EP0308644A3 - Focusing ultrasonic transducer - Google Patents
Focusing ultrasonic transducer Download PDFInfo
- Publication number
- EP0308644A3 EP0308644A3 EP88113188A EP88113188A EP0308644A3 EP 0308644 A3 EP0308644 A3 EP 0308644A3 EP 88113188 A EP88113188 A EP 88113188A EP 88113188 A EP88113188 A EP 88113188A EP 0308644 A3 EP0308644 A3 EP 0308644A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- ultrasonic transducer
- focusing ultrasonic
- focusing
- transducer
- ultrasonic
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
- B06B1/0625—Annular array
-
- 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
- G10K11/32—Sound-focusing or directing, e.g. scanning characterised by the shape of the source
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Surgical Instruments (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873732131 DE3732131A1 (en) | 1987-09-24 | 1987-09-24 | FOCUSING ULTRASONIC transducer |
DE3732131 | 1987-09-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0308644A2 EP0308644A2 (en) | 1989-03-29 |
EP0308644A3 true EP0308644A3 (en) | 1990-05-30 |
EP0308644B1 EP0308644B1 (en) | 1994-10-26 |
Family
ID=6336744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88113188A Expired - Lifetime EP0308644B1 (en) | 1987-09-24 | 1988-08-13 | Focusing ultrasonic transducer |
Country Status (3)
Country | Link |
---|---|
US (1) | US4888746A (en) |
EP (1) | EP0308644B1 (en) |
DE (2) | DE3732131A1 (en) |
Families Citing this family (86)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01195844A (en) * | 1988-01-29 | 1989-08-07 | Yokogawa Medical Syst Ltd | Ultrasonic wave receiving phasing circuit |
JPH02215452A (en) * | 1989-02-17 | 1990-08-28 | Toshiba Corp | Calculus crushing device |
DE8912723U1 (en) * | 1989-10-27 | 1989-12-28 | Dornier Medizintechnik GmbH, 8000 München | Lithotripter |
DE3940808A1 (en) * | 1989-12-09 | 1991-06-20 | Dornier Medizintechnik | Surgical ultrasonic piezoelectric transducer array - uses array of ultrasonic generators to enable independent excitation of beam focused at kidney stone |
JPH03280939A (en) * | 1990-03-29 | 1991-12-11 | Fujitsu Ltd | Ultrasonic probe |
DE4011017C1 (en) * | 1990-04-05 | 1991-10-02 | Dornier Medizintechnik Gmbh, 8000 Muenchen, De | |
DE4102551A1 (en) * | 1991-01-29 | 1992-07-02 | Wolf Gmbh Richard | METHOD FOR DETERMINING THE ACOUSTIC PERFORMANCE OF FOCUSING ELECTRO-ACOUSTIC TRANSDUCERS AND DEVICE FOR IMPLEMENTING THE METHOD |
US5316000A (en) * | 1991-03-05 | 1994-05-31 | Technomed International (Societe Anonyme) | Use of at least one composite piezoelectric transducer in the manufacture of an ultrasonic therapy apparatus for applying therapy, in a body zone, in particular to concretions, to tissue, or to bones, of a living being and method of ultrasonic therapy |
GB9408668D0 (en) * | 1994-04-30 | 1994-06-22 | Orthosonics Ltd | Untrasonic therapeutic system |
US5582578A (en) * | 1995-08-01 | 1996-12-10 | Duke University | Method for the comminution of concretions |
US5800365A (en) * | 1995-12-14 | 1998-09-01 | Duke University | Microsecond tandem-pulse electrohydraulic shock wave generator with confocal reflectors |
US6128958A (en) * | 1997-09-11 | 2000-10-10 | The Regents Of The University Of Michigan | Phased array system architecture |
