Methods and systems for coupling and focusing acoustic energy using a coupler member

• US 8,764,687 B2
• Filed: 05/07/2008
• Issued: 07/01/2014
• Est. Priority Date: 05/07/2007
• Status: Active Grant

• Current Assignee: Guided Therapy Systems Llc
• Original Assignee: Guided Therapy Systems Llc
• Inventors: Slayton, Michael H, Barthe, Peter G., Jaeger, Paul M.
• Primary Examiner(s): Roy, Baisakhi
• Application Number:
  US12/116,828
• Publication Number:
  US 20080281237A1
• Time in Patent Office: 2,246 Days
• Field of Search: 424/9.5, 606/27, 600/437, 600/573, 366/127
• US Class Current: 601/2
• CPC Class Codes: A61B 8/42 Details of probe positioning or probe attachment to the patient
• CPC Class Codes: A61B 8/4272 involving the acoustic interface between the transducer and the tissue
• CPC Class Codes: A61B 8/4281 characterised by sound-transmitting media or devices for coupling the transducer to the tissue
• CPC Class Codes: A61B 8/46 Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient
• CPC Class Codes: A61K 49/226 Solutes, emulsions, suspensions, dispersions, semi-solid forms, e.g. hydrogels
• CPC Class Codes: G10K 11/02 Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
• CPC Class Codes: G10K 11/30 using refraction, e.g. acoustic lenses

Abstract

An exemplary system for coupling acoustic energy using an encapsulated coupler member comprises a display or indicator, a control system, a probe, and a coupler member. This invention provides a coupler member adjustably configured to perform at least one of (i) providing a standoff, (ii) focusing or defocusing energy, and (iii) coupling energy. An exemplary gel coupler member is configured to hold the shape of a lens geometry. In one aspect of the present invention, gel coupler member comprises water, glycerol, and polyvinyl alcohol, and exhibits an increased desiccation time and shelf life when compared to the prior art. The probe can comprise various probe and/or transducer configurations. In an exemplary embodiment, the probe delivers focused, unfocused, and/or defocused ultrasound energy to the region of interest. Imaging and/or monitoring may alternatively be coupled and/or co-housed with an ultrasound system contemplated by the present invention.

Claims

1. A system for coupling acoustic energy to a region of interest comprising:

a crystallized gel comprising water in an amount of from about 10% to about 90% mass, and polyvinyl alcohol in an amount of from about 2% to about 30% mass;

a lens shaped into the crystallized gel;

an ultrasound transducer integrated into the crystallized gel and positioned to emit ultrasound energy through the lens, wherein the crystallized gel is configured to at least one of raise and lower an attenuation of the ultrasound energy;

at least one acoustic impedance matching layer positioned in a path of the ultrasound energy;

an enclosure coupled to the crystallized gel;

at least one of a power supply within the enclosure, the power supply coupled to the ultrasound transducer and configured to provide power to the ultrasound transducer to emit the ultrasound energy;

a controller within the enclosure, and configured to control power and frequency of the ultrasound energy;

a sensor in communication with the controller and configured to communicate a condition of the ultrasound energy; and

an indicator displaying the condition of the ultrasound energy.

2. The system according to claim 1, wherein the crystallized gel further comprises a surfactant configured for the crystallized gel to be free of bubbles.

3. The system according to claim 1, wherein the crystallized gel is free of bubbles.

4. The system according to claim 1, wherein the crystallized gel is configured to alter at least one of an acoustic impedance and an acoustic velocity of the ultrasound energy.

5. The system according to claim 1, wherein the crystallized gel is configured for direct contact to a surface above a region of interest, and is configured to couple the ultrasound enemy emitted by the transducer to the region of interest.

6. A system for coupling acoustic energy to a region of interest comprising:

a crystallized gel comprising water in an amount of from about 10% to about 90% mass, an and polyvinyl alcohol in an amount of from about 2% to about 30% mass;

a lens shaped into the crystallized gel;

an ultrasound transducer integrated into the crystallized gel and positioned to emit ultrasound energy through the lens wherein the crystallized gel is configured to alter at least one of an acoustic impedance and an acoustic velocity of the ultrasound energy;

at least one acoustic impedance matching layer positioned in a path of the ultrasound energy;

an enclosure coupled to the crystallized gel;

at least one of a power supply within the enclosure, the power supply coupled to the ultrasound transducer and configured to provide power to the ultrasound transducer to emit the ultrasound energy;

a controller within the enclosure; and

configured to control power and frequency of the ultrasound energy;

a sensor in communication with the controller and configured to communicate a condition of the ultrasound energy; and

an indicator displaying the condition of the ultrasound energy.

7. The system according to claim 6, wherein the crystallized gel further comprises a surfactant configured for the crystallized gel to be free of bubbles.

8. The system according to claim 6, wherein the crystallized gel is configured to lower an attenuation of the ultrasound energy.

9. The system according to claim 6, wherein the crystallized gel is free of bubbles.

10. The system according to claim 6, wherein the crystallized gel is configured for direct contact to a surface above a region of interest, and is configured to couple the ultrasound energy emitted by the transducer to the region of interest.

11. A system for coupling acoustic energy to a region of interest comprising:

a crystallized gel comprising water in an amount of from about 10% to about 90% mass, and polyvinyl alcohol in an amount of from about 2% to about 30% mass; and

a lens shaped into the crystallized gel;

an ultrasound transducer integrated into the crystallized gel and positioned to emit ultrasound energy through the lens;

at least one acoustic impedance matching layer positioned in a path of the ultrasound energy;

an enclosure coupled to the crystallized gel;

at least one of a power supply within the enclosure, the power supply coupled to the ultrasound transducer and configured to provide power to the ultrasound transducer to emit the ultrasound energy;

a controller within the enclosure, and configured to control power and frequency of the ultrasound energy;

a sensor in communication with the controller and configured to communicate a condition of the ultrasound energy; and

an indicator displaying the condition of the ultrasound energy;

wherein the crystallized gel is configured for direct contact to a surface above a region of interest, and is configured to couple the ultrasound energy emitted by the transducer to the region of interest.

12. The system according to claim 11, wherein the crystallized gel further comprises a surfactant configured for the crystallized gel to be free of bubbles.

13. The system according to claim 11, wherein the crystallized gel is configured to lower an attenuation of the ultrasound energy.

14. The system according to claim 11, wherein the crystallized gel is free of bubbles.

15. The system according to claim 11, wherein the crystallized gel is configured to alter at least one of an acoustic impedance and an acoustic velocity of the ultrasound energy.