DE2619231C2 - Verfahren und Vorrichtung zur Ultraschallprüfung - Google Patents
Verfahren und Vorrichtung zur UltraschallprüfungInfo
- Publication number
- DE2619231C2 DE2619231C2 DE2619231A DE2619231A DE2619231C2 DE 2619231 C2 DE2619231 C2 DE 2619231C2 DE 2619231 A DE2619231 A DE 2619231A DE 2619231 A DE2619231 A DE 2619231A DE 2619231 C2 DE2619231 C2 DE 2619231C2
- Authority
- DE
- Germany
- Prior art keywords
- transducer
- arm
- transducers
- ultrasonic
- patient
- 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
Links
- 238000012360 testing method Methods 0.000 title claims description 28
- 238000000034 method Methods 0.000 title description 25
- 238000010168 coupling process Methods 0.000 claims description 38
- 230000008878 coupling Effects 0.000 claims description 37
- 238000005859 coupling reaction Methods 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims 3
- 230000033001 locomotion Effects 0.000 description 39
- 238000002592 echocardiography Methods 0.000 description 15
- 239000012528 membrane Substances 0.000 description 15
- 238000002604 ultrasonography Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 8
- 230000004913 activation Effects 0.000 description 7
- 238000001994 activation Methods 0.000 description 7
- 230000010355 oscillation Effects 0.000 description 7
- 210000001519 tissue Anatomy 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000011835 investigation Methods 0.000 description 4
- 210000000617 arm Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000010358 mechanical oscillation Effects 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 210000001015 abdomen Anatomy 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003534 oscillatory effect Effects 0.000 description 2
- 230000035935 pregnancy Effects 0.000 description 2
- 241001605695 Pareronia Species 0.000 description 1
- OIRDTQYFTABQOQ-UHTZMRCNSA-N Vidarabine Chemical class C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](CO)[C@@H](O)[C@@H]1O OIRDTQYFTABQOQ-UHTZMRCNSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000003754 fetus Anatomy 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002594 fluoroscopy Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- 210000004291 uterus Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/262—Arrangements for orientation or scanning by relative movement of the head and the sensor by electronic orientation or focusing, e.g. with phased arrays
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Clinical applications
- A61B8/0825—Clinical applications for diagnosis of the breast, e.g. mammography
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/40—Positioning of patients, e.g. means for holding or immobilising parts of the patient's body
- A61B8/406—Positioning of patients, e.g. means for holding or immobilising parts of the patient's body using means for diagnosing suspended breasts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/42—Details of probe positioning or probe attachment to the patient
- A61B8/4209—Details of probe positioning or probe attachment to the patient by using holders, e.g. positioning frames
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0609—Display arrangements, e.g. colour displays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/223—Supports, positioning or alignment in fixed situation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S128/00—Surgery
- Y10S128/915—Ultrasound mammography
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Radiology & Medical Imaging (AREA)