US6237419B1 (en) * | 1999-08-16 | 2001-05-29 | General Electric Company | Aspherical curved element transducer to inspect a part with curved entry surface |
JP2003512103A (en) * | 1999-10-18 | 2003-04-02 | フォーカス サージェリー,インコーポレイテッド | Split beam converter |
US6613004B1 (en) * | 2000-04-21 | 2003-09-02 | Insightec-Txsonics, Ltd. | Systems and methods for creating longer necrosed volumes using a phased array focused ultrasound system |
US6419648B1 (en) | 2000-04-21 | 2002-07-16 | Insightec-Txsonics Ltd. | Systems and methods for reducing secondary hot spots in a phased array focused ultrasound system |
EP1353723A2 (en) | 2000-11-17 | 2003-10-22 | Gendel Limited | Ablation of cells using combined electric field and ultrasound therapy |
US6821274B2 (en) | 2001-03-07 | 2004-11-23 | Gendel Ltd. | Ultrasound therapy for selective cell ablation |
US6618620B1 (en) | 2000-11-28 | 2003-09-09 | Txsonics Ltd. | Apparatus for controlling thermal dosing in an thermal treatment system |
US6626854B2 (en) | 2000-12-27 | 2003-09-30 | Insightec - Txsonics Ltd. | Systems and methods for ultrasound assisted lipolysis |
US6645162B2 (en) | 2000-12-27 | 2003-11-11 | Insightec - Txsonics Ltd. | Systems and methods for ultrasound assisted lipolysis |
WO2002063606A1 (en) * | 2001-02-09 | 2002-08-15 | Koninklijke Philips Electronics N.V. | Ultrasound transducer and method of manufacturing an ultrasound transducer |
US20050043726A1 (en) * | 2001-03-07 | 2005-02-24 | Mchale Anthony Patrick | Device II |
EP1450697A4 (en) | 2001-11-09 | 2009-09-09 | Univ Duke | Method and apparatus to reduce tissue injury in shock wave lithotripsy |
US7894877B2 (en) * | 2002-05-17 | 2011-02-22 | Case Western Reserve University | System and method for adjusting image parameters based on device tracking |
US8088067B2 (en) | 2002-12-23 | 2012-01-03 | Insightec Ltd. | Tissue aberration corrections in ultrasound therapy |
US7087023B2 (en) * | 2003-02-14 | 2006-08-08 | Sensant Corporation | Microfabricated ultrasonic transducers with bias polarity beam profile control and method of operating the same |
US7635332B2 (en) * | 2003-02-14 | 2009-12-22 | Siemens Medical Solutions Usa, Inc. | System and method of operating microfabricated ultrasonic transducers for harmonic imaging |
US7618373B2 (en) * | 2003-02-14 | 2009-11-17 | Siemens Medical Solutions Usa, Inc. | Microfabricated ultrasonic transducer array for 3-D imaging and method of operating the same |
US7780597B2 (en) * | 2003-02-14 | 2010-08-24 | Siemens Medical Solutions Usa, Inc. | Method and apparatus for improving the performance of capacitive acoustic transducers using bias polarity control and multiple firings |
US7611462B2 (en) | 2003-05-22 | 2009-11-03 | Insightec-Image Guided Treatment Ltd. | Acoustic beam forming in phased arrays including large numbers of transducer elements |
US7850613B2 (en) * | 2003-05-30 | 2010-12-14 | Orison Corporation | Apparatus and method for three dimensional ultrasound breast imaging |
WO2005018469A1 (en) | 2003-08-14 | 2005-03-03 | Duke University | Apparatus for improved shock-wave lithotripsy (swl) using a piezoelectric annular array (peaa) shock-wave generator in combination with a primary shock wave |
