# US 2014/0194746 A1 · Ivus system with rotary capacitive coupling

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- Number: US 2014/0194746 A1
- Document ID: US20140194746A1
- Status: Published application
- Kind: A1
- Application number: 14/208,896
- Filed: 2014-03-13
- Published: 2014-07-10
- Earliest claimed: 2008-05-15
- Assignees: ACIST Medical Systems, Inc.
- Applicants: Acist Medical Systems, Inc.
- Inventors: Thomas C. Moore; Robert Zelenka
- Web page: https://patentgrep.com/patent/US20140194746A1

## CPC

- A61B 8/4461: {Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe}
- H01P 1/067: {the energy being transmitted in only one line located on the axis of rotation}
- A61B 8/12: in body cavities or body tracts, e.g. by using catheters
- H01P 1/068: {the energy being transmitted in at least one ring-shaped transmission line located around the axis of rotation, e.g. "around the mast" rotary joint (H01P1/069 takes precedence; coaxial line with solid inner conductor H01P1/067)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B)

## Abstract

An imaging system comprises a catheter having a lumen, a rotatable imaging probe within the catheter lumen including a distal transducer and first and second conductors coupled to the transducer, and a coupler that couples the rotatable first and second conductors to non-rotatable third and fourth conductors, respectively. The coupler includes a rotary capacitive coupler.

## Claims

### Claim 1

An imaging system comprising:
a catheter having a lumen;
a rotatable imaging probe within the catheter lumen including a rotatable distal transducer and rotatable first and second conductors coupled to the transducer; and
a rotary capacitive coupler that couples the rotatable first and second conductors to non-rotatable third and fourth conductors, respectively, the rotary capacitive coupler including a parallel plate capacitor mounted within a cylindrical surface concentric capacitor.

### Claim 2 (depends on 1)

The system of claim 1, wherein the parallel plate capacitor couples the first conductor to the third conductor and the cylindrical surface concentric capacitor couples the second conductor to the fourth conductor.

### Claim 3 (depends on 1)

The system of claim 1, wherein the rotary capacitive coupler is within the catheter.

### Claim 4 (depends on 1)

The system of claim 1, wherein the rotary capacitive coupler is outside of the catheter.

### Claim 5 (depends on 1)

The system of claim 1, wherein the cylindrical surface concentric capacitor includes a rotatable drum and a non-rotatable drum positioned concentrically, the rotatable drum operatively coupled to a motor and a drive shaft.

### Claim 6 (depends on 5)

The system of claim 5, wherein the non-rotatable drum acts as a shield to electrical noise for the parallel plate capacitor.

### Claim 7 (depends on 5)

The system of claim 5, wherein the rotatable drum is operatively coupled to a motor and a drive shaft.

### Claim 8 (depends on 1)

The system of claim 1, further comprising a catheter interface module, and wherein the rotary capacitive coupler is contained within the catheter interface module.