WO1982004157A1 - Installation pour emettre et recevoir des ondes ultrasonores focalisees - Google Patents

Installation pour emettre et recevoir des ondes ultrasonores focalisees Download PDF

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Publication number
WO1982004157A1
WO1982004157A1 PCT/EP1982/000108 EP8200108W WO8204157A1 WO 1982004157 A1 WO1982004157 A1 WO 1982004157A1 EP 8200108 W EP8200108 W EP 8200108W WO 8204157 A1 WO8204157 A1 WO 8204157A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
plane
oscillator
liquid lens
lens
Prior art date
Application number
PCT/EP1982/000108
Other languages
German (de)
English (en)
Inventor
Institut Battelle
Original Assignee
Lierke Ernst Guenter
Sudhof Helmut
Floegel Karl
Grossbach Rudolf
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
Priority claimed from DE19813120611 external-priority patent/DE3120611A1/de
Priority claimed from DE19813142639 external-priority patent/DE3142639A1/de
Application filed by Lierke Ernst Guenter, Sudhof Helmut, Floegel Karl, Grossbach Rudolf filed Critical Lierke Ernst Guenter
Publication of WO1982004157A1 publication Critical patent/WO1982004157A1/fr

Links

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
    • G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
    • 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 a device for emitting and receiving focused ultrasonic waves, in particular for local heating of biological tissues, e.g. Tumors with a piezoelectric ultrasonic transducer system and a lens.
  • Ultrasonic waves can be focused just like any other type of wave. At operating frequencies between 0.5 and 5 MHz, the corresponding wavelengths are e.g. in liquids (water) between 3 and 0.3 mm and
  • the present invention is therefore based on the object of developing a focusing ultrasound transducer system with which the area to be examined or treated can be scanned in a targeted manner without great technical effort.
  • a focusing ultrasound transducer system with which the area to be examined or treated can be scanned in a targeted manner without great technical effort.
  • Such a device should be usable in all relevant areas of medicine and biology as well as material testing and should be constructed as possible so that the transducer system is interchangeable.
  • the ultrasonic transducer system has a disk-shaped plane oscillator, in front of which a liquid chamber with a first liquid is arranged, in which one is filled with a second liquid Liquid lens is located, the focal length of the liquid lens being variable by changing the volume of the second liquid and / or the focal point in the focal plane is mechanically displaceable.
  • the device according to the invention can be used both in medical diagnosis, for example for locating tumors, kidney stones or the like, and in therapy, for example. be used for local hyperthermia treatment.
  • the main advantage in these areas compared to the previously known devices of this type is that the focusing converter can be easily adapted to commercially available therapy or diagnostic devices or material testing devices. As a result, a relatively large volume area can be scanned automatically with considerable gain for the useful level-noise level ratio, or any volume area can be treated as gently and specifically as possible.
  • FIG. 1 shows an embodiment of the device according to the invention, in which the focal point in the focal plane 25 can be shifted linearly or azimuthally and the focal length can be varied;
  • FIG. 2 shows a top view of the mounting of the ultrasound transducer system in order to achieve a linear or azimuthal displacement of the focal point in the focal plane;
  • FIG. 3 shows the formation of a plano-convex liquid lens *, - k -
  • FIG. 4 shift of the focal point in the focal plane by rotation
  • FIG. 5 shows a transducer composed of diagnostic and therapeutic parts and proposed according to the invention
  • FIG. 6 shows the effective range of the sound during therapy operation with an axial sound-free zone
  • the device according to the invention essentially consists of a liquid chamber 1, which contains a liquid lens 2 and a, comprising the ultrasonic transducer system 3, with the liquid chamber 1 e.g. outer housing 5 detachably connected by a threaded closure 4
  • the liquid lens 2 is formed from two, more or less spherically curved, elastic and hydraulically deformable membranes 6, between which a liquid, e.g. Frigen, glycerin or the like at the speed of sound c. is included.
  • the liquid in the liquid chamber 1 has a different speed of sound c ⁇ and is preferably water.
  • the liquid volume of the lens 2 can be varied via a line 7, a cylinder 8 with a piston, which is operated by a gearwheel with a transmission 9 and a motor 10.
  • membranes 6 are more or less curved. From the radius of curvature r. , r_ of the two membranes 6 and from the sound velocities c,, c_ the focal length f of the liquid lens 2 thus formed can be calculated, according to the formula
  • the rear half of the liquid chamber 1 does not need to be closed off by a membrane or film if the ultrasound transducer 3 is permanently installed and directly coupled.
  • the film 12 to which the transducer must in turn be acoustically coupled by means of a suitable coupling medium ensures unimpeded passage of energy.
  • a flexible bearing 15 is provided towards the liquid chamber 1 so that the planar oscillator 3 lies taut on the film 12 even when its angle of inclination with respect to the optical axis of the liquid lens 2 changes.
  • the storage 15 is e.g. made of a metal bellows and forms part of the lateral wall of the liquid chamber 1.
  • the faceplate 3 is placed in a housing 16 on its n ⁇ 2-thick base plate 17, e.g. made of metal, fastened.
  • the housing of the planar transducer 3 in such a housing 16 facilitates the interchangeability of the ultrasonic transducer system. This is expedient for a versatile applicability of the device according to the invention.
  • damped pulses can be obtained to achieve short pulses and e.g. undamped circular disk-shaped piezoelectrically arranged face-plates are used in therapy.
  • the outer housing 5 is either uncoupled from the liquid chamber 1 or provided with a window 18 through which manipulation is made possible. So that the contact with the film 12 is not lost when the angle of inclination of the planar transducer 3 or the base plate 17 changes, the housing 16 or the planar transducer is on the side opposite the liquid chamber 1 via a spring-loaded, central, in the direction of the surface normal rod 19 ge ge. This rod 19 moves. in the hollow cylinder 2o in the axial direction and the suspension 21 ensures in the zu ⁇
  • the rod 19 is on a disc 22 arranged perpendicular to the optical axis of the liquid lens 2 in a radial groove 23
  • modification enables the angle of inclination of the plane transducer with respect to the optical axis of the liquid lens 2, and thus a linear Ver ⁇ shift of the focal point in the focal plane.
  • the adjustment of the actuator 24 can be done manually as well as m x. motorized.
  • the disk 22 is designed as a turntable, which is driven by a motor 27 with a gear ratio 28 in Rotation can be offset.
  • a circular movement of the support point on the turntable, while at the same time changing the support point 24, is achieved.
  • only a linear or only a circular displacement can also be brought about.
  • the liquid lens with the second liquid 29 can also be formed by the plane oscillator 3 on the one hand and a film 3o on the other hand, as shown in FIG. 3.
  • a liquid chamber is only between the lens system and the area to be treated. However, this is also unnecessary if the therapy is carried out in a water bath.
  • FIG. 1 A further, simpler focus shift is shown schematically in FIG.
  • the unit containing the plane vibrator 3 and the liquid lens 2 is arranged eccentrically to the axis of rotation.
  • the rotation can be brought about by a motor.
  • the focal length can be done manually or periodically by means of a pump by changing the lens volume.
  • the plane oscillator consists of two parts, namely an outer ring 31, which is undamped and is used for line radiation, and a central part 32, which is damped with a damping substance 33, for pulse echo - Business. Both parts are fastened concentrically on the base plate 34 of the housing (not shown here).
  • n can be the same or different.
  • the proposed combination enables diagnosis and treatment to be carried out simultaneously.
  • the temperature rise in the focal point of the therapy head is registered with a thermocouple and must be kept constant within predetermined temperature limits.
  • the diagnostic insert 32 the focal point can be adjusted precisely to the target area, ie the thermocouple located in the center of the target area, before the therap is carried out via the same, now adjustable lens system.
  • FIG. 6 shows that tissue overheating in the region of the focal point of the lens 35 is made possible when the transducer part 31, which is only intended for therapy, is used. At the same time, the sound-free leading section 36 is protected.
  • the target area can be diagnostically explored and monitored immediately before and during therapy without the treatment head having to be replaced. If only the converter head with a lens system is adapted, simultaneous diagnosis and therapy can be carried out with commercially available generators or diagnostic devices.
  • the low-performance use of diagnostics in the center of the therapy head reduces the transmission power only slightly in proportion to the area with the same intensity, but has a favorable influence on the axial temperature profile in the distance between the lens and the focal point.
  • the transducer construction according to the invention enables tissue overheating in the area of the acoustic focal point of the lens while protecting the leading section at the same time.
  • the inventive device for hyperthermia in combination with radiation therapy of tumors can be gleich ⁇ sets.