US20050038361A1 (en) * | 2003-08-14 | 2005-02-17 | Duke University | Apparatus for improved shock-wave lithotripsy (SWL) using a piezoelectric annular array (PEAA) shock-wave generator in combination with a primary shock wave source |
US8409099B2 (en) | 2004-08-26 | 2013-04-02 | Insightec Ltd. | Focused ultrasound system for surrounding a body tissue mass and treatment method |
EP1819277A4 (en) * | 2004-11-12 | 2010-05-05 | Ltd Kpe | Nanoparticle mediated ultrasound therapy and diagnostic imaging |
US20070016039A1 (en) | 2005-06-21 | 2007-01-18 | Insightec-Image Guided Treatment Ltd. | Controlled, non-linear focused ultrasound treatment |
US8057408B2 (en) | 2005-09-22 | 2011-11-15 | The Regents Of The University Of Michigan | Pulsed cavitational ultrasound therapy |
US10219815B2 (en) | 2005-09-22 | 2019-03-05 | The Regents Of The University Of Michigan | Histotripsy for thrombolysis |
US8608672B2 (en) | 2005-11-23 | 2013-12-17 | Insightec Ltd. | Hierarchical switching in ultra-high density ultrasound array |
US8235901B2 (en) | 2006-04-26 | 2012-08-07 | Insightec, Ltd. | Focused ultrasound system with far field tail suppression |
US7942809B2 (en) * | 2006-05-26 | 2011-05-17 | Leban Stanley G | Flexible ultrasonic wire in an endoscope delivery system |
FR2903316B1 (en) * | 2006-07-05 | 2009-06-26 | Edap S A | THERAPY PROBE AND THERAPY APPARATUS INCLUDING SUCH A PROBE |
FR2903315B1 (en) * | 2006-07-05 | 2016-03-11 | Edap S A | METHOD AND APPARATUS FOR SEQUENTIALLY ACTIVE ULTRASOUND EMITTER THERAPY |
US7955281B2 (en) * | 2006-09-07 | 2011-06-07 | Nivasonix, Llc | External ultrasound lipoplasty |
US8262591B2 (en) * | 2006-09-07 | 2012-09-11 | Nivasonix, Llc | External ultrasound lipoplasty |
CN101715320B (en) * | 2007-01-10 | 2012-01-25 | 周宇峰 | A shock wave lithotripter system |
US8323201B2 (en) | 2007-08-06 | 2012-12-04 | Orison Corporation | System and method for three-dimensional ultrasound imaging |
US8251908B2 (en) | 2007-10-01 | 2012-08-28 | Insightec Ltd. | Motion compensated image-guided focused ultrasound therapy system |
US8425424B2 (en) | 2008-11-19 | 2013-04-23 | Inightee Ltd. | Closed-loop clot lysis |
US8617073B2 (en) | 2009-04-17 | 2013-12-31 | Insightec Ltd. | Focusing ultrasound into the brain through the skull by utilizing both longitudinal and shear waves |
US9623266B2 (en) | 2009-08-04 | 2017-04-18 | Insightec Ltd. | Estimation of alignment parameters in magnetic-resonance-guided ultrasound focusing |
JP5850837B2 (en) | 2009-08-17 | 2016-02-03 | ヒストソニックス,インコーポレーテッド | Disposable acoustic coupling media container |
US9289154B2 (en) | 2009-08-19 | 2016-03-22 | Insightec Ltd. | Techniques for temperature measurement and corrections in long-term magnetic resonance thermometry |
CA2770706C (en) | 2009-08-26 | 2017-06-20 | Charles A. Cain | Devices and methods for using controlled bubble cloud cavitation in fractionating urinary stones |
US9177543B2 (en) | 2009-08-26 | 2015-11-03 | Insightec Ltd. | Asymmetric ultrasound phased-array transducer for dynamic beam steering to ablate tissues in MRI |
US9943708B2 (en) | 2009-08-26 | 2018-04-17 | Histosonics, Inc. | Automated control of micromanipulator arm for histotripsy prostate therapy while imaging via ultrasound transducers in real time |
