Color parametric and composite maps for CT perfusion

• US 6,650,928 B1
• Filed: 11/27/2000
• Issued: 11/18/2003
• Est. Priority Date: 11/27/2000
• Status: Expired due to Term

• 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: Senzig, Robert, Gailly, Jean-Loup
• Primary Examiner(s): PELHAM, JOSEPH MOORE
• Application Number:
  US09/723,128
• Time in Patent Office: 1,086 Days
• Field of Search: 600/425, 600/427, 600/431, 128/922, 382/128
• US Class Current: 600/425
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61B 6/481 involving the use of contrast agents
• CPC Class Codes: A61B 6/504 for diagnosis of blood vessels, e.g. by angiography
• CPC Class Codes: A61B 6/507 for determination of haemodynamic parameters, e.g. perfusion CT
• CPC Class Codes: Y10S 128/922 including image analysis

Abstract

The present invention is, in one embodiment, a method for facilitating the analysis of computed tomographic (CT) images. The method includes steps of: acquiring attenuation data of a patient using a CT imaging system; reconstructing images of the patient using the acquired attenuation data; mapping intensity data from at least one reconstructed image into a color image using a color mapping indicative of physiological thresholds; and displaying the color image.

Embodiments of the present invention facilitate the assessment of images and differences between images for functional image data and for perfusion-related imaging data.

Claims

1. A method for facilitating the analysis of computed tomographic (CT) images, comprising:

acquiring attenuation data including CT perfusion functional data of a patient using a CT imaging system;

reconstructing images of the patient using the acquired attenuation data;

mapping intensity data from at least one reconstructed image into a color CT perfusion parametric image using a color mapping indicative of physiological thresholds, wherein said mapping uses at least one of a rainbow color mapping, a three color mapping, a “

Hot Iron”

color mapping, and a “

Puh Thallium”

mapping; and

displaying the color CT perfusion parametric image.

2. A method in accordance with claim 1 wherein said step of displaying a color CT perfusion parametric image comprises the step of displaying differences in measurements of a member of the group consisting of blood flow, blood volume, and mean transit time for movement of blood.

3. A method in accordance with claim 1 wherein said mapping uses a rainbow color mapping.

4. A method in accordance with claim 1 wherein said mapping uses a three color mapping.

5. A method in accordance with claim 1 wherein said mapping uses a “

Hot Iron”

color mapping.

6. A method in accordance with claim 1 wherein said mapping uses a “

Puh Thallium”

color mapping.

7. A method in accordance with claim 1 wherein said step of displaying a color CT perfusion parametric image comprises the step of overlaying two CT images.

8. A method in accordance with claim 7 wherein said step of overlaying two CT image comprises the step of overlaying an image representative of parametric data over an anatomical image.

9. A method in accordance with claim 8 further comprising the step of adjusting opacity of the overlaid image.

10. A method in accordance with claim 1 wherein said mapping uses a rainbow color mapping indicative of ischemia areas.

11. A method in accordance with claim 1 wherein said mapping uses a three-color color map indicative of damaged, healthy, and hyper-vascularized tissue.

12. A method in accordance with claim 3 wherein said mapping uses an inverse rainbow color map emphasizing areas with longer transit times.

13. A computed tomographic (CT) imaging system comprising a color display, a rotating gantry, a radiation source on the rotating gantry, and a detector array opposite the radiation source on the rotating gantry, said detector array configured to acquire attenuation data including CT perfusion functional data from radiation emitted by said radiation source and passing through a patient between said radiation source and said detector array, said CT imaging system configure to:

reconstruct images of the patient using said acquired attenuation data;

map intensity data from at least one said reconstructed image into a color CT perfusion parametric image using a color mapping indicative of physiological thresholds, wherein said mapping uses at leasts one of a rainbow color mapping, a three color mapping, a “

Hot Iron”

color mapping, and a “

Puh Thallium”

mapping; and

display the color CT perfusion parametric image on said color display.

14. A CT imaging system in accordance with claim 13 wherein to display said color CT perfusion parametric image, said imaging system is configured to display differences in measurements of a member of the group consisting of blood flow, blood volume, and mean transit time for movement of blood.

15. A CT imaging system in accordance with claim 13 configured to map intensity data using a rainbow color mapping.

16. A CT imaging system in accordance with claim 13 configured to map intensity data using a three color mapping.

17. A CT imaging system in accordance with claim 13 configured to map intensity data using a “

Hot Iron”

color mapping.

18. A CT imaging system in accordance with claim 13 configured to map intensity data using a “

Puh Thallium”

color mapping.

19. A CT imaging system in accordance with claim 13 wherein to display a color CT perfusion parametric image, said CT imaging system is configured to overlay two CT images.

20. A CT imaging system in accordance with claim 19 wherein to overlay two CT images, said CT imaging system is configured to overlay an image representative of parametric data over an anatomical image.

21. A CT imaging system in accordance with claim 20 further configured to adjust opacity of the overlaid image.

22. A CT imaging system in accordance with claim 13 configured to utilize a rainbow color mapping indicative of ischemia areas.

23. A method in accordance with claim 13 configured to utilize a three-color color map indicative of damaged, healthy, and hyper-vascularized tissue.

24. A method in accordance with claim 13 configured to utilize an inverse rainbow color map emphasizing areas with longer transit times.

25. A method for facilitating the analysis of computed tomographic (CT) images, comprising the steps of:

acquiring attenuation data including CT perfusion functional data of a patient using a CT imaging system;

reconstructing a plurality of images of the patient using the acquired attenuation data;

mapping intensity data from the plurality of reconstructed images into a plurality of color CT perfusion parametric images using a color mapping indicative of physiological thresholds, a “

Hot Iron”

color mapping, and a “

Puh Thallium”

mapping; and

combining the plurality of color CT perfusion parametric images to produce a 3D image showing 3D CT perfusion functional data in color.

26. A method in accordance with claim 25 wherein the 3D image is a perspective image.

27. A computed tomographic (CT) imaging system comprising a color display, a rotating gantry, a radiation source on the rotating gantry, and a detector array opposite the radiation source on the rotating gantry, said detector array configured to acquire attenuation data including CT perfusion functional data from radiation emitted by said radiation source and passing through a patient between said radiation source and said detector array, said CT imaging system configured to:

reconstruct a plurality of images of the patient using said acquired attenuation data including CT perfusion functional data;

map intensity data from said plurality of reconstructed images into a plurality of color CT perfusion parametric images using a color mapping indicative of physiological thresholds, wherein said mapping uses at least one of a rainbow color mapping, a three color mapping, a “

Hot Iron”

color mapping, and a “

Puh Thallium”

mapping;

combine the plurality of color CT perfusion parametric images to produce a 3D image showing 3D CT perfusion functional data in color; and

display said 3D image on said color display.

28. A CT imaging system in accordance with claim 27 wherein said 3D image is a perspective image.