WO1988004088A1 - Sonde a barrette courbe pour echographe - Google Patents
Sonde a barrette courbe pour echographe Download PDFInfo
- Publication number
- WO1988004088A1 WO1988004088A1 PCT/FR1987/000463 FR8700463W WO8804088A1 WO 1988004088 A1 WO1988004088 A1 WO 1988004088A1 FR 8700463 W FR8700463 W FR 8700463W WO 8804088 A1 WO8804088 A1 WO 8804088A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bar
- support
- probe according
- probe
- curved
- Prior art date
Links
- 239000000523 sample Substances 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims description 32
- 239000006260 foam Substances 0.000 claims description 7
- 239000011325 microbead Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract description 2
- 238000001465 metallisation Methods 0.000 description 4
- 238000003856 thermoforming Methods 0.000 description 4
- 230000001934 delay Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
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
- G10K11/32—Sound-focusing or directing, e.g. scanning characterised by the shape of the source
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/42—Piezoelectric device making
Definitions
- the present invention relates to a curved bar probe for an echograph. It finds more particularly its application in the medical field where ultrasound scanners are used for diagnostic purposes to reveal images of internal tissue structures of human bodies studied. It can nevertheless find its application in all areas of use of ultrasound where neck strips are used.
- An echograph schematically comprises electrical generating means for producing an electrical signal vibrating at an acoustic frequency.
- This signal is applied to an element or rather to a strip of piezoelectric elements transducers ⁇ WHERE it is transformed into a mechanical excitation.
- the probe emits this mechanical excitation in a medium against which it is placed. Outside the transmission periods, the probe can be used to receive acoustic signals reflected by the medium and to transform these acoustic signals into electrical signals which can be introduced into reception devices. From the electrical signal thus received, useful information can be extracted, in particular information likely to allow the creation of an image. The appearance of the image depends on how you explore the environment to be examined.
- the scanning of the medium studied is a scanning for translation.
- the scanning follows the normal to the tangent to the curve formed by the arrangement of the elements: it is sectoral if this curve is an arc of a circle.
- curved bar probes are traditionally carried out in the following manner.
- a relatively thin support for example 2 to 3 mm, made of a flexible material is used.
- a bar of a piezoelectric crystal is then used which is fixed to this support.
- a partition is made in this bar so as to divide it into a plurality of piezoelectric elements.
- the partition is made in such a way that between each element the support is not cut.
- Each element remains attached to the support.
- the support is flexible, it suffices to fix it on a suitable curved base to obtain a desired curved bar.
- n * 8 * 308 373. * filed on DECEMBER 03, 198 * such a realization is described.
- the object of the invention is to remedy the drawbacks mentioned by proposing for the support a material which is rigid at room temperature, but which has the particularity of being heat-deformable. This means that if this material is heated, it can be deformed. When it cools, it keeps the shape acquired last: that which was given to it when it was hot. As this heat-deformable material retains the shape that it has been given, it is possible to use it as a receptacle for pouring therein a material to polymerize which will serve as a base. The polymerization takes place preferably at room temperature.
- the material to be polymerized is preferably the same material as that which serves to make the support. As a result, there is no longer a surface creating parasitic reflections from the rear wave.
- rigid thermo-deformable materials also have the advantage of being able to be easily adapted in acoustic impedance.
- the present invention relates to a curved strip probe for an echograph, of the type comprising piezoelectric elements fixed on a deformable support characterized in that the support is made of a rigid thermo-deformable material at ambient temperature.
- FIG. 1 a bar of piezoelectric elements mounted on a support according to the invention
- FIG. 1 represents a bar of piezoelectric transducer elements mounted on a support according to the invention.
- This bar 1 essentially comprises a support 2, piezoelectric elements such as 3, these piezoelectric elements being held between the support 2 and acoustic transition blades *. Between the support 2 and each of the elements 3 there is an electrode 5, and between each of the elements 3 and each of the blades * there is an electrode 6.
