Image data based retrospective temporal selection of medical images

• US 7,031,504 B1
• Filed: 09/26/2000
• Issued: 04/18/2006
• Est. Priority Date: 09/26/2000
• Status: Expired due to Term

• Current Assignee: Canon Medical Systems Corporation (Canon Inc.)
• Original Assignee: Vital Images Incorporated (Canon Inc.)
• Inventors: Johnson, Todd, Brejl, Marek, Brejl, Milan, Rashid, Renee Maheshwari, Argiro, Vincent J.
• Primary Examiner(s): Mancuso, Joseph
• Assistant Examiner(s): GORADIA, SHEFALI DINESH
• Application Number:
  US09/669,395
• Time in Patent Office: 2,030 Days
• Field of Search: 382/282, 382/131, 382/132, 382/209, 382219-221, 382/274, 382/264, 382/173, 382128-134, 600/479, 600/481, 600/513
• US Class Current: 382/131
• CPC Class Codes: A61B 5/7289 Retrospective gating, i.e. associating measured signals or images with a physiological event after the actual measurement or image acquisition, e.g. by simultaneously recording an additional physiological signal during the measurement or image acquisition
• CPC Class Codes: A61B 6/504 for diagnosis of blood vessels, e.g. by angiography
• CPC Class Codes: A61B 6/5288 involving retrospective matching to a physiological signal
• CPC Class Codes: A61B 6/541 involving acquisition triggered by a physiological signal
• CPC Class Codes: G06F 18/00 Pattern recognition
• 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 2207/10072 Tomographic images
• CPC Class Codes: G06T 2207/30048 Heart; Cardiac
• CPC Class Codes: G06T 2211/412 Dynamic
• CPC Class Codes: G06T 7/251 involving models
• CPC Class Codes: G06V 2201/031 of internal organs

Abstract

Systems and methods for deriving a cardiac cycle signal by selecting images of a portion of a cardiovascular system include receiving a plurality of images from a scanner that have been recorded over a period of time. The images represent one or more locations along the extent of the cardiovascular system. The images are then selected based on common criteria determined from the plurality of images and without reference to an external signal. The common criteria comprises changes in the size of a cross section of the aorta, changes in the volume of the heart, changes in the area of a cross section of the heart. In addition, the criteria can include the mean pixel difference between adjacent images.

Claims

1. A method for ordering a plurality of images of a portion of a cardiovascular system comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein deriving the cardiac signal comprises;

segmenting a set of data representing a blood vessel in each image;

computing a change value for the blood vessel; and

determining the cardiac cycle signal based on a sequence of the change values for each image.

2. The method of claim 1, wherein the change value is a change in the area of a cross section of the blood vessel.

3. The method of claim 1, wherein the change value is a change in the position of a wall of the blood vessel.

4. A method for ordering a plurality of images of a portion of a cardiovascular system comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein deriving the cardiac cycle signal comprises;

segmenting a set of data representing a cross-section of the aorta in each image;

computing an area value representing an area of the cross-section; and

determining the cardiac cycle signal based on a sequence of the area values for each image.

5. The method of claim 4, further comprising estimating the position of the aorta within the image data prior to segmenting the set of data.

6. The method of claim 5, wherein estimating the position of the aorta utilizes a Hough transform.

7. The method of claim 4, wherein segmenting of the aorta cross-section utilizes Dynamic Programming.

8. The method of claim 4, further comprising filtering the cardiac cycle signal to produce a smoothed cardiac cycle signal.

9. A method for ordering a plurality of images of a portion of a cardiovascular system comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein deriving the cardiac cycle signal comprises;

for each image in the plurality of images performing the tasks of;

selecting an adjacent subsequent image;

calculating a mean pixel difference between the image and the subsequent image; and

determining the cardiac cycle signal based on the mean pixel differences of the images.

10. A method for ordering a plurality of images of a portion of a cardiovascular system comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein deriving the cardiac cycle signal comprises;

segmenting a set of data representing a cross-section of a heart in each image;

computing an area value representing an area of the cross-section; and

determining the cardiac cycle signal based on a sequence of the area values for each image.

