EP0212352B1 - Ultraschallgenerator - Google Patents

Ultraschallgenerator Download PDF

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Publication number
EP0212352B1
EP0212352B1 EP86110398A EP86110398A EP0212352B1 EP 0212352 B1 EP0212352 B1 EP 0212352B1 EP 86110398 A EP86110398 A EP 86110398A EP 86110398 A EP86110398 A EP 86110398A EP 0212352 B1 EP0212352 B1 EP 0212352B1
Authority
EP
European Patent Office
Prior art keywords
ultrasonic generator
piezoelectric transducer
generator according
acoustic
lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86110398A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0212352A1 (de
Inventor
Arnim Dipl.-Ing. Rohwedder
Gerd Dr. Wessels
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0212352A1 publication Critical patent/EP0212352A1/de
Application granted granted Critical
Publication of EP0212352B1 publication Critical patent/EP0212352B1/de
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/30—Sound-focusing or directing, e.g. scanning using refraction, e.g. acoustic lenses

Definitions

  • the invention relates to an ultrasonic generator according to the first part of patent claim 1.
  • Such an ultrasound generator can be used, for example, to generate shock waves for the contactless destruction of concrements or for sonication of pathologically changed tissue in the human body.
  • Such an ultrasonic generator is known from US Pat. No. 3,387,604, in which the lens is acoustically coupled to the front of the piezoelectric transducer by a casting process and the damping body is adhesively coupled to the rear by gluing.
  • the front and back of the piezoelectric transducer are covered by a conductive coating, e.g. Silver lacquer, designed as electrodes.
  • the known ultrasonic generator can thus only be produced with great effort, since the transducer must first be provided with electrodes and then measures must be taken for its acoustic coupling to the lens and the damping body.
  • EP-A 0 018 614 shows a layer which is arranged directly on a piezoelectric transducer and which can consist of Pb or Al.
  • the invention has for its object to provide an ultrasonic generator of the type mentioned in such a way that the piezoelectric transducer can be provided with electrodes in a simple manner and acoustically coupled to the lens and the damping body.
  • the piezoelectric transducer can be designed very simply, e.g. by making it from a single sheet of piezoelectric material. Even in the case in which a plurality of plates of piezoelectric material arranged in one plane are used to construct the piezoelectric transducer, there is a simplification compared to the prior art, since all of the plates contact very easily by means of the layers of soft metal and on the lens and damping bodies are coupled.
  • Each plate can be formed by a single layer, but also by a plurality of layers of piezoelectric material lying one above the other, between which layers of a soft metal are arranged, each of which form individually contacted electrodes.
  • contacting and coupling of the transducer to the lens and damping body are very simple compared to the prior art. There is also an effective acoustic coupling of the layers of piezoelectric material to one another.
  • the acoustic lens can advantageously consist of a material whose acoustic impedance is greater than or equal to the geometric mean of the acoustic impedances of the material of the piezoelectric transducer and of water, it being assumed that the acoustic impedance of water is essentially that of the tissue to be sonicated corresponds.
  • the acoustic lens can consist of two parts, of which the first part has a fixed focus and is acoustically coupled to the piezoelectric transducer and the second part has a variable focus and is acoustically coupled to the radiation surface of the first part.
  • This training enables a focus shift and thus an optimal adjustment of the focus position to the respective circumstances, e.g. B. an adjustment to a kidney stone, possible.
  • the first part is expediently made of a material with a lower acoustic impedance than the piezoelectric transducer, for. B. made of magnesium or aluminum.
  • the second part can be formed by a liquid lens which is integrated in the first part and whose shape can be adapted to the desired focus position by the liquid pressure. Instead of a liquid lens, a solid-state lens can also be used. The focus can also be shifted by moving the solid-state lens or changing the temperature.
  • FIG. 1 shows a piezoelectric transducer 1 which forms a single oscillator and which forms a flat plate and is glued into a ring 2.
  • the electrical contacting of the piezoelectric transducer 1 is made by two lead plates 4, 5, which are pressed between the front of the piezoelectric transducer 1 and the first part 6 of an acoustic lens and the back of the piezoelectric transducer 1 and an acoustic damping body 7.
  • the lead plates 4, 5 also ensure the acoustic coupling of the first part 6 of the acoustic lens and the damping body 7 to the piezoelectric transducer 1.
  • the acoustic lens has a liquid lens 8 integrated in part 6, which can be made of magnesium, for example, which is formed by a membrane 9 and an acoustically favorable liquid 10.
  • the acoustic lens then has a sound impedance that is greater than or equal to the geometric mean of the sound impedances of the material of the piezoelectric transducer 1 and of water.
  • the volume of the rivers liquid lens 8 can be changed via a line 11. This changes the shape of the liquid lens 8 and the resulting focus can be adjusted according to the respective requirements.
  • the coupling of the ultrasound generator to the body to be treated can, for. B. over a further membrane 3.
  • the space between the membranes 9 and 3 is thereby by a coupling medium 13, z. B. water filled.
  • the components 6, 9, 11 are held by a steel ring 14.
  • a steel plate 15 serves as a counter plate.
  • An insulating plate 16 is arranged between the acoustic damping body 7 and the steel plate 15.
  • a number of such plates of piezoelectric material arranged in one plane can also be used as the piezoelectric transducer.
  • the piezoelectric transducer is formed by several layers 17, 18, 19 made of piezoelectric material, which are covered by lead layers 20, 21, 22, 23, which serve as electrodes and for acoustic coupling.
  • thicknesses in the order of magnitude greater than 1 mm and diameters greater than 10 mm are suitable for use as high-intensity ultrasound generators for the irradiation of pathological changes. It is essential that the diameter is larger than the thickness.
  • Lead zirconate titanate can be used as the active material.
  • FIG. 1 shows in dashed lines an embodiment with three plates 1a, 1b, 1 which together form the piezoelectric transducer and which can be used instead of a single plate.
  • the lead plates 4 and 5 cover all plates 1 a, 1 b and 1 c.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP86110398A 1985-08-09 1986-07-28 Ultraschallgenerator Expired EP0212352B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3528676 1985-08-09
DE3528676 1985-08-09