- These electrodes are intended to receive an electrical signal at the time of an excitation. They then apply in element 3 a corresponding electric field. Under the effect of this field, the element 3 begins to vibrate and transmits, by the blade 4, the vibration to a medium to be studied and which is in contact with it (not shown).
- the electrical continuity of the electrodes 5 and 6 is taken up by blocks such as 7 and 8 placed on either side of each element.
- Each block of insulating material is covered with two electrically independent metallizations, respectively 9 and 10, in each case in contact with the electrodes 5 and 6. These metallizations allow a simpler connection to the electrodes 5 and 6.
- the bar 1 is manufactured in the rectilinear state as in the cited state of the art.
- An elongated support 2 is used to construct it, a bar of material piezoelectric, and an elongated blade: the support and the blade are glued to the bar.
- strips on both sides of the bar are already inserted with the metallization partition.
- cuts such as 11 and 12 are carried out, in general with a saw, in order to divide the piezoelectric bar into a series of independent piezoelectric elements.
- the support is only partially started by these cutouts: it ensures the cohesion of all the elements. It is known to avoid risks of crosstalk between adjacent piezoelectric elements to divide each piezoelectric element (separated from each other by deep cutouts 12), by shallow cutouts 11 which cut them in the middle.
- the essential characteristic of the invention resides in the nature of the material which constitutes the support 2.
- the bar remains rectilinear and rigid: the the material of which it is made is hard.
- this material has the particularity of softening when it is heated and of taking the form which it imposes on it at that time.
- An appropriate curved shape 13 is therefore used, and the shape 13 is placed and the bar 1 in an oven which is brought to an adequate temperature. Under the effect of its own weight, or possibly by exerting an elastic force on its ends 1 * and 15, the bar can be caused to bend according to the shape of the shape 13.
- the oven is allowed to cool, the strip then has the appearance shown diagrammatically in FIG. 2: it is now again rigid but curved.
- thermoformable curved support consists of the acoustic transition blade itself.
- sawing is carried out from base 2 to a certain height in the blade.
- the material which can be used for the support 2 and which has the thermoforming properties thus highlighted is preferably a polymerizable material which has the appearance of a foam before its polymerization.
- This foam can be syntactic, that is to say com ⁇ carry a liquid with microbubbles of a gas, or be non syntactic, that is to say be in the form of beads which agglomerate with each other during of polymerization.
- This foam is preferably an epoxy resin or else a polyurethane. It is preferably a cold risable polymer foam.
- the foam is preferably an epoxy resin or else a polyurethane. It is preferably a cold risable polymer foam.
- the foam is preferably an epoxy resin or else a polyurethane. It is preferably a cold risable polymer foam.
- the foam is preferably an epoxy resin or else a polyurethane. It is preferably a cold risable polymer foam.
- the plastic microbeads are phenolic icrobilies.
- materials are chosen whose thermoforming is obtained at a temperature of the order of, or greater than 90 ° - 100 *. Indeed it is known that electrical probes piézo ⁇ centr ent in use. They are then brought to temperatures that might, if we, not careful, pro ⁇ voquer influence by unwanted deformations of the bar. For this reason the thermoforming temperature is chosen at the value indicated.
- the probes cannot be used on human bodies, and there is therefore no risk that this temperature will be reached during an experiment.
- the support 2 is thin. In the invention it has a thickness substantially equal to the elastic support of the cited state of the art.
- the thermoformed bar is placed at the bottom of a mold, with its concave part upwards, and the same material is poured from above as that which made up the support (but not yet polymerized).
- the base material is polymerized: the mold is shaped so as to give this base, moreover, a form useful for handling the probe.
- the base is made as soon as possible after the thermal deformation of the bar. For example, this operation is done the next day.
- the material which constitutes the base is the same as that which constitutes the support, if these operations are well executed, at the end, it is almost impossible to discern the part, in the support-base, of what belongs to the support or at the bottom. There is therefore no longer any acoustic reflection surface under the support. Reflections can therefore no longer occur.
- the advantage of having chosen a cold polymerizable material is easily understood. During the subsequent production of the base, it is not necessary to polymerize this base material to heat the entire strip. This would risk destroying the deformation given to it previously.
