Methods for suppression of items and areas of interest during visualization

• US 7,868,900 B2
• Filed: 05/12/2004
• Issued: 01/11/2011
• Est. Priority Date: 05/12/2004
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Sirohey, Saad Ahmed, Avinash, Gopal B.
• Primary Examiner(s): Wu; Xiao M
• Assistant Examiner(s): Ma; Tize
• Application Number:
  US10/844,073
• Publication Number:
  US 20050256399A1
• Time in Patent Office: 2,435 Days
• Field of Search: 345/592, 382/275, 382128-132, 382/172, 382256-257, 382/260, 382/270
• US Class Current: 345/592
• CPC Class Codes: A61B 6/00 Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment instruments measuring radiation intensity for application in the field of nuclear medicine, e.g. in vivo counting, G01T1/161; apparatus for taking X-ray photographs G03B42/02
• CPC Class Codes: A61B 6/03 Computed tomography [CT] echo-tomography A61B8/14
• CPC Class Codes: A61B 6/4035 the source being combined with a filter or grating
• CPC Class Codes: G06T 15/503 Blending, e.g. for anti-aliasing
• CPC Class Codes: G06T 2200/04 involving 3D image data
• CPC Class Codes: G06T 2207/10081 Computed x-ray tomography [CT]
• CPC Class Codes: G06T 2207/20104 Interactive definition of region of interest [ROI]
• CPC Class Codes: G06T 2207/30028 Colon; Small intestine
• CPC Class Codes: G06T 2210/41 Medical
• CPC Class Codes: G06T 2210/62 Semi-transparency
• CPC Class Codes: G06T 7/0012 Biomedical image inspection

Abstract

A method for generating an image includes accessing data of a scan of an object, using at least one characteristic of the accessed data to delineate at least one item of interest in the data and generating a 3D visualization image wherein transparency levels for at least some pixels not representing the item of interest are set according to a first set of rules, and transparency levels for at least some pixels representing an interior portion of the item of interest are set according to a second set of rules different than the first set of rules, and at least some pixels representative of a transition area are set according to a third set of rules different than the first and second sets of rules.

Claims

1. A method for generating an image using an imaging system, said method comprising:

accessing data of a scan of an object;

delineating, via a processor, at least one item of interest in the accessed data using at least one physical characteristic, the at least one physical characteristic comprising at least one of a shape, a size, a density, a location, and a curvature of the at least one item of interest;

setting a transparency value for a first set of pixels that do not represent the at least one item of interest according to a first set of rules;

setting a transparency value for a second set of pixels that represent an interior portion of the at least one item of interest according to a second set of rules, the second set of rules being different than the first set of rules;

setting a transparency value for a third set of pixels that represent a transition area between the first set of pixels and the second set of pixels according to a third set of rules, the third set of rules being different from the first set of rules and the second set of rules;

generating an image of the object using the accessed scan data and the first, second, and third sets of rules, the image comprising a three-dimensional (3D) visualization image having transparency levels for the first set of pixels set according to the first set of rules, transparency levels for the second set of pixels set according to the second set of rules, and transparency levels for the third set of pixels set according to the third set of rules; and

adjusting a transparency value for pixels representing the delineated at least one item of interest, wherein said adjusting the transparency value does not affect the transparency value for pixels in any other pixels of the image.

2. A method in accordance with claim 1 wherein generating the image comprises generating a 3D visualization image wherein transparency levels for the first set of pixels are set according to the first set of rules, transparency levels for the second set of pixels are set according to the second set of rules such that a pixel in the second set of pixels has a higher transparency level with the second set of rules than with the first set of rules.

3. A method in accordance with claim 1 wherein generating the image comprises generating a 3D visualization image wherein transparency levels for the first set of pixels are set according to the first set of rules, transparency levels for the second set of pixels are set according to the second set of rules such that a pixel in the second set of pixels has a higher transparency level with the second set of rules than with the first set of rules, and transparency levels for the third set of pixels is set according to the third set of rules such that a pixel in the transition area has a transparency level less with the third set of rules than with the first and second sets of rules.