- Engineering & Computer Science (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Medical Informatics (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Acoustics & Sound (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU144375 | 1975-05-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2619231A1 DE2619231A1 (de) | 1976-11-11 |
| DE2619231C2 true DE2619231C2 (de) | 1986-09-18 |
Family
ID=3691973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2619231A Expired DE2619231C2 (de) | 1975-05-01 | 1976-04-30 | Verfahren und Vorrichtung zur Ultraschallprüfung |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4094306A (OSRAM) |
| JP (1) | JPS5930423B2 (OSRAM) |
| AT (1) | AT361605B (OSRAM) |
| CA (1) | CA1076244A (OSRAM) |
| DE (1) | DE2619231C2 (OSRAM) |
| FR (1) | FR2309865A1 (OSRAM) |
| GB (2) | GB1543740A (OSRAM) |
Families Citing this family (56)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3973126A (en) * | 1975-07-31 | 1976-08-03 | General Electric Company | Mammography |
| US3963933A (en) * | 1975-08-18 | 1976-06-15 | General Electric Company | Mammography fixture |
| FR2353270A1 (fr) * | 1976-06-03 | 1977-12-30 | Cgr Ultrasonic | Appareil d'echographie destine au diagnostic medical, utilisant une sonde a elements multiples |
| JPS5316481A (en) * | 1976-07-30 | 1978-02-15 | Tokyo Shibaura Electric Co | Ultrasonic diagnostic device |
| US4391281A (en) * | 1977-01-06 | 1983-07-05 | Sri International | Ultrasonic transducer system and method |
| JPS6054060B2 (ja) * | 1977-03-30 | 1985-11-28 | 株式会社東芝 | 超音波診断装置 |
| US4241608A (en) * | 1978-01-24 | 1980-12-30 | Unirad Corporation | Ultrasonic scanner |
| US4248090A (en) * | 1978-03-27 | 1981-02-03 | New York Institute Of Technology | Apparatus for ultrasonically imaging a body |
| JPS54150881A (en) * | 1978-05-19 | 1979-11-27 | Tokyo Shibaura Electric Co | Ultrasoniccwave diagnosis device |
| US4233988A (en) * | 1978-07-05 | 1980-11-18 | Life Instruments Corporation | High resolution rotating head ultrasonic scanner |
| US4231373A (en) * | 1978-07-18 | 1980-11-04 | Diasonics | Ultrasonic imaging apparatus |
| DE2911258C2 (de) * | 1979-03-22 | 1982-09-23 | Chmiel, Horst, Prof. Dr.-Ing., 7250 Leonberg | Vorrichtung zum noninvasiven Messen der Blutströmungsgeschwindigkeit nach der Ultraschall-Doppler-Effekt-Methode |
| US4232555A (en) * | 1979-04-18 | 1980-11-11 | Eastman Kodak Company | Ultrasonographic exposure apparatus |
| US4311147A (en) * | 1979-05-26 | 1982-01-19 | Richard Wolf Gmbh | Apparatus for contact-free disintegration of kidney stones or other calculi |
| US4216766A (en) * | 1979-09-07 | 1980-08-12 | The United States Of America As Represented By The Secretary Of The Navy | Treatment of body tissue by means of internal cavity resonance |
| DE3008975A1 (de) * | 1980-03-08 | 1981-10-01 | Koch & Sterzel Gmbh & Co, 4300 Essen | Vorrichtung zur herstellung einer transversalschichtabbildung mittels ultraschall |
| DE3033598A1 (de) * | 1980-09-06 | 1982-04-15 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren zur ultraschalltherapie |
| DE3038052A1 (de) * | 1980-10-08 | 1982-05-06 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zum abtasten eines objekts zu dessen abbildung mittels ultraschall-echo-tomographie |
| DE3152827A1 (de) * | 1981-05-06 | 1983-07-07 | Orvosi Mueszer Szoevetkezet | Automatische dosierungsbemessung und steuerschaltungsanordnung |
| US4424813A (en) | 1981-08-14 | 1984-01-10 | Diasonics, Inc. | Multi-mode ultrasound scanner |
| US4476873A (en) * | 1982-09-03 | 1984-10-16 | Medtronic, Inc. | Ultrasound scanning system for skeletal imaging |
| US4437468A (en) | 1982-09-03 | 1984-03-20 | Medtronic, Inc. | Ultrasound scanning system with semi-independent transducer array |
