Deformable transformations for interventional guidance

• US 20030011624A1
• Filed: 07/13/2001
• Published: 01/16/2003
• Est. Priority Date: 07/13/2001
• Status: Abandoned Application

• Current Assignee: iGO Technologies Inc.
• Original Assignee: iGO Technologies Inc.
• Inventors: Ellis, Randy
• Application Number:
  US09/903,644
• Publication Number:
  US 20030011624A1
• Time in Patent Office: Days
• US Class Current: 345/646
• CPC Class Codes: A61B 2034/105 Modelling of the patient, e.g. for ligaments or bones
• CPC Class Codes: A61B 2034/2068 using pointers, e.g. pointers having reference marks for determining coordinates of body points
• CPC Class Codes: A61B 2034/2072 Reference field transducer attached to an instrument or patient
• CPC Class Codes: A61B 2034/256 having a database of accessory information, e.g. including context sensitive help or scientific articles
• CPC Class Codes: A61B 2090/364 Correlation of different images or relation of image positions in respect to the body
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 34/25 User interfaces for surgical systems
• CPC Class Codes: A61B 90/10 for stereotaxic surgery, e.g. frame-based stereotaxis
• CPC Class Codes: A61B 90/36 Image-producing devices or illumination devices not otherwise provided for
• CPC Class Codes: G16H 10/60 for patient-specific data, e.g. for electronic patient records
• CPC Class Codes: G16H 30/40 for processing medical images, e.g. editing
• CPC Class Codes: G16H 50/50 for simulation or modelling of medical disorders
• CPC Class Codes: G16H 70/00 ICT specially adapted for the handling or processing of medical references

Abstract

The method includes the steps of obtaining atlas data in an atlas coordinate frame from a computer-readable atlas of anatomical information, obtaining patient data in a patient coordinate frame that corresponds to obtained atlas data in an atlas coordinate frame, and morphing atlas data using a first morphing transformation between obtained patient data in a patient coordinate frame and corresponding obtained atlas data in an atlas coordinate frame. The apparatus includes a tracking system for tracking physical objects; a computer for receiving information on tracked objects, a computer program on computer readable medium for operation on the computer. The computer program includes instructions for obtaining atlas data in an atlas coordinate frame from a computer-readable atlas of anatomical information, obtaining patient data in a patient coordinate frame that corresponds to obtained atlas data in an atlas coordinate frame, and morphing atlas data using a first morphing transformation between obtained patient data in a patient coordinate frame and corresponding obtained atlas data in an atlas coordinate frame. One may build upon the summarized aspects to provide other useful methods and apparatuses for interventional guidance.

Claims

1. A method of obtaining interventional guidance for a patient, the method comprising the steps of:

a) Obtaining atlas data in an atlas coordinate frame from a computer-readable atlas of anatomical information;

b) Obtaining patient data in a patient coordinate frame that corresponds to obtained atlas data in an atlas coordinate frame, and

c) Morphing atlas data using a first morphing transformation between obtained patient data in a patient coordinate frame and corresponding obtained atlas data in an atlas coordinate frame.

2. The method of claim 1, further comprising the step of presenting morphed atlas data to an interventionalist.

3. The method of claim 1, wherein the step of obtaining patient data in a patient coordinate frame that correspond to atlas data in an atlas coordinate frame comprises the step of:

a) Collecting a plurality of points in a patient coordinate frame from the patient that correspond to points in an atlas coordinate frame from the atlas.

4. The method of claim 1, wherein the obtained patient data comprises a plurality of points from the patient anatomy in a patient coordinate frame, and the obtained atlas data comprises a plurality of points from the atlas in an atlas coordinate frame.

5. The method of claim 4, wherein the step of obtaining a plurality of points in a patient coordinate frame that correspond to points in an atlas coordinate frame from the atlas comprises the steps of:

a) Obtaining an image of the patient including a plurality of points in an image coordinate frame that correspond to points in an atlas coordinate frame from the atlas,

b) Collecting a plurality of points in a patient coordinate frame from the patient that correspond to points in an atlas coordinate frame from the atlas, and

c) Collecting a plurality of points in a patient coordinate frame from the patient that correspond to points in an image coordinate frame from the image,

6. The method of claim 5, further comprising the steps of:

a) Morphing the atlas to the image using a second morphing transformation between points in an image coordinate frame and corresponding points in an atlas coordinate frame, and

b) Registering the image to the patient using a registration transformation between a plurality of points in a patient coordinate frame and corresponding points in an image coordinate frame,

and wherein the step of morphing the atlas to the patient using a morphing transformation between points in a patient coordinate frame and corresponding points in an atlas coordinate frame comprises the step of;

c) Morphing the atlas to the patient using a third morphing transformation comprising the second morphing transformation and the registration transformation.