US8539813B2 (en) | 2009-09-22 | 2013-09-24 | The Regents Of The University Of Michigan | Gel phantoms for testing cavitational ultrasound (histotripsy) transducers |
WO2011045669A2 (en) | 2009-10-14 | 2011-04-21 | Insightec Ltd. | Mapping ultrasound transducers |
US8368401B2 (en) | 2009-11-10 | 2013-02-05 | Insightec Ltd. | Techniques for correcting measurement artifacts in magnetic resonance thermometry |
US9852727B2 (en) | 2010-04-28 | 2017-12-26 | Insightec, Ltd. | Multi-segment ultrasound transducers |
US8932237B2 (en) | 2010-04-28 | 2015-01-13 | Insightec, Ltd. | Efficient ultrasound focusing |
WO2011156624A2 (en) * | 2010-06-09 | 2011-12-15 | Regents Of The University Of Minnesota | Dual mode ultrasound transducer (dmut) system and method for controlling delivery of ultrasound therapy |
US9981148B2 (en) | 2010-10-22 | 2018-05-29 | Insightec, Ltd. | Adaptive active cooling during focused ultrasound treatment |
CN102579127B (en) * | 2011-01-14 | 2014-09-03 | 深圳市普罗惠仁医学科技有限公司 | Ultrasonic focusing energy transducer |
FR2973550B1 (en) | 2011-03-30 | 2015-12-04 | Edap Tms France | METHOD AND APPARATUS FOR GENERATING FOCUSED ULTRASONIC WAVE WITH SURFACE MODULATION |
US9144694B2 (en) | 2011-08-10 | 2015-09-29 | The Regents Of The University Of Michigan | Lesion generation through bone using histotripsy therapy without aberration correction |
US8939909B2 (en) | 2011-10-28 | 2015-01-27 | Decision Sciences International Corporation | Spread spectrum coded waveforms in ultrasound imaging |
US9049783B2 (en) | 2012-04-13 | 2015-06-02 | Histosonics, Inc. | Systems and methods for obtaining large creepage isolation on printed circuit boards |
EP2844343B1 (en) | 2012-04-30 | 2018-11-21 | The Regents Of The University Of Michigan | Ultrasound transducer manufacturing using rapid-prototyping method |
US20140100459A1 (en) | 2012-10-05 | 2014-04-10 | The Regents Of The University Of Michigan | Bubble-induced color doppler feedback during histotripsy |
EP3016594B1 (en) | 2013-07-03 | 2023-01-25 | Histosonics, Inc. | Histotripsy excitation sequences optimized for bubble cloud formation using shock scattering |
US11432900B2 (en) | 2013-07-03 | 2022-09-06 | Histosonics, Inc. | Articulating arm limiter for cavitational ultrasound therapy system |
US10780298B2 (en) | 2013-08-22 | 2020-09-22 | The Regents Of The University Of Michigan | Histotripsy using very short monopolar ultrasound pulses |
US9844359B2 (en) | 2013-09-13 | 2017-12-19 | Decision Sciences Medical Company, LLC | Coherent spread-spectrum coded waveforms in synthetic aperture image formation |
EP3154438B1 (en) | 2014-06-13 | 2022-07-27 | University of Utah Research Foundation | Therapeutic ultrasound breast treatment |
EP3172289A1 (en) | 2014-07-23 | 2017-05-31 | Dow Global Technologies LLC | Structural adhesives having improved wash-off resistance and method for dispensing same |
KR20180096493A (en) | 2015-02-25 | 2018-08-29 | 디시전 사이선씨즈 메디컬 컴패니, 엘엘씨 | Acoustic signal transmission contact medium and coupling medium |
CN108348772B (en) | 2015-06-24 | 2020-03-03 | 美国密歇根州立大学试剂中心 | Histotripsy therapy system and method for treating brain tissue |
EP3359048B1 (en) | 2015-10-08 | 2023-07-19 | Decision Sciences Medical Company, LLC | Acoustic orthopedic tracking system and methods |