| US4457311A (en) * | 1982-09-03 | 1984-07-03 | Medtronic, Inc. | Ultrasound imaging system for scanning the human back |
| DE3319871A1 (de) * | 1983-06-01 | 1984-12-06 | Richard Wolf Gmbh, 7134 Knittlingen | Piezoelektrischer wandler zur zerstoerung von konkrementen im koerperinnern |
| US5143073A (en) * | 1983-12-14 | 1992-09-01 | Edap International, S.A. | Wave apparatus system |
| USRE33590E (en) * | 1983-12-14 | 1991-05-21 | Edap International, S.A. | Method for examining, localizing and treating with ultrasound |
| JPH074366B2 (ja) * | 1984-02-03 | 1995-01-25 | 株式会社東芝 | 医用超音波装置用水槽 |
| US4608979A (en) * | 1984-02-22 | 1986-09-02 | Washington Research Foundation | Apparatus for the noninvasive shock fragmentation of renal calculi |
| DE3417985C2 (de) * | 1984-05-15 | 1986-03-27 | Dornier System Gmbh, 7990 Friedrichshafen | Vorrichtung zur berührungsfreien Zerkleinerung von Konkrementen |
| US4649925A (en) * | 1985-01-14 | 1987-03-17 | Technicare Corporation | Ultrasonic transducer probe drive mechanism with position sensor |
| DE3532678A1 (de) * | 1985-09-13 | 1987-03-26 | Wolf Gmbh Richard | Vorrichtung zur ortung und zur zertruemmerung von konkrementen in koerperhoehlen |
| US6277076B1 (en) | 1988-05-11 | 2001-08-21 | Lunar Corporation | Ultrasonic densitometer with pre-inflated fluid coupling membranes |
| DE4016105B4 (de) * | 1989-06-12 | 2005-06-02 | Bicz, Wieslaw | Verfahren und Vorrichtung zur Erfassung von Oberflächenstrukturen |
| US5258922A (en) * | 1989-06-12 | 1993-11-02 | Wieslaw Bicz | Process and device for determining of surface structures |
| US5303708A (en) * | 1992-07-27 | 1994-04-19 | Animal Ultrasound Services, Inc. | Grading of poultry carcasses with ultrasound |
| WO1993022976A1 (en) * | 1992-05-12 | 1993-11-25 | Delmenico Peter F | Method and apparatus to establish target coordinates for lithotripsy |
| US5316003A (en) * | 1992-07-24 | 1994-05-31 | Animal Ultrasound Services, Inc. | Method and apparatus for positioning an ultrasonic transducer for longitudinal scanning of an animal or carcass |
| JPH0767453B2 (ja) * | 1992-08-03 | 1995-07-26 | 株式会社東芝 | 医用超音波装置用水槽 |
| JPH0767448B2 (ja) * | 1992-08-03 | 1995-07-26 | 株式会社東芝 | 医用超音波装置用水槽 |
| US5983123A (en) * | 1993-10-29 | 1999-11-09 | United States Surgical Corporation | Methods and apparatus for performing ultrasound and enhanced X-ray imaging |
| JP3461509B2 (ja) * | 1993-10-29 | 2003-10-27 | ユナイテッド ステイツ サージカル コーポレイション | ソノマモグラフィーおよびよりよいｘ線撮影を行う装置 |
| US5833627A (en) * | 1995-04-13 | 1998-11-10 | United States Surgical Corporation | Image-guided biopsy apparatus and methods of use |
| US5617864A (en) * | 1995-08-04 | 1997-04-08 | Animal Ultrasound Services, Inc. | Method and apparatus for positioning an ultrasonic transducer and a display screen |
| IL117767A0 (en) * | 1996-04-01 | 1996-04-01 | Ondson Ltd | Method and apparatus for measuring acceleration |
| US5820552A (en) * | 1996-07-12 | 1998-10-13 | United States Surgical Corporation | Sonography and biopsy apparatus |
| CN1058905C (zh) * | 1998-01-25 | 2000-11-29 | 重庆海扶(Hifu)技术有限公司 | 高强度聚焦超声肿瘤扫描治疗系统 |
| US6027457A (en) * | 1998-06-18 | 2000-02-22 | United States Surgical Corporation | Apparatus and method for securing tissue during ultrasound examination and biopsy |
| US6524246B1 (en) | 2000-10-13 | 2003-02-25 | Sonocine, Inc. | Ultrasonic cellular tissue screening tool |
| AU2003253954A1 (en) * | 2002-07-16 | 2004-02-02 | Alfred E. Mann Institute For Biomedical Engineering At The University Of Southern California | Support bra for ultrasonic breast scanner |
