Method for displaying temporal changes in spatially matched images

• US 6,771,736 B2
• Filed: 07/25/2002
• Issued: 08/03/2004
• Est. Priority Date: 07/25/2002
• Status: Expired due to Fees

• Current Assignee: GE Medical Systems Global Technology Company LLC (GE Healthcare Technologies, Inc.)
• Original Assignee: GE Medical Systems Global Technology Company LLC (GE Healthcare Technologies, Inc.)
• Inventors: Jabri, Kadri Nizar, Uppaluri, Renuka, Battle, Vianney Pierre, Avinash, Gopal B., Sabol, John M.
• Primary Examiner(s): BRUCE, DAVID VERNON
• Application Number:
  US10/064,548
• Publication Number:
  US 20040017892A1
• Time in Patent Office: 740 Days
• Field of Search: 378/4, 378/8, 378/15, 378/62, 378/98.2, 378/98.12, 378/901
• US Class Current: 378/98.12
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61B 6/488 involving pre-scan acquisition
• CPC Class Codes: G06T 11/005 Specific pre-processing for tomographic reconstruction, e.g. calibration, source positioning, rebinning, scatter correction, retrospective gating
• CPC Class Codes: G06T 2211/412 Dynamic
• CPC Class Codes: G06T 7/254 involving subtraction of images
• CPC Class Codes: G06T 7/30 Determination of transform parameters for the alignment of images, i.e. image registration
• CPC Class Codes: Y10S 378/901 Computer tomography program or processor

Abstract

A temporal image processing system includes a temporal processing controller receiving at least two images temporally spaced apart, from a scanning unit. The temporal processing controller includes a registration module, which registers a region of interest within the images and generates therefrom a registration signal. The temporal processing controller further includes a confidence module receiving the registration signal and generating a confidence map therefrom. The confidence map enhances contrast of temporal changes in the object relative to a contrast due to misregistrations.

Claims

1. A temporal image processing system comprising:

a temporal processing controller adapted to receive a first image signal and a second image signal from a scanning unit,

said temporal processing controller comprising a registration module adapted to register a region of interest of said first image signal and said second image signal, said registration module further adapted to generate therefrom a registration signal, said temporal processing controller further comprising a confidence module adapted to receive said registration signal and further adapted to determine a confidence map therefrom, said confidence map adapted to enhance a contrast of a temporal change in said object relative to a contrast due to at least one misregistration.

2. The system of claim 1, wherein for said region of interest comprising a minor region of said object, at least one rigid body registration transformation including at least one of translation, rotation, magnification, or shearing is a criterion used to register said first image signal and said second image signal.

3. The system of claim 1, wherein for said region of interest including a major region of said object, at least one warped transformation is a criterion used to register said first image signal and said second image signal.

4. The system of claim 3, wherein said at least one warped transformation is implemented through multi-region, multi-scale, pyramidal logic designed such that a different cost function is adapted to highlight changes between said first image signal and said second image signal for a plurality at each of a plurality of scales.

5. The system of claim 4, wherein said cost function includes at least one of mathematical correlation, sign-change measurement, or statistical analysis.

6. The system of claim 1, wherein said confidence module is adapted to receive at least one of said cost function and a figure of merit of said cost function, said confidence module further adapted to generate said confidence map therefrom.

7. The system of claim 1, wherein said confidence module is adapted to distinguish whether a difference between said first image signal and said second image signal is resultant from an anatomical change or said at least one misregistration.

8. The system of claim 1, further comprising a sensitivity metric adapted to regulate a relative importance of said confidence map.

9. A temporal image processing method comprising:

scanning an object and generating a first image signal and a second image signal therefrom;

receiving said first image signal and said second image signal in a registration module;

registering at least one region of interest of said first image signal and said second image signal such that at least one cost signal is generated;

generating a confidence map from said cost signal thereby enhancing a temporal change contrast between said first image signal and said second image signal; and

generating at least one distinguishing characteristic between a contrast of temporal changes between said first image signal and said second image signal and a contrast resultant from at least one misregistration.

10. The method of claim 9 wherein generating further comprises generating a first image signal including a one-dimensional image, two-dimensional image, three-dimensional image, one-dimensional montage image, two-dimensional montage image, or three-dimensional montage image.

11. The method of claim 9 wherein generating a confidence map further comprises generating a confidence map from a cost function or figure of merit of said cost function.

12. The method of claim 9 wherein registering further comprises registering a minor region of interest of said object within said first image signal and said second image signal with at least one of translation criteria, rotation criteria, magnification criteria, or shearing criteria.

13. The method of claim 9 wherein registering further comprises registering a major region of interest of said object within said first image signal and said second image signal through at least one warped transformation criterion.

14. The method of claim 13 wherein registering further comprises registering a major region of interest of said object within said first image signal and said second image signal through at least one warped transformation criterion including multi-region, multi-scale, pyramidal logic;

and

highlighting changes between said first image signal and said second image signal with a different cost function at each of a plurality of scales.

15. The method of claim 14, wherein said cost function includes at least one of mathematical correlation, sign-change measurement, or statistical analysis.

16. The method of claim 9 wherein generating a confidence map from said cost signal further comprising receiving in said confidence module at least one of a cost function or a figure of merit of said cost function;

and

generating a confidence map from said at least one of said cost function or a figure of merit of said cost function.

17. The system of claim 9, further comprising illustrating a difference between said first image signal and said second image signal according to whether said difference is resultant from an anatomical change or said at least one misregistration.

18. The system of claim 9, further comprising regulating a relative importance of said confidence map with a sensitivity metric, which is either embedded or adapted for user operation.

19. A temporal image processing system comprising:

a scanning unit adapted to scan an object and generate a first image signal and a second image signal of said object; and

an image controller coupled to said scanning unit and adapted to receive said first image signal and said second image signal,

said image controller comprising a temporal processing controller adapted to receive said first image signal and said second image signal in a registration module, register at least one region of interest of said first image signal and said second image signal such that at least one cost signal is generated,

generate a confidence map from said cost signal thereby enhancing a temporal change contrast between said first image signal and said second image signal, and generate at least one distinguishing characteristic between a contrast of temporal changes between said first image signal and said second image signal and a contrast resultant from at least one misregistration.

20. The system of claim 19, wherein said scanning unit comprises one of a CT scanning unit, an x-ray scanning unit, an MRI scanning unit, a PET, a radionuclide imaging system, an ultrasound imaging unit, or an optical imaging unit.