SYSTEM AND METHOD FOR OPTOACOUSTIC IMAGING OF PERIPHERAL TISSUES

• US 20080228073A1
• Filed: 03/12/2008
• Published: 09/18/2008
• Est. Priority Date: 03/12/2007
• Status: Abandoned Application

• Current Assignee: Riverside Research Institute
• Original Assignee: Riverside Research Institute
• Inventors: Silverman, Ronald H., Ketterling, Jeffrey A.
• Application Number:
  US12/046,975
• Publication Number:
  US 20080228073A1
• Time in Patent Office: Days
• US Class Current: 600/437
• CPC Class Codes: A61B 5/0066 Optical coherence imaging
• CPC Class Codes: A61B 5/0073 by tomography, i.e. reconstruction of 3D images from 2D projections A61B5/0066 takes precedence
• CPC Class Codes: A61B 5/0097 by applying acoustic waves and detecting light, i.e. acoustooptic measurements
• CPC Class Codes: A61B 8/4281 characterised by sound-transmitting media or devices for coupling the transducer to the tissue

Abstract

The system and method for optoacoustic imaging of peripheral tissues provides an assembly for emitting radiation on a tissue and an OCT system coupled to said assembly. The OCT system images tissue concurrent with the emission of radiation on the tissue.

Claims

1. A method for optoacoustic imaging of peripheral tissues comprising:

focusing a light source at points on the peripheral tissue;

focusing ultrasound radiation on the same point;

detecting reflections from the tissue in response to the focused light source; and

monitoring distortions in the detected reflections caused by the focused ultrasound radiation.

2. The method of claim 1, wherein the light source is emitted by an OCT system and the ultrasound radiation is emitted by an assembly, wherein the assembly is combined with the OCT system.

3. The method of claim 1, wherein the light source is emitted simultaneous to the emission of the ultrasound radiation.

4. The method of claim 1, wherein the ultrasound radiation is emitted by an assembly.

5. The method of claim 4, wherein the assembly comprises a fiber optic having a lens integrated with a transducer, said fiber optic having a lens having an axis and a focus, said transducer having an axis and a focus, said transducer having a center.

6. The method of claim 5, wherein the axis of the fiber optic having a lens is aligned with the axis of the transducer.

7. The method of claim 5, wherein the fiber optic having a lens is mounted external to the transducer.

8. The method of claim 7, wherein focus of the fiber optic having a lens coincides with the focus of the transducer.

9. The method of claim 7, wherein the transducer has a hole in the center of the transducer to accommodate the fiber optic having a lens.

10. The method of claim 7, wherein the center of the transducer is optically transparent.

11. The method of claim 10, wherein the center of the transducer is composed of a thin piezoelectric film.

12. A system for optoacoustic imaging of peripheral tissues comprising:

an assembly for emitting at least one ultrasound radiation wave on a tissue, said assembly further including a fiber optic having a lens integrated with a transducer; and

an OCT system, said OCT system coupled to said assembly, said OCT system providing at least one OCT image of said tissue, wherein said image is effected by the emission of ultrasound radiation on the tissue.

13. The system of claim 12, wherein multiple OCT images are obtained as a single ultrasound radiation wave is emitted from the assembly during a time period.

14. The system of claim 12, wherein more than one ultrasound radiation wave is emitted from the assembly during a time period.

15. The system of claim 12, wherein there are time delays for successive radiation waves emitted from the assembly.

16. The system of claim 12, wherein one OCT image is acquired for each radiation wave emitted from the assembly.

17. The system of claim 12, wherein one OCT image is acquired at t=t₀+nt_d.

18. A device comprising:

a fiber optic, said fiber optic having a lens, said fiber optic having an axis and a focus; and

an ultrasound transducer, said transducer having an axis and said focus, said transducer being integrated with said fiber optic forming an assembly, and detection means for detecting variations in reflections from tissue within said focus caused by interaction between said fiber optic radiation and said ultrasound radiation.

19. The device of claim 18, wherein the axis of the fiber optic is aligned with the axis of the transducer.

20. The device of claim 18, wherein the fiber optic is mounted external to the transducer so that the focus of the fiber optic coincides with the focus of the transducer.