Ultrasound imaging transducer array with integrated apodization

Patent metadata

Field	Value
Publication number	US-10330781-B2
Application number	US-201315105633-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Dec 19, 2013
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A transducer array (802) includes at least one 1D array of transducing elements (804). The at least one 1D array of transducing elements includes a plurality of transducing elements (904). A first of the plurality of transducing elements has a first apodization and a second of the plurality of transducing elements has a second apodization. The first apodization and the second apodization are different. The transducer array further includes at least one electrically conductive element (910) in electrical communication with each of the plurality of transducing elements. The transducer array further includes at least one electrical contact (906) in electrical communication with the at least one electrically conductive element. The at least one electrical contact concurrently addresses the plurality of transducing elements through the at least one electrically conductive element.

First claim

What is claimed is:

1. A transducer array, comprising:
at least one 1D array of transducing elements, the at least one 1D array of transducing elements, including:
a plurality of transducing elements, wherein a first of the plurality of transducing elements has a first fixed area apodization and a second of the plurality of transducing elements has a second fixed area apodization, and the first fixed area apodization and the second fixed area apodization are different,

wherein a transducing element of the first of the plurality of transducing elements has a first shape, a transducing element of the second of the plurality of transducing elements has a second shape, and the first and second shapes are different shapes;
at least one electrically conductive element in electrical communication with each of the plurality of transducing elements; and
at least one electrical contact in electrical communication with the at least one electrically conductive element,
wherein the at least one electrical contact concurrently addresses the plurality of transducing elements through the at least one electrically conductive element.

2. The transducer array of claim 1 , further comprising:
a plurality of the 1D array of transducing elements, physically arranged with respect to each other in a 2D array, wherein each of the plurality of 1D array of transducing elements is independently addressable.

3. The transducer array of claim 2 , wherein one of the plurality of the 1D array of transducing elements is addressable to transmit ultrasound energy, and a second of the plurality of the 1D array of transducing elements is addressable to receive reflected ultrasound waves.

4. The transducer array of claim 2 , wherein each of the plurality of the 1D array of transducing elements includes a first end, a second end and a middle region there between, each of the plurality of the 1D array of transducing elements has a same apodization pattern, and the apodization of each of the plurality of the 1D array of transducing elements is only at the first and second ends, and not at the middle region.

5. The transducer array of claim 2 , wherein at least one of the plurality of transducing elements includes a plurality of sub-elements, each of the plurality of sub-elements having a transducing surface area, and a value of a transducing surface area of the at least one of the plurality of transducing elements is a summation of the transducing surface areas of each of the plurality of sub-elements.

6. The transducer array of claim 5 , wherein at least one of the first value or the second value is dynamically changeable between at least two different values.

7. The transducer array of claim 6 , further comprising:
a switch that electrically connects and disconnects at least one of the plurality of sub-elements with the other of the plurality of sub-elements, wherein the value of the transducing surface area of the at least one of the plurality of transducing elements is a summation of the transducing surface areas of each of the electrically connected plurality of sub-elements.

8. The transducer array of claim 7 , wherein the value of the transducing surface area of the at least one of the plurality of transducing elements does not include a transducing surface area of a sub-element not electrically connected to the plurality of sub-elements.

9. The transducer array of claim 1 , wherein the first of the plurality of transducing elements has a first transducing surface area and the second of the plurality of transducing elements has a second transducing surface area, and a first value of the first transducing surface area and a second value of the second transducing surface area are different.

10. The transducer array of claim 9 , wherein the first apodization is proportional to the first value and the second apodization is proportional to the second value.

11. The transducer array of claim 9 , wherein the first of the plurality of transducing elements has a first geometric surface area and the second of the plurality of transducing elements has a second geometric surface area, and the first geometric surface area and the first transducing surface area are approximately the same and the second geometric surface area and the second transducing surface area are approximately the same.

12. The transducer array of claim 9 , wherein the first value is a fixed single value and the second value is a fixed single value.

13. The transducer array of claim 9 , wherein at least one of the first transducing surface area or the second transducing surface area is dynamically variable and performs time gain compensation.

14. The transducer array of claim 9 , wherein a transducing element of at least one of the first or second of the plurality of transducing elements includes a first number of transducing cells, each of the transducing cells having a transducing area, and at least one of the first or second values is a summation of the areas of the transducing cells.

15. The transducer array of claim 14 , wherein the at least one of the first or second values is a fixed single value.

16. The transducer array of claim 14 , wherein the at least one of the first or second values is a fixed single value is dynamically changeable between at least two different values.

17. The transducer array of claim 16 , further comprising:
a switch that electrically connects and disconnects at least one of the transducing cells with the other of the transducing cells, wherein the first or second value is a summation of the transducing surface areas of each of the electrically connected transducing cells.

18. The transducer array of claim 14 , wherein the plurality of transducing elements includes capacitive micro machined ultrasonic transducer transducing elements.

19. The transducer array of claim 1 , wherein the plurality of transducing elements includes piezoelectric transducing elements.

20. The transducer array of claim 1 , further comprising:
a first voltage source that applies a first bias voltage to the first of the plurality of transducing elements, wherein a first value of the first bias voltage provides the first apodization; and
a second voltage source that applies a second bias voltage to the second of the plurality of transducing elements, wherein a second value of the second bias voltage provides the second apodization,
wherein the first and second values are different values.

21. The transducer array of claim 20 , wherein the first and second voltage sources have fixed voltages, and the first value is a fixed single value and the second value is a fixed single value.

22. The transducer array of claim 20 , wherein the first and second voltage sources have variable voltages, and at least one of the first value or the second value is switchable between two different values.

23. The transducer array of claim 20 , wherein the plurality of transducing elements includes capacitive micro machined ultrasonic transducer transducing elements.

24. The transducer array of claim 20 , wherein at least one of the first and second values of the first and second bias voltages includes a time-gain compensation voltage.

25. The transducer array of claim 1 , wherein the at least one 1D array of transducing elements includes a central region and at least one end region, the first apodization is less than the second apodization, and the first of the plurality of transducing elements is dispos

Assignees

• Bk Medical Aps

Inventors

• Christiansen Thomas Lehrmann
• Rasmussen Morten Fischer
• Thomsen Erik Vilain
• Jensen Jorgen

Classifications

• G01S15/8925

  the array being a two-dimensional transducer configuration, i.e. matrix or orthogonal linear arrays · CPC title

• G01S15/8913

  using separate transducers for transmission and reception · CPC title

• G01S7/52077

  with means for elimination of unwanted signals, e.g. noise or interference · CPC title

• G01S15/8927

  using simultaneously or sequentially two or more subarrays or subapertures · CPC title

• G01S7/52025

  for pulse systems (G01S7/52034 takes precedence) · CPC title