11. A method for ordering a plurality of images of a portion of a cardiovascular system comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein deriving the cardiac cycle signal comprises;

for each image in the plurality of images performing the tasks of;

determining a first border of a heart in the image;

determining a second border of the heart in a subsequent adjacent image;

determining the difference between the first border and the second border; and

determining the cardiac cycle based on a sequence of the differences.

12. A method for ordering a plurality of images of a portion of a cardiovascular system comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image to produce an ordered set of images, wherein the ordered set of images is further filtered to produce a subset of images, said subset of images comprising images acquired at a desired point in the cardiac cycle signal.

13. A method for ordering a plurality of images of a portion of a cardiovascular system comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein the derived cardiac cycle signal is used to interpolate or reconstruct new images at specific phases in the cardiac cycle from the original scanned images or other related data.

14. A computer-readable medium having computer executable instructions for performing a method for ordering a plurality of images of a portion of a cardiovascular system, the method comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein deriving the cardiac signal comprises;

segmenting a set of data representing a blood vessel in each image;

computing a change value for the blood vessel; and

determining the cardiac cycle signal based on a sequence of the change values for each image.

15. The computer-readable medium of claim 14, wherein the change value is a change in the area of a cross section of the blood vessel.

16. The computer-readable medium of claim 14, wherein the change value is a change in the position of a wall of the blood vessel.

17. A computer-readable medium having computer executable instructions for performing a method for ordering a plurality of images of a portion of a cardiovascular system, the method comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein deriving the cardiac cycle signal comprises;

segmenting a set of data representing a cross-section of the aorta in each image;

computing an area value representing an area of the cross-section; and

determining the cardiac cycle signal based on a sequence of the area values for each image.

18. The computer-readable medium of claim 17, further comprising estimating the position of the aorta within the image data prior to segmenting the set of data.

19. The computer-readable medium of claim 18, wherein estimating the position of the aorta utilizes a Hough transform.

20. The computer-readable medium of claim 17, wherein segmenting of the aorta cross-section utilizes Dynamic Programming.

21. The computer-readable medium of claim 17, further comprising filtering the cardiac cycle signal to produce a smoothed cardiac cycle signal.

22. A computer-readable medium having computer executable instructions for performing a method for ordering a plurality of images of a portion of a cardiovascular system, the method comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein deriving the cardiac cycle signal comprises;

for each image in the plurality of images performing the tasks of;

selecting an adjacent subsequent image;

calculating a mean pixel difference between the image and the subsequent image; and

determining the cardiac cycle signal based on the mean pixel differences of the images.

23. A computer-readable medium having computer executable instructions for performing a method for ordering a plurality of images of a portion of a cardiovascular system, the method comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein deriving the cardiac cycle signal comprises;

segmenting a set of data representing a cross-section of a heart in each image;

computing an area value representing an area of the cross-section; and

determining the cardiac cycle signal based on a sequence of the area values for each image.

24. A computer-readable medium having computer executable instructions for performing a method for ordering a plurality of images of a portion of a cardiovascular system, the method comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein deriving the cardiac cycle signal comprises;

for each image in the plurality of images performing the tasks of;

determining a first border of a heart in the image;

determining a second border of the heart in a subsequent adjacent image;

determining the difference between the first border and the second border; and

determining the cardiac cycle based on a sequence of the differences.

25. A computer-readable medium having computer executable instructions for performing a method for ordering a plurality of images of a portion of a cardiovascular system, the method comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image to produce an ordered set of images, wherein the ordered set of images is further filtered to produce a subset of images, said subset of images comprising images acquired at a desired point in the cardiac cycle signal.

26. A computer-readable medium having computer executable instructions for performing a method for ordering a plurality of images of a portion of a cardiovascular system, the method comprising:

receiving from an image scanner a plurality of images recorded over a period of time, the images representing one or more locations along the extent of the cardiovascular system;

deriving a cardiac cycle signal from the plurality of scanned images; and

assigning a phase in the cardiac cycle to each scanned image,

wherein the derived cardiac cycle signal is used to interpolate or reconstruct new images at specific phases in the cardiac cycle from the original scanned images or other related data.