Publications (2)

Publication Number Publication Date
EP0212352A1 EP0212352A1 (de) 1987-03-04
EP0212352B1 true EP0212352B1 (de) 1989-09-27

Family

ID=6278164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110398A Expired EP0212352B1 (de) 1985-08-09 1986-07-28 Ultraschallgenerator

Country Status (4)

Country Link
US (1) US4718421A (enrdf_load_stackoverflow)
EP (1) EP0212352B1 (enrdf_load_stackoverflow)
JP (1) JPS62164011U (enrdf_load_stackoverflow)
DE (1) DE3665949D1 (enrdf_load_stackoverflow)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8529446D0 (en) * 1985-11-29 1986-01-08 Univ Aberdeen Divergent ultrasound arrays
DE3627222A1 (de) * 1986-08-11 1988-02-18 Siemens Ag Ultraschall-taschenzerstaeubergeraet
FR2614722B1 (fr) * 1987-04-28 1992-04-17 Dory Jacques Filtre acoustique permettant de supprimer ou d'attenuer les alternances negatives d'une onde elastique et generateur d'ondes elastiques comportant un tel filtre
WO1989000026A1 (en) * 1987-06-30 1989-01-12 Yokogawa Medical Systems, Ltd. Ultrasonic diagnostic apparatus
DE8710118U1 (de) * 1987-07-23 1988-11-17 Siemens AG, 1000 Berlin und 8000 München Stoßwellengenerator für eine Einrichtung zum berührungslosen Zertrümmern von Konkrementen im Körper eines Lebewesens
DE3739393C2 (de) * 1987-11-20 1996-07-18 Siemens Ag Lithotripter mit verstellbarer Fokussierung
DE3743822A1 (de) * 1987-12-23 1989-07-13 Dornier Medizintechnik Elektromagnetische stosswellenquelle
DE3803275A1 (de) * 1988-02-04 1989-08-17 Dornier Medizintechnik Piezoelektrische stosswellenquelle
US5065761A (en) * 1989-07-12 1991-11-19 Diasonics, Inc. Lithotripsy system
US4945898A (en) * 1989-07-12 1990-08-07 Diasonics, Inc. Power supply
DE4117638A1 (de) * 1990-05-30 1991-12-05 Toshiba Kawasaki Kk Stosswellengenerator mit einem piezoelektrischen element
US5125397A (en) * 1990-08-22 1992-06-30 Christopher Nowacki Lithotripter cushion
DE4037160A1 (de) * 1990-11-22 1992-05-27 Dornier Medizintechnik Akustische fokussiereinrichtung
US5127410A (en) * 1990-12-06 1992-07-07 Hewlett-Packard Company Ultrasound probe and lens assembly for use therein
DE4136004C1 (enrdf_load_stackoverflow) * 1991-10-31 1993-01-28 Siemens Ag, 8000 Muenchen, De
DE4229630C2 (de) * 1992-09-04 1994-06-16 Siemens Ag Akustische Linse
US5465724A (en) * 1993-05-28 1995-11-14 Acuson Corporation Compact rotationally steerable ultrasound transducer
US5798599A (en) * 1996-10-24 1998-08-25 Dukane Corporation Ultrasonic transducer assembly using crush foils
WO2001072373A2 (en) * 2000-03-24 2001-10-04 Transurgical, Inc. Apparatus and method for intrabody thermal treatment
US6524246B1 (en) * 2000-10-13 2003-02-25 Sonocine, Inc. Ultrasonic cellular tissue screening tool
DE10158519B4 (de) * 2001-11-29 2005-01-13 Dornier Medtech Holding International Gmbh Stoß- und Druckwellen-Therapiegerät
DE10215416B4 (de) * 2002-04-08 2020-10-29 Ferton Holding S.A. Medizinisches Gerät zur Behandlung von biologischem Gewebe
US20030199857A1 (en) * 2002-04-17 2003-10-23 Dornier Medtech Systems Gmbh Apparatus and method for manipulating acoustic pulses
