ENHANCED IMAGING FOR OPTICAL COHERENCE TOMOGRAPHY

• US 20110103658A1
• Filed: 10/21/2010
• Published: 05/05/2011
• Est. Priority Date: 10/29/2009
• Status: Active Grant

• Current Assignee: Optovue Incorporated
• Original Assignee: Optovue Incorporated
• Inventors: Jang, Ben, Davis, John
• Granted Patent: US 8,781,214 B2
• Time in Patent Office: Days
• US Class Current: 382/128
• CPC Class Codes: G01N 21/4795 spatially resolved investigating of object in scattering medium in vivo A61B

Abstract

An imaging device to obtain images, comprising: an optical source; an x-y scanner receiving light from the optical source and directing it onto a sample; a detector receiving reflected light from the scanner; and a computer receiving a signal from the detector and providing a 3D data set containing voxels with a given voxel resolution of a sample, the computer further executing instructions for finding values other than a single axes sum to represent a set of voxels; composing a 2D image using the values.

Claims

1. An imaging device, comprising:

an optical source;

an x-y scanner receiving light from the optical source and directing it onto a sample;

a detector receiving reflected light from the scanner; and

a computer receiving a signal from the detector and providing a 3D data set containing voxels with a given voxel resolution of a sample, the computer further executing instructions for finding values other than a single axis sum to represent a set of voxels;

composing a 2D image using the values.

2. The device of claim 1, wherein finding values includes determining the median values of voxels along one of the three dimensions in the 3D data set.

3. The device of claim 2, wherein composing a 2D image using the values includes utilizing the median values as individual pixel values in the 2D image.

4. The device of claim 1, wherein finding values includes determining a median value within a 3D neighborhood of each voxel of interest of the 3D data set.

5. The device of claim 4, wherein composing a 2D image using the values includes summing the median values along one direction to determine a pixel value of the 2D image.

6. The device of claim 1, wherein finding values includes

defining a first column and a second column of voxels within the 3D data set, adjacent to each other and extending along a selected direction of the 3D data set;

defining a step size along the selected direction in the 3D data set;

summing the voxels in the first and the second column along the selected direction in the 3D data set, alternating between values of the first and the second column for each step size along the selected direction of the 3D data set, to obtain the value.

7. The device in claim 6, wherein composing the 2D image includes defining the value as a pixel of the 2D image for the first column.

8. The device of claim 1, wherein finding values includes

finding a first 2D surface embedded in the 3D data set according to physical features;

displacing the first 2D surface along a third dimension within the 3D data set by a selected distance to create a second 2D surface;

setting alpha channel values within said two surfaces to create a mask; and

creating a selected 3D data set by integrating voxels in the 3D data set and said mask.

9. The device of claim 8, wherein composing a 2D image includes creating a third 2D surface image from the selected 3D data set.

10. The device of claim 1, wherein the values are obtained within a region of interest in the 3D data set.

11. The device of claim 1, further comprising a gray scale or color lookup table to provide brightness and contrast adjustment to the 2D image.

12. The device of claim 1, wherein the 2D image includes a representation of a simulated scanning laser ophthalmoscope image.

13. The device of claim 12, wherein the 2D image further includes a selected portion of a retina pigment epithelium region or an inner limiting membrane.

14. The device of claim 1, wherein the voxel resolutions in X, Y, and Z directions include a range from 5 μ

m to 40 μ

m, 40 μ

m to 80 μ

m, and 1 μ

m to 5 μ

m, respectively.

15. The device of claim 1, wherein finding values includes correcting for motion error using alignment offset vectors.

16. A method for enhancing ophthalmology images comprising:

obtaining a 3D image data set containing voxels with a given voxel resolution of a sample;

finding values other than a single axes sum to represent a set of voxels;

composing a 2D image using the values; and

displaying the 2D image.

17. The method of claim 16, wherein finding values includes determining the median values of voxels along one of the three dimensions in the 3D data set.

18. The method of claim 17, wherein composing a 2D image using the values includes utilizing the median values as individual pixel values in the 2D image.

19. The method of claim 16, wherein finding values includes determining a median value within a 3D neighborhood of each voxel of interest of the 3D data set.

20. The method of claim 19, wherein composing a 2D image using the values includes summing the median values along one direction to determine a pixel value of the 2D image.

21. The method of claim 16, wherein finding values includes

defining a first column and a second column of voxels within the 3D data set, adjacent to each other and extending along a selected direction of the 3D data set;

defining a step size along the selected direction in the 3D data set;

summing the voxels in the first and the second column along the selected direction in the 3D data set, alternating between values of the first and the second column for each step size along the selected direction of the 3D data set, to obtain the value.

22. The method of claim 21, wherein composing the 2D image includes defining the value as a pixel of the 2D image for the first column.

23. The method of claim 16, wherein finding values includes

finding a first 2D surface embedded in the 3D data set according to physical features;

displacing the first 2D surface along a third dimension within the 3D data set by a selected distance to create second 2D surface;

setting alpha channel values within said two surfaces to create a mask; and

creating a selected 3D data set by integrating voxels in the 3D data set and said mask.

24. The method of claim 23, wherein composing a 2D image includes creating a third 2D surface image from the selected 3D data set.

25. The method of claim 16, wherein the values are obtained within a region of interest in the 3D data set.

26. The method of claim 16, further comprising a gray scale or color lookup table to provide brightness and contrast adjustment to the 2D image.

27. The method of claim 16, wherein the 2D image includes a representation of a simulated scanning laser ophthalmoscope image.

28. The method of claim 27, wherein the 2D image further includes a selected portion of a retina pigment epithelium region or an inner limiting membrane.

29. The method as recited in claim 16, wherein the voxel resolutions in X, Y, and Z directions include a range from 5 μ

m to 40 μ

m, 40 μ

m to 80 μ

m, and 1 μ

m to 5 μ

m, respectively.

30. The method as recited in claim 16, wherein finding values includes correcting for motion error using alignment offset vectors.