| US6825838B2 (en) | 2002-10-11 | 2004-11-30 | Sonocine, Inc. | 3D modeling system |
| US20060213274A1 (en) * | 2005-03-22 | 2006-09-28 | Siemens Westinghouse Power Corporation | Nondestructive inspection heads for components having limited surrounding space |
| US9351702B2 (en) * | 2009-02-02 | 2016-05-31 | Noble Sensors, Llc | Ultrasonic scanning probe with a tuning fork-type oscillator and feedback control thereof |
| JP5075864B2 (ja) * | 2009-03-24 | 2012-11-21 | 株式会社東芝 | 超音波撮像装置 |
| US10074199B2 (en) | 2013-06-27 | 2018-09-11 | Tractus Corporation | Systems and methods for tissue mapping |
| US10416122B2 (en) * | 2017-10-31 | 2019-09-17 | Westinghouse Electric Company Llc | Ultrasonic phased array transducer apparatus for the nondestructive inspection of a component under test |
| ES3040801T3 (en) * | 2018-05-16 | 2025-11-05 | Profound Medical Inc | Apparatus for directing energy from a multi-element source |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3269173A (en) * | 1962-03-02 | 1966-08-30 | Transformatoren & Roentgenwerk | Apparatus for ultrasonic diagnosis |
| DE1289617B (de) * | 1964-06-06 | 1969-02-20 | Siemens Ag | Ultraschall-Diagnostikgeraet |
| FR1497496A (fr) * | 1966-05-06 | 1967-10-13 | Massiot Philips Sa | Procédé et appareil d'analyse par ultrasons |
| US3480002A (en) * | 1967-01-24 | 1969-11-25 | Magnaflux Corp | Medical ultrasonic scanning system |
| US3547101A (en) * | 1967-05-24 | 1970-12-15 | Magnaflux Corp | Medical ultrasonic diagnostic system |
| US3765403A (en) * | 1968-05-20 | 1973-10-16 | Holotron Corp | Ultrasonic imaging techniques and mammograph equipment |
| US3603303A (en) * | 1968-10-08 | 1971-09-07 | Cornell Res Foundation Inc | Sonic inspection method and apparatus |
| GB1391903A (en) * | 1971-04-06 | 1975-04-23 | Nat Res Dev | Ultrasonic scanning apparatus |
| CA997851A (en) * | 1972-06-08 | 1976-09-28 | Commonwealth Of Australia (The) | Ultrasonic transducer array |
| DE2343706C2 (de) * | 1972-09-01 | 1982-06-16 | General Electric Co., Schenectady, N.Y. | Einrichtung zur Erzeugung einer visuellen Abbildung von Ultraschall-Echosignalen |
| NL7305667A (OSRAM) * | 1973-04-24 | 1973-06-25 | ||
| US3936791A (en) * | 1973-09-13 | 1976-02-03 | The Commonwealth Of Australia | Linear array ultrasonic transducer |
| AU490475B1 (en) * | 1974-02-21 | 1976-08-26 | Commonwealth Of Australia, The | Moving ultrasonic transducer array |
| US3990296A (en) * | 1975-01-08 | 1976-11-09 | Actron, A Division Of Mcdonnell Douglas Corporation | Acoustical holography imaging device |
-
1976
- 1976-04-28 GB GB36531/78A patent/GB1543740A/en not_active Expired
- 1976-04-28 GB GB17330/76A patent/GB1543739A/en not_active Expired
- 1976-04-28 CA CA251,297A patent/CA1076244A/en not_active Expired
- 1976-04-28 US US05/681,037 patent/US4094306A/en not_active Expired - Lifetime
- 1976-04-30 DE DE2619231A patent/DE2619231C2/de not_active Expired
- 1976-05-01 JP JP51050742A patent/JPS5930423B2/ja not_active Expired
- 1976-05-03 AT AT323576A patent/AT361605B/de not_active IP Right Cessation
- 1976-05-03 FR FR7613097A patent/FR2309865A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5930423B2 (ja) | 1984-07-26 |
| JPS52484A (en) | 1977-01-05 |
| GB1543739A (en) | 1979-04-04 |
| FR2309865A1 (fr) | 1976-11-26 |
| ATA323576A (de) | 1980-08-15 |
| FR2309865B1 (OSRAM) | 1981-11-27 |
| CA1076244A (en) | 1980-04-22 |
| US4094306A (en) | 1978-06-13 |
| AT361605B (de) | 1981-03-25 |
| DE2619231A1 (de) | 1976-11-11 |
| GB1543740A (en) | 1979-04-04 |
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| DE2631153A1 (de) | Ultraschall-pruefgeraet |
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