offset image without prior knowledge of a total number of offset image frames sampled.

Claims

1. A method for processing X-ray image data, comprising:

exposing a digital detector to X-ray radiation;

sampling data via the digital detector including X-ray image data and offset image data, wherein the X-ray image data includes anatomical image data of a subject;

determining if a sampled imaging frame includes X-ray image data having anatomical image data;

designating the sampled imaging frame as an offset image frame for inclusion in calculating an average offset image if the sampled imaging frame does not include X-ray image data having anatomical image data; and

calculating the average offset image from one or more offset image frames without prior knowledge of a total number of offset image frames sampled if the sampled imaging frame includes X-ray image data having anatomical image data.

2. The method of claim 1, comprising preparing the detector by sampling data prior to exposing the digital detector to the X-ray radiation.

3. The method of claim 2, wherein preparing the detector comprises beginning sampling data prior to and independent of exposing the digital detector to the X-ray radiation.

4. The method of claim 1, wherein calculating the average offset image without prior knowledge of the total number of offset image frames occurs as each offset image frame is designated.

5. The method of claim 1, wherein calculating the average offset image without prior knowledge of the total number of offset image frames occurs subsequent to sampling the total number of offset image frames.

6. The method of claim 1, comprising generating an offset corrected image based on at least one sampled imaging frame including X-ray image data having anatomical image data and the average offset image.

7. The method of claim 1, wherein the digital detector is configured to calculate the average offset image.

8. The method of claim 1, wherein a processing system in communication with the detector is configured to calculate the average offset image.

9. A method for processing X-ray image data,

comprising:

sampling data via a digital detector including X-ray image data and offset image data, wherein the X-ray image data includes anatomical image data of a subject and the offset image data does not include anatomical image data of the subject;

determining if sampled imaging frames include X-ray image data having anatomical image data; and

calculating an average offset image from one or more offset image frames of the offset image data without prior knowledge of a total number of offset image frames sampled if a sampled imaging frame includes X-ray image data having anatomical image data.

10. The method of claim, 9 comprising designating sampled imaging frames as offset image frames for inclusion in calculating the average offset image if the sampled imaging frames do not include X-ray image data having anatomical image data.

11. The method of claim 9, comprising generating an offset correct image based on at least one sampled imaging frame including X-ray image data having anatomical image data and the average offset image.

12. The method of claim 9, comprising preparing the detector by sampling data prior to exposing the digital detector to X-ray radiation.

13. The method of claim 10, wherein preparing the detector comprises beginning sampling data prior to and independent of exposing the digital detector to the X-ray radiation.

14. The method of claim 9, wherein calculating the average offset image without prior knowledge of the total number of offset image frames occurs as each offset image frame is sampled.

15. The method of claim 9, wherein calculating the average offset corrected image without prior knowledge of the total number of offset image frames occurs subsequent to sampling the total number of offset image frames.

16. An X-ray imaging system, comprising:

an X-ray radiation source;

a digital detector configured to receive X-ray radiation from the source and to sample data including X-ray image data and offset image data, wherein the X-ray image data includes anatomical image data of a subject; and

processing circuitry configured to;

determine if a sampled imaging frame includes X-ray image data having anatomical image data;

designate the sampled imaging frame as an offset image frame for inclusion in calculating an average offset image if the sampled imaging frame does not include X-ray image data having anatomical image data; and

calculate the average offset image from one or more offset image frames without prior knowledge of a total number of offset image frames sampled if the sampled imaging frame includes X-ray image data having anatomical image data.

17. The system of claim 16, wherein the detector comprises the processing circuitry.

18. The system of claim 17, wherein a processing system separate from the digital detector and in communication with the digital detector comprises the processing circuitry.

19. The system of claim 16, wherein the processing circuitry is configured to calculate the average offset image without prior knowledge of the total number of offset image frames as each offset image frame is designated.

20. The system of claim 16, wherein the processing circuitry is configured to calculate the average offset image without prior knowledge of the total number of offset image frames subsequent to sampling the total number of offset image frames.

21. The system of claim 16, wherein the processing circuitry is configured to generate an offset corrected image based on at least one sampled imaging frame including X-ray image data having anatomical image data and the average offset image.