Imaging transducer assembly

• US 7,081,094 B2
• Filed: 03/28/2003
• Issued: 07/25/2006
• Est. Priority Date: 03/28/2003
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Ostrovsky, Isaac
• Primary Examiner(s): Jaworski, Francis J.
• Application Number:
  US10/401,901
• Publication Number:
  US 20040193041A1
• Time in Patent Office: 1,215 Days
• Field of Search: 600459-471, 128/899
• US Class Current: 600/466
• CPC Class Codes: A61B 5/062 using magnetic field
• CPC Class Codes: A61B 8/12 in body cavities or body tracts, e.g. by using catheters catheters per se A61M25/00
• CPC Class Codes: A61B 8/4254 using sensors mounted on the probe
• CPC Class Codes: A61B 8/4461 Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe

Abstract

The present invention is generally directed towards an imaging transducer assembly. Generally, the imaging transducer assembly is combined with a sensor of a medical positioning system. In one aspect, the transducer assembly and the sensor share the same voltage source. In another aspect of the invention, the sensor surrounds a portion of the imaging transducer assembly, forming a housing that reinforces the assembly.

Claims

1. An imaging catheter having distal and proximal ends and a lumen, comprising:

an imaging transducer assembly located within the lumen of a distal portion of the catheter, the imaging transducer assembly including an imaging transducer; and

a sensor coupled to the imaging transducer within the lumen, the sensor adapted to communicate with a medical positioning system, wherein the sensor includes an antenna portion having first and second terminals, and wherein the imaging transducer assembly has a first and second transducer terminal, the first transducer terminal being coupled to a first wire and the second transducer terminal being coupled to a second wire, the imaging transducer assembly and the sensor are coupled to the first and second terminals, the first wire is coupled with one of the first and second terminals and the second wire is coupled with the other of the first and second terminals.

2. The imaging catheter of claim 1, wherein the first wire is a center wire of a coaxial cable and the second wire is an outer wire of the coaxial cable.

3. The imaging catheter of claim 1, wherein the first wire is one wire of a cable with twisted pair wires and the second wire is the other wire of the cable with twisted pair wires.

4. An imaging device for use within the lumen of a blood vessel comprising:

a coaxial cable having an inner wire and an outer wire;

a non-conductive epoxy layer surrounding the coaxial cable;

a drive shaft coil, having distal and proximal ends, surrounding the non-conductive epoxy layer;

an imaging transducer assembly coupled to the distal portion of the coaxial cable, wherein the imaging transducer includes a first and second terminal; and

a sensor having an antenna portion coupled to the first and second terminals;

wherein one of the first and second terminals is coupled with the inner wire of the coaxial cable and the other of the first and second terminals is coupled with the outer wire.

5. The imaging device of claim 4, wherein the sensor is a conductive wire wrapped around the drive shaft coil, forming a coil shape.

6. The imaging device of claim 4, wherein the antenna portion of the sensor surrounds the drive shaft forming a housing around the imaging transducer assembly.

7. The imaging device of claim 4, wherein the antenna portion of the sensor is a conductive wire.

8. The imaging device of claim 7, wherein the wire is copper.

9. The imaging device of claim 4, wherein the imaging transducer assembly comprises an acoustic lens coupled with a piezoelectric crystal layer, and the piezoelectric crystal layer is coupled with a backing material.

10. The imaging device of claim 9, wherein the backing material comprises tungsten.

11. The imaging device of claim 9, wherein acoustic lens is electrically coupled with one of the first and second terminals and the backing material is electrically coupled with the other of the first and second terminals.

12. The imaging device of claim 4, further comprising a sonolucent media in the lumen, wherein at least one of the first and second terminals is insulated from the sonolucent media in contact with the imaging transducer assembly.

13. A medical imaging system comprising:

a medical positioning system; and

an imaging device adapted to be inserted into a lumen of a body, the imaging device including;

a catheter having distal and proximal ends and a lumen;

an imaging transducer assembly located within the lumen of a distal portion of the catheter, the imaging transducer assembly including an imaging transducer; and

a sensor coupled to the imaging transducer within the lumen of the catheter, the sensor adapted to communicate with the medical positioning system,

wherein the sensor includes an antenna portion having first and second terminals, and wherein the imaging transducer assembly has a first and second transducer terminal, the first transducer terminal being coupled to a first wire and the second transducer terminal being coupled to a second wire, the imaging transducer assembly and the sensor are coupled to the first and second terminals, the first wire is coupled with one of the first and second terminals and the second wire is coupled with the other of the first and second terminals.

14. The medical imaging system of claim 13, wherein the first wire is a center wire of a coaxial cable and the second wire is an outer wire of the coaxial cable.

15. The medical imaging system of claim 14, wherein the first wire is one wire of a cable with twisted pair wires and the second wire is the other wire of the cable with twisted pair wires.