7. The method of claim 5, the method further comprising the steps of:

a) Morphing the atlas to the image using a second morphing transformation between an image coordinate frame and a corresponding atlas coordinate frame, and

b) Registering the image to the patient using a registration transformation between a plurality of patient coordinates and corresponding image coordinates.

8. The method of claim 5, further comprises the steps of:

a) Morphing the atlas to the image using a second morphing transformation between points in an image coordinate frame and corresponding points in an atlas coordinate frame, and

b) Morphing the atlas to the patient using a third morphing transformation between points in a patient coordinate frame and corresponding points in an atlas coordinate frame,

and wherein the step of morphing the atlas to the patient using a morphing transformation between points in a patient coordinate frame and corresponding points in an atlas coordinate frame comprises the step of;

c) Morphing the image to the patient using a fourth morphing transformation comprising the second morphing transformation and the third morphing transformation.

9. The method of claim 1, further comprising the steps of:

a) Obtaining a relative pose of an actual instrument relative to the patient,

b) Tracking the relative pose of the actual instrument; and

c) Updating the relative pose of a virtual instrument to be the same as the relative pose of the actual instrument.

10. The method of claim 9, further comprising the step of presenting the updated virtual instrument with the morphed atlas data to an interventionalist.

11. The method of claim 1, wherein the step of obtaining patient data in a patient coordinate frame that correspond to atlas data in an atlas coordinate frame comprises the step of:

a) Collecting patient data in a patient coordinate frame from the patient that corresponds to atlas data in an atlas coordinate frame from the atlas.

12. The method of claim 1, further comprising the steps of:

a) Obtaining an image of the patient including image data in an image coordinate frame that correspond to atlas data in an atlas coordinate frame from the atlas.

13. The method of claim 12, wherein the image is a preoperative image.

14. The method of claim 12, wherein the image is an intraoperative image.

15. The method of claim 12, further comprising the steps of:

a) Morphing atlas data using a second morphing transformation between obtained image data in an image coordinate frame and corresponding obtained atlas data in an atlas coordinate frame, and

b) Registering image data to patient data using a registration transformation between obtained patient data in a patient coordinate frame and corresponding obtained image data,

and wherein the step of morphing the atlas data using a morphing transformation between patient data in a patient coordinate frame and corresponding atlas data in an atlas coordinate frame comprises the step of;

c) Morphing atlas data using a third morphing transformation comprising the second morphing transformation and the registration transformation.

16. The method of claim 12, further comprising the steps of:

a) Morphing atlas data using a second morphing transformation between image data in an image coordinate frame and corresponding atlas data in an atlas coordinate frame, and

b) Registering image data and morphed atlas data from the second morphing transformation using a registration transformation between obtained patient data and corresponding obtained image data.

17. The method of claim 12, further comprising the steps of:

a) Morphing atlas data using a second morphing transformation between image data in an image coordinate frame and corresponding atlas data in an atlas coordinate frame, and

b) Morphing image data to the patient using a third morphing transformation comprising the first morphing transformation and the second morphing transformation.

18. The method of claim 12, further comprising the steps of:

a) Registering image data using a registration transformation between obtained patient data and corresponding obtained image data, and

b) Morphing atlas data using a second morphing transformation comprising the first morphing transformation and the registration transformation.

19. The method of claim 12, further comprising the step of:

a) Registering image data using a registration transformation between obtained patient data and corresponding obtained image data.

20. The method of claim 12, further comprising the step of:

a) Morphing atlas data using a second morphing transformation between image data in an image coordinate frame and corresponding atlas data in an atlas coordinate frame.

21. The method of claim 12, further comprising the steps of:

a) Obtaining a relative pose of an image from an image coordinate frame to a patient coordinate frame, and

b) Morphing atlas data using a morphing transformation between obtained atlas data and corresponding obtained image data,

and wherein the step of morphing the atlas data using a morphing transformation between patient data in a patient coordinate frame and corresponding atlas data in an atlas coordinate frame comprises the steps of;

c) Morphing atlas data using a morphing transformation comprising the first morphing transformation and the relative pose.