4. A method in accordance with claim 1 wherein generating the image comprises generating a 3D visualization image wherein transparency levels for the first set of pixels are set according to the first set of rules, transparency levels for the second set of pixels are set according to the second set of rules such that a pixel in the second set of pixels has a higher transparency level with the second set of rules than with the first set of rules, and transparency levels for the third set of pixels are set according to the third set of rules such that at least one pixel in the third set of pixels has a transparency level less with the third set of rules than with the second set of rules and greater with the third set of rules than with the first set of rules.

5. A method in accordance with claim 1 wherein delineating at least one item of interest in the data comprises delineating the at least one item of interest wherein a user has selected the at least one item of interest.

6. A method in accordance with claim 1 wherein delineating the at least one item of interest in the data comprises delineating the at least one item of interest comprising fecal matter.

7. A method in accordance with claim 1 wherein at least one of the first, second, and third set of rules is received from a user.

8. A method in accordance with claim 1 further comprising:

receiving an transparency level from a user; and

generating a second 3D visualization image wherein transparency levels for at least some pixels representing the interior portion of the item of interest are set according to the received transparency level.

9. A method in accordance with claim 1 further comprising:

receiving an transparency level from a user; and

generating a second 3D visualization image wherein transparency levels for at least some pixels representing the transition area are set according to the received transparency level.

10. A method in accordance with claim 1 further comprising:

receiving a first transparency level from a user;

receiving a second transparency level from a user;

generating a second 3D visualization image wherein transparency levels for at least some pixels representing the interior portion of the item of interest are set according to the received first transparency level and at least some pixels representing the transition area are set according to the received second transparency level.

11. A method in accordance with claim 1, wherein the imaging system comprises a computed tomography scanner, accessing data of a scan of an object comprises accessing X-ray data acquired by the computed tomography scanner during the scan of the object.

12. A method for generating an image using an imaging system, said method comprising:

accessing data of a scan of an object;

delineating, via a processor items of interest from the accessed data, the delineated items of interest including at least one similar physical characteristic represented by the accessed data, the at least one similar physical characteristic comprising at least one of a shape, a size, a density, a location, and a curvature of the items of interest;

defining a set of rules for setting an intensity for at least one item of interest of the delineated items of interest; and

generating an image using the accessed data and the delineated items of interest such that the intensity of the at least one item of interest is displayed in the image according to the defined set of rules, wherein adjusting the set of rules applied to the at least one item of interest does not affect the intensity of any other delineated items of interest, and the image comprising a two-dimensional (2D) reformatted view.

13. A method in accordance with claim 12 further comprising generating a 2D reformatted view using the accessed data and the delineated items of interest such that the at least one item of interest is at least partially removed from the 2D reformatted view.

14. A method in accordance with claim 12 wherein generating the image further comprises changing transparency values for pixels within the at least one item of interest.

15. A method in accordance with claim 14 further comprising receiving from a user a selection of the at least one item of interest comprising bone.

16. A method for generating an image using an imaging system, said method comprising:

accessing data of a scan of an object;

detecting and delineating items of interest from the data via a processor, the items of interest including at least one similar physical characteristic represented by the accessed data, the at least one similar physical characteristic comprising at least one of a shape, a size, a density, a location, and a curvature of the items of interest;

defining a set of rules for setting a transparency value for at least one item of interest of the delineated items of interest; and

generating an image using the accessed data, the second image comprising a three-dimensional (3D) visualization image having at least the transparency value for the at least one item of interest varied based upon the delineated items of interest and the defined set of rules, wherein adjusting the set of rules for setting the transparency value for the at least one item of interest does not affect the transparency of any other delineated items of interest.

17. A method in accordance with claim 16 wherein

detecting and delineating items of interest from said data further comprises detecting and delineating items of interest from said data such that at least two items of interest of the delineated items of interest include substantially equal intensity values;

defining a set of rules further comprises defining a set of rules for setting a transparency value for a first item of interest of the at least two items of interest; and

generating an image further comprises generating a 3D visualization image wherein at least the transparency value for the first item of interest is varied and a transparency value of a second item of interest of the at least two items of interest is held constant based upon the delineated items of interest and the defined set of rules.

