Diagnostic medical ultrasound systems and transducers utilizing micro-mechanical components

• US 6,645,145 B1
• Filed: 09/24/2001
• Issued: 11/11/2003
• Est. Priority Date: 11/19/1998
• Status: Expired due to Term

• Current Assignee: Siemens Medical Solutions USA Incorporated (Siemens AG)
• Original Assignee: Siemens Medical Solutions USA Incorporated (Siemens AG)
• Inventors: Sliwa, John W., Ayter, Sevig, Kling, Terry, Dreschel, William R., Carp, Stuart L.
• Primary Examiner(s): Imam, Ali M.
• Application Number:
  US09/962,427
• Time in Patent Office: 778 Days
• Field of Search: 600/407, 600/437, 600/443, 600/447, 600/459, 600/463, 600/466-471, 367/153, 367/7, 367/11, 367/138, 367/174, 367/18.D, 367/175, 367/181, 367/163, 216/17, 216/27, 438/455-465, 438/689-703, 438/713, 381/174, 381/423, 381/425, 381/191, 736/25, 736/26, 29/253.5, 310/314-369, 607/122, 601/2, 601/3, 257/415, 257/40, 257/291-293, 257/443, 257/444, 342/367-377, 343/767
• US Class Current: 600/443
• CPC Class Codes: A61B 8/445 Details of catheter construction
• CPC Class Codes: A61B 8/4483 characterised by features of the ultrasound transducer
• CPC Class Codes: B06B 1/00 Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
• CPC Class Codes: H01H 59/0009 making use of micromechanics

Abstract

The use of any micro-mechanical component in an ultrasound system is disclosed. In particular, the use of micro-mechanical ultrasound transducers, micro-relays, micro-switches and inductors in the transducer probe head, in the transducer connector, coupled with the system transducer connector(s) or anywhere else in the system. In an ultrasound system, micro-mechanical components such as micro-mechanical ultrasound transducers, micro-fabricated switches, relays and inductors permit impressive size reduction, cost reduction, signal-integrity enhancement and improved operational flexibility.

Claims

1. A diagnostic medical ultrasound probe for use within a patient comprising:

a housing, said housing being insertable into said patient; and

at least one array comprising a plurality of ultrasonic acoustic elements located in said housing, each of said plurality of ultrasonic acoustic elements operative to transduce between an electrical signal and an acoustic energy, said at least one ultrasonic acoustic element being coupled with at least one micro-mechanical component, said at least one micro-mechanical component being operative to manipulate said electrical signal.

2. The diagnostic medical ultrasound probe of claim 1, wherein said probe is operative to be used in endoluminal applications.

3. The diagnostic medical ultrasound probe of claim 1, wherein said probe is operative to be used in intracardiac applications.

4. The diagnostic medical ultrasound probe of claim 1, wherein said housing comprises a polymeric material.

5. The diagnostic medical ultrasound probe of claim 1, wherein said housing comprises a maximum cross-sectional dimension less than 2 mm.

6. The diagnostic medical ultrasound probe of claim 1, wherein said at least one array comprises a maximum length less than 10 mm and a maximum width less than 4 mm.

7. The diagnostic medical ultrasound probe of claim 1, wherein said at least one array comprises a capacitive micro-mechanical ultrasound transducer array.

8. The diagnostic medical ultrasound probe of claim 1, wherein each of said plurality of ultrasonic acoustic elements is a micro-mechanical ultrasound element.

9. The diagnostic medical ultrasound probe of claim 8, wherein each of said plurality of ultrasonic acoustic elements comprises a flexible membrane.

10. The diagnostic medical ultrasound probe of claim 9, wherein each of said plurality of ultrasound acoustic elements further comprises an electrode on each side of said flexible membrane.

11. The diagnostic medical ultrasound probe of claim 1, wherein said at least one array comprises a one dimensional array.

12. The diagnostic medical ultrasound probe of claim 1, wherein said at least one array comprises a two dimensional array.

13. The diagnostic medical ultrasound probe of claim 1, further comprising at least one second micro-mechanical component operative to multiplex at least one signal generated by said at least one array.

