Ultrasound transducer with non-uniform elements

• US 7,652,410 B2
• Filed: 08/01/2006
• Issued: 01/26/2010
• Est. Priority Date: 08/01/2006
• Status: Active Grant

• Current Assignee: InSightec Ltd.
• Original Assignee: InSightec Ltd.
• Inventors: Prus, Oleg
• Primary Examiner(s): Benson; Walter
• Assistant Examiner(s): Gordon; Bryan P
• Application Number:
  US11/461,763
• Publication Number:
  US 20080030104A1
• Time in Patent Office: 1,274 Days
• Field of Search: 310/334, 310/347, 310/437, 310/359, 600/437, 600/459, 600/457, 367/157
• US Class Current: 310/334
• CPC Class Codes: A61N 2007/0078 with multiple treatment transducers
• CPC Class Codes: A61N 7/02 Localised ultrasound hyperthermia hyperthermia in general A61F7/00
• CPC Class Codes: B06B 1/0622 on one surface
• CPC Class Codes: G01S 15/8925 the array being a two-dimensional transducer configuration, i.e. matrix or orthogonal linear arrays
• CPC Class Codes: G01S 15/8927 using simultaneously or sequentially two or more subarrays or subapertures

Abstract

An ultrasound transducer comprises a multiplicity of piezoelectric transducer elements attached to a backing layer and forming a two-dimensional array, the transducer elements each comprising one or more piezoelectric members that collectively form an energy transmitting surface of the respective transducer element, the energy transmitting surface having a geometric center, wherein the respective transducer element geometric centers are in an irregular formation.

Claims

1. An ultrasound transducer, comprising:

a two-dimensional array comprising a plurality of transducer elements, each transducer element (i) comprising a grouping of piezoelectric members, (ii) wherein elements in each grouping receive the same input signal and (iii) having a geometric center, such that the grouped piezoelectric members form a single energy transmitting surface of the respective transducer element, and wherein the geometric centers are arranged in an irregular formation.

2. The ultrasound transducer of claim 1, wherein transducer elements of the array have irregularly shaped energy transmitting surfaces.

3. The ultrasound transducer of claim 2, wherein the transmitting surfaces have shapes including at least one of an L-shape, a rectangular shape, a T-shape, or an S-shape.

4. The ultrasound transducer of claim 2, wherein the transducer elements of the array are arranged in an interlocking configuration.

5. The ultrasound transducer of claim 2, wherein the piezoelectric members have rectilinear profiles.

6. The ultrasound transducer of claim 2, wherein the piezoelectric members have curvilinear profiles.

7. The ultrasound transducer of claim 1, wherein the transducer is an imaging transducer.

8. The ultrasound transducer of claim 1, wherein the transducer is a therapeutic energy transducer.

9. The ultrasound transducer of claim 1, wherein adjacent transducer elements of the array have respective energy transmitting surfaces with different shapes.

10. The ultrasound transducer of claim 1, wherein three or more transducer elements having different surface lengths form a row of the array such that the distance between the geometric centers of any two transducer elements of the row is different than the distance between the geometric centers of any other two transducer elements the row.

11. An ultrasound transducer, comprising:

a two-dimensional array of non-uniformly shaped transducer elements, each transducer element comprising a grouping of substantially uniform piezoelectric members coupled to a single input signal and which collectively form a single energy transmitting surface of the respective transducer element.

12. The ultrasound transducer of claim 11, wherein the non-uniformly shapes comprise at least one of an L-shape, a rectangular shape, a T-shape, and an S-shape.

13. The ultrasound transducer of claim 11, wherein the elements are arranged in an interlocking configuration.

14. The ultrasound transducer of claim 11, wherein the piezoelectric members have rectilinear profiles.

15. The ultrasound transducer of claim 11, wherein the piezoelectric members have substantially same surface areas.

16. The ultrasound transducer of claim 11, wherein the transducer is an imaging transducer.

17. The ultrasound transducer of claim 11, wherein the transducer is a therapeutic energy transducer.

19. The ultrasound transducer of claim 11, wherein the groups are arranged in an interlocking configuration.

18. A high density ultrasound transducer configured for delivering therapeutic energy for heating body tissue, the transducer comprising:

a two-dimensional array comprising a plurality of transducer elements, each transducer element (i) comprising a grouping of piezoelectric members, (ii) wherein the elements in each grouping receive the same a single input signal and (iii) having a geometric center, the piezoelectric members forming a single energy transmitting surface of the respective transducer element, wherein;

the transducer elements of the array have irregularly shaped energy transmitting surfaces such that the geometric centers are arranged in an irregular formation, and

the transducer elements of the array are arranged in an interlocking configuration.