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WO1994017734B1 - Ultrasound catheter - Google Patents

Ultrasound catheter

Info

Publication number
WO1994017734B1
WO1994017734B1 PCT/US1994/000474 US9400474W WO9417734B1 WO 1994017734 B1 WO1994017734 B1 WO 1994017734B1 US 9400474 W US9400474 W US 9400474W WO 9417734 B1 WO9417734 B1 WO 9417734B1
Authority
WO
WIPO (PCT)
Prior art keywords
transducer
electrical signals
section
integrated electronic
transducer array
Prior art date
Application number
PCT/US1994/000474
Other languages
French (fr)
Other versions
WO1994017734A1 (en
Filing date
Publication date
Priority claimed from US08/012,251 external-priority patent/US5368037A/en
Application filed filed Critical
Priority to AT94906070T priority Critical patent/ATE236573T1/en
Priority to DE69432448T priority patent/DE69432448T2/en
Priority to JP51804094A priority patent/JP3732854B2/en
Priority to EP94906070A priority patent/EP0637937B1/en
Publication of WO1994017734A1 publication Critical patent/WO1994017734A1/en
Publication of WO1994017734B1 publication Critical patent/WO1994017734B1/en

Links

Abstract

An ultrasound catheter (10) is disclosed for providing substantially real-time images of small cavities. The ultrasound catheter (10) is characterized by separate and distinct materials for backing the transducers (22) and for carrying the electronics components (18). The separate materials comprise an electronics carrier (20) meeting the requirements for holding the integrated circuitry (18) of the ultrasound device and a backing material (24) displaying superior characteristics relating to reducing ringing and minimizing the effect of other sources of signal degradation in the transducer assembly. Also, in accordance with the present invention, a technique is described for connecting the conductor lines of the separate transducer assembly and electronics body.