14. The diagnostic medical ultrasound probe of claim 13, wherein said at least one second micro-mechanical component comprises a micro-mechanical switch.

15. The diagnostic medical ultrasound probe of claim 13, wherein said at least one second micro-mechanical component comprises a micro-mechanical relay.

16. The diagnostic medical ultrasound probe of claim 1, further comprising at least one second micro-mechanical component operative to amplify at least one signal generated by said at least one array.

17. The diagnostic medical ultrasound probe of claim 1, wherein said at least one array comprises at least a first array for imaging and a second array for motion tracking.

18. The diagnostic medical ultrasound probe of claim 1, wherein said housing further comprises a first end comprising a first working port and said at least one array and operative to be inserted into a subject, said first working port being located proximate to said at least one array, said housing further comprising a second end comprising a second working port coupled with said first working port through which an insertable device may be passed.

19. The diagnostic medical ultrasound probe of claim 1, said probe operative to deliver a drug.

20. The diagnostic medical ultrasound probe of claim 1, said probe operative to deliver a contrast agent.

21. The diagnostic medical ultrasound probe of claim 1 further comprising a tissue ablation device.

22. The diagnostic medical ultrasound probe of claim 1, said probe operative to perform electrical surface mapping.

23. The diagnostic medical ultrasound probe of claim 1 further comprising a biopsy device.

24. The diagnostic medical ultrasound probe of claim 1, said probe operative to deliver an implantable device.

25. The diagnostic medical ultrasound probe of claim 1 further comprising a spatial positioning device.

26. The diagnostic medical ultrasound probe of claim 1 further being autoclavable.

27. The diagnostic medical ultrasound probe of claim 1 further being disposable.

28. The diagnostic medical ultrasound probe of claim 1, wherein said at least one micro-mechanical component is operative to manipulate the acoustic spectra of said at least one of said plurality of ultrasonic acoustic elements.

29. A catheter mounted transducer for use in an ultrasound system for medical imaging or therapy, said catheter mounted transducer comprising:

at least one ultrasonic acoustic element, said at least one ultrasonic acoustic element operative to transduce between an electrical signal and an acoustic energy; and

at least one micro-mechanical component coupled with said at least one ultrasonic acoustic element and operative to manipulate said electrical signal.

30. The transducer of claim 29, wherein said catheter mounted transducer is disposable.

31. A transducer for use in an ultrasound system for medical imaging or therapy, said transducer comprising:

a catheter;

at least one ultrasonic acoustic element mounted on said catheter, said at least one ultrasonic acoustic element operative to transduce between an electrical signal and an acoustic energy; and

at least one micro-mechanical component coupled with said at least one ultrasonic acoustic element and operative to manipulate said electrical signal.

32. The transducer of claim 31, wherein said catheter is disposable.

33. The transducer of claim 31, wherein the at least one ultrasonic acoustic element comprises said at least one micro-mechanical component.

34. The transducer of claim 33, wherein said at least one ultrasonic acoustic element comprises a CMUT.

35. The transducer of claim 31, wherein said transducer supports at least one imaging modality.

36. The transducer of claim 35, wherein said at least one imaging modality comprises a harmonic imaging modality.

37. The transducer of claim 31, further comprising an array of said at least one ultrasonic acoustic element.

38. The transducer of claim 37 wherein said array comprises a two dimensional array.

39. The transducer of claim 31, wherein emitted ultrasonic energy from said ultrasonic acoustic element is steerable in at least one plane.

40. A diagnostic medical ultrasound probe for use within a patient comprising:

a housing, said housing being insertable into said patient; and

at least one array comprising a plurality of ultrasonic acoustic elements located in said housing, said at least one ultrasonic acoustic element comprising at least one micro-mechanical component;

wherein said housing further comprises a first end comprising a first working port and said at least one array and operative to be inserted into a subject, said first working port being located proximate to said at least one array, said housing further comprising a second end comprising a second working port coupled with said first working port through which an insertable device may be passed.