DE10234144A1 (de) * 2002-07-26 2004-02-05 Dornier Medtech Gmbh Lithotripter
US20060034943A1 (en) * 2003-10-31 2006-02-16 Technology Innovations Llc Process for treating a biological organism
US20070149496A1 (en) * 2003-10-31 2007-06-28 Jack Tuszynski Water-soluble compound
US20050249667A1 (en) * 2004-03-24 2005-11-10 Tuszynski Jack A Process for treating a biological organism
CN1965348B (zh) * 2004-06-07 2010-09-01 皇家飞利浦电子股份有限公司 可变焦距的声学设备
WO2006042144A2 (en) * 2004-10-07 2006-04-20 Ultra-Scan Corporation Ultrasonic fingerprint scanning utilizing a plane wave
US7674256B2 (en) * 2005-03-17 2010-03-09 Boston Scientific Scimed, Inc. Treating internal body tissue
DE102005037043C5 (de) * 2005-08-05 2017-12-14 Dornier Medtech Systems Gmbh Stoßwellentherapiegerät mit Bildgewinnung
JP5243427B2 (ja) * 2006-08-23 2013-07-24 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 超音波及び／又は光を可変に屈折させるシステム
US7888847B2 (en) * 2006-10-24 2011-02-15 Dennis Raymond Dietz Apodizing ultrasonic lens
US8292835B1 (en) * 2009-05-01 2012-10-23 Body Beam Research Inc. Non-invasive ultrasonic soft-tissue treatment method
RU2451933C1 (ru) * 2011-01-21 2012-05-27 Владимир Яковлевич Грошев Способ демпфирования пьезоэлектрических излучателей и устройство для его осуществления
US10656298B2 (en) * 2016-07-11 2020-05-19 Baker Hughes, A Ge Company, Llc Ultrasonic beam focus adjustment for single-transducer ultrasonic assembly tools
US20180280231A1 (en) * 2017-03-31 2018-10-04 Lite-Med Inc. Invasive shock wave applicator for applying shock waves sideways
US10658912B2 (en) * 2017-03-31 2020-05-19 Lite-Med Inc. Shock wave generating unit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525873A (en) * 1948-07-23 1950-10-17 Sperry Prod Inc Lens system for ultrasonic viewing of defects in objects
US2592222A (en) * 1949-04-27 1952-04-08 Sperry Prod Inc Lens system for ultrasonic viewing of defects in objects
US3387604A (en) * 1965-02-23 1968-06-11 Magnaflux Corp Focused contact transducer
FR1593791A (enrdf_load_stackoverflow) * 1967-11-29 1970-06-01
US4084582A (en) * 1976-03-11 1978-04-18 New York Institute Of Technology Ultrasonic imaging system
US4383194A (en) * 1979-05-01 1983-05-10 Toray Industries, Inc. Electro-acoustic transducer element
FR2477723A1 (fr) * 1980-03-07 1981-09-11 Cgr Ultrasonic Sonde d'echographie ultrasonore a lentille acoustique et echographe comportant une telle sonde
DE3309236A1 (de) * 1983-03-15 1984-09-20 Siemens AG, 1000 Berlin und 8000 München Ultraschallwandler
DE3319871A1 (de) * 1983-06-01 1984-12-06 Richard Wolf Gmbh, 7134 Knittlingen Piezoelektrischer wandler zur zerstoerung von konkrementen im koerperinnern
GB8333696D0 (en) * 1983-12-17 1984-01-25 Glasshome Ltd Transistor amplifier

Also Published As

Publication number Publication date
DE3665949D1 (en) 1989-11-02
US4718421A (en) 1988-01-12
JPS62164011U (enrdf_load_stackoverflow) 1987-10-19
EP0212352A1 (de) 1987-03-04

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