RU2697566C2 (en) * | 2017-12-28 | 2019-08-15 | Общество с ограниченной ответственностью "ГидроМаринн" | Electroacoustic transducer for parametric generation of ultrasound |
CA3120586A1 (en) | 2018-11-28 | 2020-06-04 | Histosonics, Inc. | Histotripsy systems and methods |
CN113613905A (en) | 2019-03-06 | 2021-11-05 | 决策科学医疗有限责任公司 | Method for manufacturing and distributing semi-rigid acoustically coupled articles and packaging for ultrasonic imaging |
US11154274B2 (en) | 2019-04-23 | 2021-10-26 | Decision Sciences Medical Company, LLC | Semi-rigid acoustic coupling articles for ultrasound diagnostic and treatment applications |
EP4096782A4 (en) | 2020-01-28 | 2024-02-14 | The Regents Of The University Of Michigan | Systems and methods for histotripsy immunosensitization |
JP2023549818A (en) | 2020-11-13 | 2023-11-29 | ディスィジョン サイエンシズ メディカル カンパニー,エルエルシー | System and method for synthetic aperture ultrasound imaging of objects |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2369768A1 (en) * | 1976-11-01 | 1978-05-26 | Stanford Research Inst | ULTRASONIC TRANSDUCER WITH VARIABLE FOCAL DISTANCE |
DE3119295A1 (en) * | 1981-05-14 | 1982-12-16 | Siemens AG, 1000 Berlin und 8000 München | DEVICE FOR DESTROYING CONCRETE IN BODIES |
FR2567394A1 (en) * | 1984-07-14 | 1986-01-17 | Wolf Gmbh Richard | PIEZOELECTRIC TRANSDUCER FOR THE DESTRUCTION OF CONCRETIONS WITHIN THE BODY |
EP0289382A1 (en) * | 1987-04-28 | 1988-11-02 | Edap International | Generator for elastic pulses with a predetermined desired shape, and its use in medical treatment or diagnosis |
EP0307300A1 (en) * | 1987-09-07 | 1989-03-15 | Technomed International S.A. | Piezoelectric device using waves with a reduced negative polarity, and its use in extra-corporal lithotripsy, or in the destruction of particular tissues |
Family Cites Families (28)
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---|---|---|---|---|
US2645727A (en) * | 1948-03-26 | 1953-07-14 | Bell Telephone Labor Inc | Focusing ultrasonic radiator |
FR2252580B1 (en) * | 1973-11-22 | 1980-02-22 | Realisations Ultrasoniques Sa | |
FR2292978A1 (en) * | 1974-11-28 | 1976-06-25 | Anvar | IMPROVEMENTS TO ULTRA-SOUND SURVEYING DEVICES |
US4183249A (en) * | 1975-03-07 | 1980-01-15 | Varian Associates, Inc. | Lens system for acoustical imaging |
FR2332531A1 (en) * | 1975-11-24 | 1977-06-17 | Commissariat Energie Atomique | ULTRA-SOUND CAMERA |
FR2334953A1 (en) * | 1975-12-11 | 1977-07-08 | Labo Electronique Physique | ULTRASONIC ANALYSIS SYSTEM AND ITS APPLICATION TO ECHOGRAPHY |
US4159462A (en) * | 1977-08-18 | 1979-06-26 | General Electric Company | Ultrasonic multi-sector scanner |
FR2410469A1 (en) * | 1977-12-05 | 1979-06-29 | Labo Electronique Physique | ULTRASONIC ELECTRONIC SYSTEM FOR DETERMINING PRIVILEGED DIRECTIONS IN BIOLOGICAL STRUCTURES |
CA1153097A (en) * | 1978-03-03 | 1983-08-30 | Jack Jellins | Rotating ultrasonic scanner |
US4156863A (en) * | 1978-04-28 | 1979-05-29 | The United States Of America As Represented By The Secretary Of The Navy | Conical beam transducer array |
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US4241611A (en) * | 1979-03-02 | 1980-12-30 | Smith Kline Instruments, Inc. | Ultrasonic diagnostic transducer assembly and system |