22. The method of claim 12, further comprising the steps of:

a) Obtaining a relative pose of an image from an image coordinate frame to a patient coordinate frame,

b) Morphing atlas data using a morphing transformation between obtained atlas data and corresponding obtained image data.

23. The method of claim 12, further comprising the steps of:

a) Morphing atlas data using a second morphing transformation between obtained atlas data and corresponding obtained image data, and

b) Morphing atlas data using a third morphing transformation comprising the first morphing transformation and the second morphing transformation.

24. The method of claim 12, further comprising the steps of:

a) Obtaining a relative pose of an image from an image coordinate frame to a patient coordinate frame, and

b) Morphing atlas data using a second morphing transformation comprising the first morphing transformation and the relative pose of the image coordinate frame to the patient coordinate frame.

25. The method of claim 12, further comprising the steps of:

a) Obtaining a relative pose of an image from an image coordinate frame to a patient coordinate frame.

26. The method of claim 12, further comprising the steps of:

a) Morphing atlas data using a morphing transformation between obtained atlas data and corresponding obtained image data.

27. The method of claim 1, further comprising the steps of:

a) Obtaining a preoperative image of the patient including image data in an image coordinate frame that correspond to atlas data in an atlas coordinate frame from the atlas,

b) Obtaining an intraoperative image of the patient including image data in an image coordinate frame that correspond to atlas data in an atlas coordinate frame from the atlas,

c) Obtaining a relative pose of an intraoperative image from an intraoperative image coordinate frame to a patient coordinate frame,

d) Registering preoperative image data using a registration transformation between obtained patient data and corresponding obtained preoperative image data,

e) Morphing atlas data using a second morphing transformation between obtained atlas data and corresponding obtained preoperative image data,

f) Morphing atlas data using a fourth morphing transformation comprising the registration transformation, the relative pose, and the second morphing transformation,

g) Morphing morphed atlas data morphed by the fourth morphing transformation and intraoperative image data using a fifth morphing transformation comprising the registration transformation and the relative pose,

and wherein the step of morphing the atlas data using a first morphing transformation between patient data in a patient coordinate frame and corresponding atlas data in an atlas coordinate frame comprises the step of;

h) Morphing atlas data using a third morphing transformation comprising the registration transformation and the second morphing transformation.

29. The apparatus of claim 28, further comprising means for presenting the morphed atlas data to an interventionalist.

30. The apparatus of claim 28, further comprising:

a) Means for obtaining a relative pose of an actual instrument relative to the patient,

b) Means for tracking the relative pose of the actual instrument; and

c) Means for updating the relative pose of a virtual instrument to be the same as the relative pose of the actual instrument.

31. The apparatus of claim 30, further comprising means for presenting the updated virtual instrument with the morphed atlas data to an interventionalist.

28. An apparatus for obtaining interventional guidance for a patient, the apparatus comprising:

a) Means for obtaining atlas data in an atlas coordinate frame from a computer-readable atlas of anatomical information;

b) Means for obtaining patient data in a patient coordinate frame that corresponds to obtained atlas data in an atlas coordinate frame, and

c) Means for morphing atlas data using a first morphing transformation between obtained patient data in a patient coordinate frame and corresponding obtained atlas data in an atlas coordinate frame.

32. An apparatus for obtaining interventional guidance for a patient, the apparatus comprising:

a) A tracking system for tracking actual objects;

b) A computer for receiving information on tracked objects,

c) A computer program on computer readable medium for operation on the computer, the computer program comprising instructions for;

Obtaining atlas data in an atlas coordinate frame from a computer-readable atlas of anatomical information;

Obtaining patient data in a patient coordinate frame that corresponds to obtained atlas data in an atlas coordinate frame, and

Morphing atlas data using a first morphing transformation between obtained patient data in a patient coordinate frame and corresponding obtained atlas data in an atlas coordinate frame.

33. A computer program for use in obtaining interventional guidance for a patient, the computer program for use in association with a tracking system for tracking actual objects and a computer for receiving information on tracked objects, the computer program on computer readable medium for operation on the computer, the computer program comprising instructions for:

Obtaining atlas data in an atlas coordinate frame from a computer-readable atlas of anatomical information;

Obtaining patient data in a patient coordinate frame that corresponds to obtained atlas data in an atlas coordinate frame, and

Morphing atlas data using a first morphing transformation between obtained patient data in a patient coordinate frame and corresponding obtained atlas data in an atlas coordinate frame.