Claims

26AMENDED CLAIMS[received by the International Bureau on 1 August 1994 (01.08.94); original claims 1-17 replaced by amended claims 1-17 (5 pages)]
1. An ultrasound catheter probe for insertion into a vasculature and emitting ultrasonic acoustic waves and providing transduced electrical signals arising from ultrasonic echoes of the ultrasonic acoustic waves, said ultrasound catheter probe comprising: a multi-sectioned body having distinct sections for independently supporting a transducer array and integrated electronic circuitry, the multi-sectioned body comprising: a first section, comprising a first material, serving as a transducer backing and having a relatively high acoustic energy absorption in comparison to a second section, comprising a second material, for supporting integrated electronic circuitry; a transducer assembly, mounted upon the first section of the multi-sectioned body, including the transducer array for transmitting the ultrasonic acoustic waves into the vasculature and generating first electrical signals in accordance with the ultrasonic echoes of the ultrasonic acoustic waves; integrated electronic signal conversion circuitry, mounted upon the second section of the multi-sectioned body, for receiving the first electrical signals from the transducer assembly, converting the first electrical signals to second electrical signals, and transmitting the second electrical signals to an environment external of the vasculature via a cable including at least one signal channel for transmitting the second electrical signals; and a plurality of electrical transmission paths between the transducer array and the integrated electronic signal conversion circuitry for communicating the first electrical signals from the transducer array to the integrated electronic signal conversion circuitry.
2. The ultrasound catheter probe of claim 1 wherein the first section and the second section are mounted adjacently upon a guide wire lumen.
3. The imaging device of claim 1 wherein the first material has a relatively low acoustic impedance.
4. The imaging device of claim 1 wherein the second material has a relatively low thermal expansion coefficient in comparison to the first material.
5. The ultrasound catheter probe of claim 1 wherein the transducer assembly includes a plurality of conducting electrodes bonded directly to a transducer layer.
6. The ultrasound catheter probe of claim 1 wherein the transducer assembly includes a continuous layer conducting electrode bonded directly to a transducer layer.
7. The ultrasound catheter probe of claim 1 wherein the transducer assembly includes a transducer array configured in a cylindrical shape.
8. The ultrasound catheter probe of claim 1 wherein the transducer assembly includes a transducer array configured in a planar shape.
9. The ultrasound catheter probe of claim 8 wherein the transducer array is disposed upon a side of the multi- sectioned body in order to provide a side-looking view within the cavity.
10. The ultrasound catheter probe of claim 8 wherein the transducer array is disposed upon a front of the multi-sectioned body in order to provide a forward-looking view within the cavity. 28
11. The ultrasound catheter probe of claim 1 further comprising a balloon section positioned proximate the multi-sectioned body.
12. The ultrasound catheter probe of claim 11 wherein the balloon is positioned at a portion of a catheter which is inserted ahead of the multi-sectioned body.
13. The ultrasound catheter probe of claim 1 wherein said plurality of electrical transmission paths includes a set of transducer contacts coupled to a plurality of conducting electrodes of the transducer array and extending laterally from the transducer array thereby facilitating connection of the plurality of conducting electrodes to a plurality of conducting lines disposed upon the second section and electrically coupled to the integrated electronic signal conversion circuitry.
14. The ultrasound catheter probe of claim 13 wherein said set of transducer contacts overlap the plurality of conducting lines, thereby facilitating the use of a gap welder to fuse ones of the set of transducer contacts to corresponding ones of the plurality of conductor lines.
15. An ultrasound imaging catheter for insertion into a vasculature and emitting ultrasonic acoustic waves and providing transduced electrical signals arising from ultrasonic echoes of the ultrasonic acoustic waves, said imaging catheter comprising: a shaft containing at least one lumen; and an ultrasound probe mounted upon the shaft, said imaging device comprising: a multi-sectioned body having distinct sections for independently supporting a transducer array and integrated electronic circuitry, the multi-sectioned 29
body comprising: a first section, comprising a first material, serving as a transducer backing and having a relatively high acoustic energy absorption in comparison to a second section, comprising a second material, for supporting integrated electronic circuitry; a transducer assembly, mounted upon the first section of the multi-sectioned body, including the transducer array for transmitting the ultrasonic acoustic waves into the vasculature and generating first electrical signals in accordance with the ultrasonic echoes of the ultrasonic acoustic waves; integrated electronic signal conversion circuitry, mounted upon the second section of the multi-sectioned body, for receiving the first electrical signals from the transducer assembly, converting the first electrical signals to second electrical signals, and transmitting the second electrical signals to an environment external of the vasculature via a cable including at least one signal channel for transmitting the second electrical signals; and a plurality of electrical transmission paths between the transducer array and the integrated electronic signal conversion circuitry for communicating the first electrical signals from the transducer array to the integrated electronic signal conversion circuitry.
16. A method for assembling an ultrasound intravascular catheter probe having a multi-sectioned body for independently supporting a transducer array and integrated electronic circuitry, the multi-sectioned body having a first section consisting of a transducer backing and a second section for supporting the integrated electronic circuitry, said method comprising the steps of: mounting upon the first section of the multi- sectioned body a transducer assembly including the 30
transducer array for transmitting ultrasonic acoustic waves into the vasculature and generating first electrical signals in accordance with ultrasonic echoes of the ultrasonic acoustic waves, said transducer assembly including a set of transducer contacts coupled to a plurality of conducting electrodes and extending laterally from the transducer array; mounting upon the second section of the multi- sectioned body integrated electronic signal conversion circuitry for receiving the first electrical signals from the array of transducers and converting the first electrical signals to second electrical signals transmitted by a cable connecting the integrated electronic signal conversion circuitry to an environment external of the vasculature and including at least one signal channel for transmitting the second electrical signals; bringing the first and second sections in proximate position so that ones of the set of transducer contacts overlap corresponding ones of a set of conductor lines communicatively connected to the integrated electronic signal conversion circuitry; and applying a localized electrical current source to overlapping transducer contacts and conductor lines, thereby fusing ones of the transducer contacts to ones of the conductor lines.
17. The method of claim 16 wherein the applying step comprises applying localized electrical current to each of the overlapping transducer contacts and conductor lines by means of a gap welder. 31
STATEMENT UNDER ARTICLE19
The above claim amendments are submitted to more generically define that which the applicant regards as its invention. Additionally, the amended claims include additional species of the invention. The amended claims are fully supported by the subject matter of the original priority document. The applicant believes that the amended claims are clearly supported by the description and the drawings of this international application, and as such do not go beyond the disclosure in the application as filed.
PCT/US1994/000474 1993-02-01 1994-01-14 Ultrasound catheter WO1994017734A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT94906070T ATE236573T1 (en) 1993-02-01 1994-01-14 ULTRASONIC CATHETER SENSOR
DE69432448T DE69432448T2 (en) 1993-02-01 1994-01-14 ULTRASONIC CATHETER SENSOR
JP51804094A JP3732854B2 (en) 1993-02-01 1994-01-14 Ultrasound catheter
EP94906070A EP0637937B1 (en) 1993-02-01 1994-01-14 Ultrasound catheter probe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/012,251 1993-02-01
US08/012,251 US5368037A (en) 1993-02-01 1993-02-01 Ultrasound catheter

Publications (2)

Publication Number Publication Date
WO1994017734A1 WO1994017734A1 (en) 1994-08-18
WO1994017734B1 true WO1994017734B1 (en) 1994-09-29

Family

ID=21754054

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/000474 WO1994017734A1 (en) 1993-02-01 1994-01-14 Ultrasound catheter

Country Status (7)

Country Link
US (1) US5368037A (en)
EP (3) EP1327417B1 (en)
JP (3) JP3732854B2 (en)
AT (3) ATE481034T1 (en)
CA (2) CA2235947C (en)
DE (3) DE69435314D1 (en)
WO (1) WO1994017734A1 (en)

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