18. A method for generating an image using an imaging system, said method comprising:

accessing data of a scan of an object;

generating a first three-dimensional (3D) visualization image of the object using the accessed data;

displaying the generated first 3D visualization image on a display;

receiving, via a user interface, an indication of an area of interest, the area of interest selected from the first 3D visualization image as displayed, the area of interest selected based on at least one of a shape, a size, a density, a location, and a curvature of the area of interest as visualized;

defining a set of rules for setting a transparency value for the area of interest;

mapping the area of interest from the first 3D visualization image to the data to obtain a mapped volume of interest;

performing a segmentation process on the mapped volume of interest, via a processor, to delineate at least one item of interest;

varying transparency values of the first 3D visualization image based upon the segmentation and the defined set of rules, wherein varying the transparency value of the delineated item of interest does not vary the transparency value of any other areas in the 3D visualization image; and

generating a second 3D visualization image using the accessed data, the second 3D visualization image having the varied transparency levels.

19. A method in accordance with claim 18 wherein varying transparency values based upon the segmentation comprises varying transparency values based upon the segmentation such that the interior of the area of interest is substantially transparent.

20. A method in accordance with claim 18 wherein varying transparency values based upon the segmentation comprises varying transparency values based upon the segmentation such that the interior of the area of interest is substantially transparent and a transition area is delineated to enable a viewer of the 3D visualization image to identify the area of interest.

21. A non-transitory computer readable medium encoded with a program configured to instruct a computer to:

access scan data;

delineate the accessed scan data into at least three classes of voxels, voxels within each class of voxels including a similar physical characteristic represented by the accessed scan data, the similar physical characteristic comprising at least one of a shape, a size, a density, a location, and a curvature of each class of voxels;

define a first set of rules for setting a transparency value for a first class of voxels;

define a second set of rules for setting a transparency value for a second class of voxels;

define a third set of rules for setting a transparency value for a third class of voxels;

apply a transparency level to each class of voxels based on the sets of rules;

render the data to form an image using the accessed scan data, the image comprising a three-dimensional (3D) image; and

vary the transparency value for the first class of voxels, wherein said varying the transparency value does not affect the transparency of any other voxels in the image.

22. A non-transitory computer readable medium encoded with a program configured to instruct a computer to:

access scan data;

delineate the accessed scan data into regions using a processor;

group the delineated regions into at least three classes of regions, via the processor, each class of regions includes a similar physical characteristic represented by the accessed scan data, the at least one similar physical characteristic comprising at least one of a shape, a size, a density, a location, and a curvature of each class of regions;

define a set of rules for setting an intensity for at least one class of regions;

change the intensity in at least one delineated region according to the defined set of rules, wherein changing the intensity in at the least one delineated region does not change the intensity in any other area of the scan data; and

generate an image using the accessed scan data and the changed intensity.

23. A medium in accordance with claim 22, wherein said program is further configured to instruct the computer to render the data to generate a three-dimensional (3D) image as the image.

24. A medium in accordance with claim 22, wherein said program is further configured to instruct the computer to reformat the data to generate a two-dimensional (2D) image as the image.

25. A non-transitory computer readable medium encoded with a program configured to instruct a computer to:

access scan data;

perform a computer aided detection, via a processor, on the first image to identify at least one item of interest using a physical characteristic represented by the scan data, the physical characteristic comprising at least one of a shape, a size, a density, a location, and a curvature of the at least one item of interest;

define a set of rules for setting a transparency level for at least one item of interest;

vary transparency levels of the scan data based on the at least one item of interest and the defined set of rules, wherein varying the level of the scan data for the at least one item of interest does not affect the scan data in any other area of the scan; and

render the scan data to form an image using the accessed scan data, the image comprising a three-dimensional (3D) image.

26. A non-transitory computer readable medium encoded with a program configured to instruct a computer to:

access scan data;

render the accessed scan data to form a first image that is a three-dimensional (3D) image;

receive from a user via a user interface an indication of at least one region of interest within the first image as displayed to the user, the at least one region of interest indicated based on at least one of a shape, a size, a density, a location, and a curvature of the at least one region of interest as rendered;

map the at least one region of interest onto the accessed scan data to generate a volume of interest;

segment the volume of interest to generate a segmentation mask for the first image, the segmentation mask including a first set of pixels corresponding to the at least one region of interest and a second set of pixels corresponding a remainder of the volume of interest that is not the at least one region of interest;

define a set of rules that define a transparency level for at least the first set of pixels;

vary transparency levels of the first image based on the segmentation mask and the set of rules, wherein varying the transparency level for the at least first set of pixels does not vary the transparency level of any other pixels of the first image; and

render the accessed scan data to generate a second image having the varied transparency levels.