Methods and systems for ultrasound treatment

• US 8,858,471 B2
• Filed: 07/10/2012
• Issued: 10/14/2014
• Est. Priority Date: 07/10/2011
• Status: Expired due to Fees

• Current Assignee: Guided Therapy Systems Llc
• Original Assignee: Guided Therapy Systems Llc
• Inventors: Barthe, Peter G.
• Primary Examiner(s): EVOY, NICHOLAS LANE
• Application Number:
  US13/545,929
• Publication Number:
  US 20130012842A1
• Time in Patent Office: 826 Days
• Field of Search: None
• US Class Current: 601/3
• CPC Class Codes: A61B 18/18 by applying electromagnetic radiation, e.g. microwaves radiation therapy A61N5/00
• CPC Class Codes: A61B 2018/00642 with feedback, i.e. closed loop control
• CPC Class Codes: A61M 37/0092 using ultrasonic, sonic or infrasonic vibrations, e.g. phonophoresis
• CPC Class Codes: A61N 2007/0004 Applications of ultrasound therapy
• CPC Class Codes: A61N 2007/0017 Wound healing
• CPC Class Codes: A61N 2007/0034 Skin treatment
• CPC Class Codes: A61N 2007/0039 using microbubbles
• CPC Class Codes: A61N 2007/0052 using the same transducer for therapy and imaging
• CPC Class Codes: A61N 2007/006 Lenses
• CPC Class Codes: A61N 2007/0073 using multiple frequencies
• CPC Class Codes: A61N 2007/0078 with multiple treatment transducers
• CPC Class Codes: A61N 2007/027 with multiple foci created simultaneously
• CPC Class Codes: A61N 7/00 Ultrasound therapy lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 ; using ultrasound for introducing media into the body A61M37/0092
• CPC Class Codes: A61N 7/02 Localised ultrasound hyperthermia hyperthermia in general A61F7/00

Abstract

A method and system for ultrasound treatment are provided. Acoustic energy, including ultrasound, can serve as input energy to a mask with apertures, such apertures acting as secondary acoustic sources to create a modulated output acoustic energy in a treatment region and treatment effects. Under proper control output energy can be precisely placed and controlled in tissue. In some embodiments, methods and systems are configured for ultrasound treatment based on creating an output energy distribution in tissue. In some embodiments, methods and systems are configured based on creating an output temperature distribution in tissue.

Claims

1. A method for treating tissue with ultrasound energy, the method comprising;

emitting ultrasound energy from primary energy source;

directing the ultrasound energy into a plurality of apertures in a secondary energy source, wherein the plurality of apertures in the secondary energy source are not equivalent, wherein a first group of the plurality of apertures is configured to deliver a first group of the plurality of energy fields to a first depth in the treatment region and a second group of the plurality of apertures is configured to deliver a second group of the plurality of energy fields to a second depth in the treatment region, wherein the first depth is different than the second depth;

converting the ultrasound energy into a plurality of energy fields having an increased intensity than the primary energy source;

delivering the plurality of energy fields into a treatment region comprising the tissue; and

initiating a thermal effect in the treatment region.

2. The method according to claim 1, wherein the thermal effect is one of heating the tissue, and creating a conformal region of elevated temperature m the treatment region.

3. The method according to claim 1, wherein the thermal effect is one of lesion creation in the region of interest, tissue necrosis in a portion of the treatment region;

coagulation of tissue in the treatment region, and exceeding a thermal capacity of tissue in a portion of the treatment region.

4. The method according to claim 1, further comprising controlling at least one of the primary energy source and the secondary energy source.

5. The method according to claim 1, further comprising delivering a photon-based energy into the treatment region and initiating a second treatment effect in the treatment region.

6. The method according to claim 1, further comprising delivering radio frequency energy through the secondary energy source and into the treatment region and initiating a second treatment effect in the treatment region.

7. The method according to claim 1, further comprising controlling a temperature modulator coupled to the secondary energy source and operable to modulate a temperature of the secondary energy source.

8. The method according to claim 1, further comprising imaging at least a portion of the treatment region.

9. The method according to claim 1, further comprise monitoring of at least one of the delivering the plurality of energy fields into a treatment region comprising the tissue and the initiating a thermal effect in the treatment region.

10. The method according to claim 1, wherein the thermal effect initiates peaking inflammation in the injury location and a coagulation cascade in at least a portion of the treatment region.

11. The method according to claim 1, wherein the thermal effect initiates stimulation of collagen growth in a portion of the treatment region.

12. The method according to claim 1, wherein the first group of the plurality of apertures is configured to form a first group of shaped conformal regions of elevated temperature in the treatment region and the second group of the plurality of apertures is configured to form a second group of shaped conformal regions of elevated temperature in the treatment region, wherein the first group of shaped conformal regions of elevated temperature comprise a different volumetric shape than the second group of shaped conformal regions of elevated temperature.

13. A method for providing ultrasound treatment to tissue, the method comprising:

targeting a treatment region comprising tissue;

choosing a primary energy source,

directing an acoustic input energy from a primary energy source through a plurality of mask apertures, wherein the plurality of mask apertures are not equivalent, wherein a first group of the plurality of apertures is configured to form a first group of shaped conformal regions of elevated temperature in the treatment region and a second group of the plurality of apertures is configured to form a second group of shaped conformal regions of elevated temperature in the treatment region, wherein the first group of shaped conformal regions of elevated temperature comprise a different volumetric shape than the second group of shaped conformal regions of elevated temperature;

creating an acoustic output energy comprising a plurality of ultrasound fields, each having an increased intensity as compared to the input energy;

delivering the output energy into a plurality of locations in the treatment region; and

producing a treatment effect on at least a portion of tissue in the treatment region.

14. The method according to claim 13, wherein the treatment effect on the tissue is at least one of coagulation, increased perfusion, reduction of inflammation, generation of heat shock proteins, and initiation of healing cascade.

15. The method according to claim 13, wherein the treatment effect on tissue is peaking inflammation in the tissue at an injury location and initiating a coagulation cascade in at least a portion of the tissue in the injury location.

16. The method according to claim 13, wherein the treatment effect is stimulating collagen growth in a portion of the tissue in the treatment region.

17. The method according to claim 13, wherein the treatment effect is one of lesion creation in the region of interest, tissue necrosis in a portion of the treatment region;

coagulation of a portion of the tissue in the treatment region, and exceeding a thermal capacity of the tissue in a portion of the treatment region.

18. The method according to claim 13, further comprising imaging at least a portion of the treatment region.