- thermo-deformable materials are also to be able to accept a wide variety of loading materials. This gives them great ability to properly adjust the acoustic impedance.
- micro-drops 17 of Iridium can be deposited on the apparent lateral metallizations of the blocks of each element. Then, on each side of the bar, a printed circuit 18 provided with connecting tracks such as 21 and 22 is approached. This circuit bears, opposite the connections to be metallized 19, also provided with microdrops 20 rflndium. The printed circuits are then placed on the blanks of the strip and, by a reflow operation in an oven, it is possible to obtain the connection of all the elements to the tracks. These tracks conduct the electrical signals, at remission and at reception, from the generating members and towards the receiving members. The shape presented so far for the bar is a convex shape.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8616661A FR2607591B1 (fr) | 1986-11-28 | 1986-11-28 | Sonde a barrette courbe pour echographe |
FR86/16661 | 1986-11-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1988004088A1 true WO1988004088A1 (fr) | 1988-06-02 |
Family
ID=9341354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1987/000463 WO1988004088A1 (fr) | 1986-11-28 | 1987-11-24 | Sonde a barrette courbe pour echographe |
Country Status (5)
Country | Link |
---|---|
US (1) | US5109860A (fr) |
EP (2) | EP0271395A1 (fr) |
JP (1) | JPH02501430A (fr) |
FR (1) | FR2607591B1 (fr) |
WO (1) | WO1988004088A1 (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5453575A (en) * | 1993-02-01 | 1995-09-26 | Endosonics Corporation | Apparatus and method for detecting blood flow in intravascular ultrasonic imaging |
GB2287375B (en) * | 1994-03-11 | 1998-04-15 | Intravascular Res Ltd | Ultrasonic transducer array and method of manufacturing the same |
US5711058A (en) * | 1994-11-21 | 1998-01-27 | General Electric Company | Method for manufacturing transducer assembly with curved transducer array |
US7226417B1 (en) | 1995-12-26 | 2007-06-05 | Volcano Corporation | High resolution intravascular ultrasound transducer assembly having a flexible substrate |
US5857974A (en) * | 1997-01-08 | 1999-01-12 | Endosonics Corporation | High resolution intravascular ultrasound transducer assembly having a flexible substrate |
FR2815723B1 (fr) * | 2000-10-24 | 2004-04-30 | Thomson Csf | Procede systeme et sonde pour l'obtention d'images par l'intermediaire d'ondes emises par une antenne apres reflexion de ces ondes au niveau d'un ensemble servant de cible |
US20080119703A1 (en) | 2006-10-04 | 2008-05-22 | Mark Brister | Analyte sensor |
US20190357827A1 (en) | 2003-08-01 | 2019-11-28 | Dexcom, Inc. | Analyte sensor |
US7285897B2 (en) * | 2003-12-31 | 2007-10-23 | General Electric Company | Curved micromachined ultrasonic transducer arrays and related methods of manufacture |
DE102006010009A1 (de) * | 2006-03-04 | 2007-09-13 | Intelligendt Systems & Services Gmbh & Co Kg | Verfahren zum Herstellen eines Ultraschallprüfkopfes mit einer Ultraschallwandleranordnung mit einer gekrümmten Sende- und Empfangsfläche |
WO2012142502A2 (fr) | 2011-04-15 | 2012-10-18 | Dexcom Inc. | Étalonnage avancé de capteur d'échantillon à analyser et détection d'erreur avancée |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2926182A1 (de) * | 1979-06-28 | 1981-01-22 | Siemens Ag | Ultraschallwandleranordnung |
EP0128049A2 (fr) * | 1983-06-07 | 1984-12-12 | Matsushita Electric Industrial Co., Ltd. | Sonde ultrasonore muni d'un support absorbant |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4354501A (en) * | 1979-08-28 | 1982-10-19 | Univ Washington | Esophageal catheter including ultrasonic transducer for use in detection of air emboli |