US4307613A (en) * | 1979-06-14 | 1981-12-29 | University Of Connecticut | Electronically focused ultrasonic transmitter |
US4281550A (en) * | 1979-12-17 | 1981-08-04 | North American Philips Corporation | Curved array of sequenced ultrasound transducers |
JPS56121541A (en) * | 1980-02-28 | 1981-09-24 | Tokyo Shibaura Electric Co | Ultrasonic imaging apparatus |
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JPS58157454A (en) * | 1982-03-15 | 1983-09-19 | 株式会社東芝 | Ultrasonic diagnostic apparatus |
EP0090567B1 (en) * | 1982-03-20 | 1988-07-27 | Fujitsu Limited | Ultrasonic sector-scan probe |
JPS58216294A (en) * | 1982-06-10 | 1983-12-15 | 松下電器産業株式会社 | Acoustic lens |
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US4471785A (en) * | 1982-09-29 | 1984-09-18 | Sri International | Ultrasonic imaging system with correction for velocity inhomogeneity and multipath interference using an ultrasonic imaging array |
US4537074A (en) * | 1983-09-12 | 1985-08-27 | Technicare Corporation | Annular array ultrasonic transducers |
FR2556582B1 (en) * | 1983-12-14 | 1986-12-19 | Dory Jacques | ULTRASONIC PULSE APPARATUS FOR DESTROYING CALCULATIONS |
US4582065A (en) * | 1984-06-28 | 1986-04-15 | Picker International, Inc. | Ultrasonic step scanning utilizing unequally spaced curvilinear transducer array |
DE3543867C3 (en) * | 1985-12-12 | 1994-10-06 | Wolf Gmbh Richard | Device for the spatial location and destruction of concrements in body cavities |
DE3669203D1 (en) * | 1985-12-20 | 1990-04-05 | Siemens Ag | METHOD FOR CONTROLLING THE PROPERTIES OF THE FOCUS OF AN ULTRASONIC FIELD AND DEVICE FOR IMPLEMENTING THE METHOD. |
US4787394A (en) * | 1986-04-24 | 1988-11-29 | Kabushiki Kaisha Toshiba | Ultrasound therapy apparatus |
-
1987
- 1987-09-24 DE DE19873732131 patent/DE3732131A1/en not_active Withdrawn
-
1988
- 1988-08-13 DE DE3851930T patent/DE3851930D1/en not_active Expired - Fee Related
- 1988-08-13 EP EP88113188A patent/EP0308644B1/en not_active Expired - Lifetime
- 1988-09-14 US US07/244,714 patent/US4888746A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2369768A1 (en) * | 1976-11-01 | 1978-05-26 | Stanford Research Inst | ULTRASONIC TRANSDUCER WITH VARIABLE FOCAL DISTANCE |
DE3119295A1 (en) * | 1981-05-14 | 1982-12-16 | Siemens AG, 1000 Berlin und 8000 München | DEVICE FOR DESTROYING CONCRETE IN BODIES |
FR2567394A1 (en) * | 1984-07-14 | 1986-01-17 | Wolf Gmbh Richard | PIEZOELECTRIC TRANSDUCER FOR THE DESTRUCTION OF CONCRETIONS WITHIN THE BODY |
EP0289382A1 (en) * | 1987-04-28 | 1988-11-02 | Edap International | Generator for elastic pulses with a predetermined desired shape, and its use in medical treatment or diagnosis |
EP0307300A1 (en) * | 1987-09-07 | 1989-03-15 | Technomed International S.A. | Piezoelectric device using waves with a reduced negative polarity, and its use in extra-corporal lithotripsy, or in the destruction of particular tissues |
Also Published As
Publication number | Publication date |
---|---|
EP0308644A2 (en) | 1989-03-29 |
DE3851930D1 (en) | 1994-12-01 |
EP0308644B1 (en) | 1994-10-26 |
DE3732131A1 (en) | 1989-04-06 |
US4888746A (en) | 1989-12-19 |
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