SYSTEM, ARRANGEMENT AND PROCESS FOR PROVIDING SPECKLE REDUCTIONS USING A WAVE FRONT MODULATION FOR OPTICAL COHERENCE TOMOGRAPHY

• US 20080002211A1
• Filed: 01/18/2007
• Published: 01/03/2008
• Est. Priority Date: 01/20/2006
• Status: Abandoned Application

• Current Assignee: The General Hospital Corporation (Mass General Brigham, Inc.)
• Original Assignee: The General Hospital Corporation (Mass General Brigham, Inc.)
• Inventors: Park, Boris, De Boer, Johannes
• Application Number:
  US11/624,334
• Publication Number:
  US 20080002211A1
• Time in Patent Office: Days
• US Class Current: 356/512
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/0066 Optical coherence imaging
• CPC Class Codes: G01N 2021/1787 Tomographic, i.e. computerised reconstruction from projective measurements
• CPC Class Codes: G01N 2021/479 Speckle
• CPC Class Codes: G01N 21/4795 spatially resolved investigating of object in scattering medium in vivo A61B

Abstract

Exemplary systems and methods for generating information associated with at least one portion of a sample can be provided. For example, it is possible to receive from the at least one portion and/or transmit to at least one electromagnetic radiation to the portion. At least one first wave front of the electro-magnetic radiation received from and/or transmitted to the portion can be provided to generate at least one first transmitted wave front. After the first transmitted wave front is generated, at least one characteristic of at least one second wave front of the electromagnetic radiation received from and/or transmitted to the portion can be modified to generate at least one second modified wave front which is different from the first transmitted wave front. Further, the information can be generated based on the first transmitted wave front and the second modified wave front.

Claims

1. A system for generating information associated with at least one portion of a sample, comprising:

at least one first arrangement which is configured to;

i) at least one of receive from the at least one portion or transmit to at least one electromagnetic radiation to the at least one portion,

ii) provide at least one first wave front of the at least one electromagnetic radiation at least one of received from or transmitted to the at least one portion to generate at least one first transmitted wave front,

iii) after the first transmitted wave front is generated, modify at least one characteristic of at least one second wave front of the at least one electro-magnetic radiation at least one of received from or transmitted to the at least one portion to generate at least one second modified wave front which is different from the first transmitted wave front; and

at least one second arrangement which is configured to generate the information based on the first transmitted wave front and the second modified wave front.

2. The system according to claim 1, wherein the at least one first arrangement modifies at least one characteristic of the at least one first wave front to generate a first modified wave front prior to the modification of the at least one characteristic of the at least one second wave front.

3. The system according to claim 2, wherein the at least one second arrangement generates the information based on the first and second modified wave fronts.

4. The system according to claim 2, wherein the at least one second arrangement generates further information based on the first and second modified wave fronts, the further information being associated with a particular volume of the at least one portion which is smaller than a focal volume of the at least one portion that receives the at least one electromagnetic radiation.

5. The system according to claim 1, wherein the at least one first arrangement comprises at least one of a micro-deformable mirror, a deformable reflective membrane, a deformable transmissive membrane, an electro-optical spatial light modulation arrangement, a rotating or translating, reflective or transmissive element, or an apparatus which is configure to modify a wave front of the at least one electromagnetic radiation.

6. The system according to claim 1, wherein the at least one second arrangement is configured to average the information to produce resultant data in which a speckle noise is lower than the speckle noise in the information.

7. The system according to claim 1, wherein the at least one first arrangement are situated in a catheter arrangement.

8. The system according to claim 1, wherein the at least one second arrangement comprises an interferometric arrangement which receives at least the first and second wave fronts from a sample arm and a further electromagnetic radiation from a reference arm.

9. The system according to claim 1, wherein the first and second wave fronts are associated with approximately the same focal volume within the at least one portion of the sample.

10. The system according to claim 1, wherein the at least one second arrangement comprises a confocal microscope arrangement.

11. The system according to claim 1, wherein the at least one characteristic of the at least one second wave front of the at least one electromagnetic radiation is a phase of the at least one second wave front, and wherein the at least one first arrangement modifies the phase by at most approximately 2π

.

12. The system according to claim 1, wherein the at least one first arrangement is further configured to compensate for a predetermined wave front distortion associated with at least one of the at least one portion of the sample or an optical beam path within at least one of the first arrangement or the second arrangement.

13. The system according to claim 1, wherein the at least one first arrangement further comprises at least one third arrangement which is at least one of at least one optical fiber or a structure having a pinhole, and wherein the at least one third arrangement is configured to select at least one portion of the at least one electro-magnetic radiation received from the at least one portion of the sample.

14. The system according to claim 1, wherein the information is associated with at least one of a reflectivity of, a motion within or a polarization property of the at least one portion.

15. The system according to claim 1, further comprising a further arrangement which is configured to scan the at least one portion using the at least one electromagnetic radiation over the at least one portion to generate further information which is associated with at least one of a two-dimension image or a three-dimensional image of the at least one portion.

16. The system according to claim 1, wherein the sample includes an anatomical structure.

17. A method for generating information associated with at least one portion of a sample, comprising:

a) receiving from the at least one portion or transmitting to at least one electromagnetic radiation to the at least one portion,

b) providing at least one first wave front of the at least one electromagnetic radiation at least one of received from or transmitted to the at least one portion to generate at least one first transmitted wave front,

c) after the first transmitted wave front is generated, modifying at least one characteristic of at least one second wave front of the at least one electromagnetic radiation at least one of received from or transmitted to the at least one portion to generate at least one second modified wave front which is different from the first transmitted wave front; and

d) generating the information based on the first transmitted wave front and the second modified wave front.

18. The method according to claim 17, further comprising:

e) modifying at least one characteristic of the at least one first wave front to generate a first modified wave front prior to the modification of the at least one characteristic of the at least one second wave front, wherein the information is generated based on the first and second modified wave fronts.

19. The method according to claim 17, further comprising:

f) averaging the information to produce resultant data in which a speckle noise is lower than the speckle noise in the information.

20. The method according to claim 17, further comprising:

g) compensating for a predetermined wave front distortion associated with at least one of the at least one portion of the sample or an optical beam path within at least one arrangement configured to perform at least one of steps (a)-(d).

21. The method according to claim 17, further comprising:

h) generating further information based on the first and second modified wave fronts, the further information being associated with a particular volume of the at least one portion which is smaller than a focal volume of the at least one portion that receives the at least one electromagnetic radiation.