JPS57181299A (en) * | 1981-04-30 | 1982-11-08 | Yokogawa Hokushin Electric Corp | Conformal array transducer and its manufacture |
JPS58120397A (ja) * | 1982-01-13 | 1983-07-18 | Hitachi Medical Corp | 超音波探触子の製造方法 |
US4556066A (en) * | 1983-11-04 | 1985-12-03 | The Kendall Company | Ultrasound acoustical coupling pad |
-
1986
- 1986-11-28 FR FR8616661A patent/FR2607591B1/fr not_active Expired
-
1987
- 1987-11-24 WO PCT/FR1987/000463 patent/WO1988004088A1/fr not_active Application Discontinuation
- 1987-11-24 EP EP87402635A patent/EP0271395A1/fr not_active Withdrawn
- 1987-11-24 EP EP87907781A patent/EP0333737A1/fr not_active Ceased
- 1987-11-24 US US07/368,338 patent/US5109860A/en not_active Expired - Fee Related
- 1987-11-24 JP JP63500067A patent/JPH02501430A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2926182A1 (de) * | 1979-06-28 | 1981-01-22 | Siemens Ag | Ultraschallwandleranordnung |
EP0128049A2 (fr) * | 1983-06-07 | 1984-12-12 | Matsushita Electric Industrial Co., Ltd. | Sonde ultrasonore muni d'un support absorbant |
Also Published As
Publication number | Publication date |
---|---|
FR2607591A1 (fr) | 1988-06-03 |
FR2607591B1 (fr) | 1989-12-08 |
JPH02501430A (ja) | 1990-05-17 |
EP0333737A1 (fr) | 1989-09-27 |
US5109860A (en) | 1992-05-05 |
EP0271395A1 (fr) | 1988-06-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0332637B1 (fr) | Sonde pour appareil a ultrasons munie d'un arrangement concave d'elements piezo-electriques | |
US6038752A (en) | Method for manufacturing an ultrasonic transducer incorporating an array of slotted transducer elements | |
WO1988004088A1 (fr) | Sonde a barrette courbe pour echographe | |
EP0150634B1 (fr) | Sonde pour l'échographie ultrasonore comportant une mosaique d'éléments définissant une surface convexe | |
EP0769988A1 (fr) | Transducteur acoustique multifrequences a bandes larges | |
FR2847492A1 (fr) | Procede pour etablir une connexion electrique avec un transducteur ultrasonore a travers un materiau d'isolation acoustique | |
FR2848478A1 (fr) | Matiere absorbante pour dispositif transducteur a ultrasons micro-usine | |
EP0285482B1 (fr) | Transducteur acoustique multifréquences, notamment pour imagerie médicale | |
FR2962533A1 (fr) | Couches de transfert thermique et d'adaptation acoustique pour transducteur ultrasonore | |
FR2585944A1 (fr) | Sonde a ultrasons implantable et son pro cede de fabrication | |
EP0335878B1 (fr) | Sonde d'echographe avec circuit de connexion perfectionne | |
EP1625659B1 (fr) | Resonateurs integres et base de temps incorporant de tels resonateurs | |
CA1298395C (fr) | Sonde d'appareil a ultrasons a barrette d'elements piezo-electriques | |
JP2002232995A (ja) | 超音波探触子及びその製造方法 | |
FR2546306A1 (fr) | Appareil d'examen echographique de milieux aux ultrasons equipe d'un nouveau type de dispositif de transduction ultrasonore | |
FR2634089A1 (fr) | Transducteur ultrasonore a sensibilite amelioree | |
WO1990008965A1 (fr) | Dispositif personnalisable d'identification passive | |
FR2736790A1 (fr) | Traducteur ultrasonore comprenant un ensemble focalisant d'elements piezoelectriques et une lentille mince de focalisation | |
JPH01131527A (ja) | 音響光学素子 | |
BE483470A (fr) | ||
EP0290557A1 (fr) | Sonde d'echographe a arrangement d'elements piezo-electriques |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1987907781 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1987907781 Country of ref document: EP |
|
WWR | Wipo information: refused in national office |
Ref document number: 1987907781 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1987907781 Country of ref document: EP |