Scan conversion of medical imaging data from polar format to cartesian format

• US 7,620,220 B2
• Filed: 03/21/2003
• Issued: 11/17/2009
• Est. Priority Date: 03/21/2003
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Lam, Duc Huu
• Primary Examiner(s): Ahmed; Samir A.
• Assistant Examiner(s): Fitzpatrick; Atiba O
• Application Number:
  US10/394,480
• Publication Number:
  US 20040186369A1
• Time in Patent Office: 2,433 Days
• Field of Search: 382/100, 382/128, 382/131, 382/132, 382/133, 382/134, 382/276, 382/277, 382/285, 382/286, 382/293, 382/298, 382/325, 382/154, 345/419, 345/420, 345/427, 345/581, 345/582, 345/583, 345/585, 345/586, 345/619, 345/646, 345/647, 345/660, 345/661, 345/664, 345/665, 348/61, 348/65, 348/77, 348/441, 348/442
• US Class Current: 382/128
• CPC Class Codes: G06T 3/12 Panospheric to cylindrical image transformations

Abstract

The improved system and method converts medical imaging data in R-θ or polar format to a Cartesian format that is readily recognizable to the human eye. The system and method texturize or wrap the R-θ imaging data around an object, which is preferably a cone. The height of the cone is zero, or reduced to zero, to create the Cartesian format. To texturize or wrap the R-θ imaging data around the cone, the preferred embodiment uses a commercially available graphics processing unit and software.

Claims

1. A method for converting imaging data in polar format from a medical imaging device to Cartesian format, the method comprising:

providing a medical imaging device configured and arranged for insertion of a probe of the medical imaging device into a patient;

generating imaging data in polar format by the medical imaging device, wherein the generated polar imaging data comprises a single distance R_i and a single angle θ

, for each of at least one physical object from a centerpoint of the imaging data; and

converting the generated polar imaging data into Cartesian format, wherein the conversion of the polar imaging data into Cartesian format, being performed on a computer, comprises

wrapping the polar imaging data around a cone; and

reducing the height of the cone to zero.

2. The method of claim 1 further comprising performing the wrapping step before performing the reducing step.

3. The method of claim 1 wherein the medical imaging device uses acoustic energy to obtain the imaging data.

4. The method of claim 3 wherein the medical imaging device includes an ultrasound imaging device.

5. The method of claim 1 wherein the medical imaging device uses light energy to obtain the imaging data.

6. The method of claim 5 wherein the medical imaging device includes an optical imaging device.

7. The method of claim 6 wherein the optical imaging device uses optical coherence tomography to process the imaging data.

8. The method of claim 1 wherein the medical imaging device uses magnetic energy to obtain the imaging data.

9. The method of claim 8 wherein the medical imaging device includes a magnetic resonance imaging device.

10. The method of claim 1 wherein the medical imaging device uses x-ray energy to obtain the imaging data.

16. The method of claim 1, further comprising rotating the polar imaging data ninety degrees prior to wrapping the polar imaging data around the cone.

17. The method of claim 1, wherein the medical imaging device comprises at least one imager.

18. The method of claim 17, wherein the at least one imager is rotatable.

19. The method of claim 17, wherein the at least one imager comprises a rotating circular array.

20. The method of claim 1, wherein the medical imaging device comprises at least one of a catheter, an endoscope, a laparoscopic device, an arthroscopic device, an angioplasty device, or a surgical device.

11. A method for converting imaging data in polar format from a medical imaging device to Cartesian format, the method comprising:

providing a medical imaging device configured and arranged for insertion of a probe of the medical imaging device into a patient;

generating imaging data in polar format by the medical imaging device, wherein the generated polar imaging data comprises a single distance R_i and a single angle θ

, for each of at least one physical object from a centerpoint of the imaging data; and

converting the generated polar imaging data into Cartesian format, wherein the conversion of the polar imaging data into Cartesian format, being performed on a computer, comprises wrapping the polar imaging data around a cone, wherein the cone is defined by an inner circle, an outer circle, and a zigzag pattern of lines forming a plurality of triangles of alternating directions connecting points on the inner circle to points on the outer circle.

12. The method of claim 11 wherein the medical imaging device uses acoustic energy to obtain the imaging data.

13. The method of claim 11 wherein the medical imaging device uses light energy to obtain the imaging data.

14. The method of claim 11 wherein the medical imaging device uses magnetic energy to obtain the imaging data.

15. The method of claim 11 wherein the medical imaging device uses x-ray energy to obtain the imaging data.