Abstract

Dans l'installation pour emission et reception d'ondes ultrasonores focalisees un oscillateur plan (3) en forme de disque est couple a une chambre a liquide (1). Dans la chambre a liquide (1) se trouve une lentille liquide (2) qui contient un second liquide. La distance focale de la lentille liquide (2) peut etre modifiee en agissant sur le volume de liquide qu'elle contient. En outre, le foyer est deplacable dans le plan focal par exemple en reglant l'angle de l'oscillateur plan (3) par rapport a l'axe optique de la lentille liquide (2) ou par rotation excentree de la lentille liquide (2) avec l'oscillateur plan (3).
PCT/EP1982/000108 1981-05-23 1982-05-19 Installation pour emettre et recevoir des ondes ultrasonores focalisees WO1982004157A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19813120611 DE3120611A1 (de) 1981-05-23 1981-05-23 "vorrichtung zur abstrahlung und zum empfang fokussierter ultraschallwellen"
DE3120611 1981-05-23
DE19813142639 DE3142639A1 (de) 1981-10-28 1981-10-28 "vorrichtung zur abstrahlung und zum empfang fokussierter ultraschallwellen
DE3142639811028 1981-10-28

Publications (1)

Publication Number Publication Date
WO1982004157A1 true WO1982004157A1 (fr) 1982-11-25

Family

ID=25793477

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1982/000108 WO1982004157A1 (fr) 1981-05-23 1982-05-19 Installation pour emettre et recevoir des ondes ultrasonores focalisees

Country Status (2)

Country Link
EP (1) EP0079351A1 (fr)
WO (1) WO1982004157A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0131653A1 (fr) * 1983-07-19 1985-01-23 N.V. Optische Industrie "De Oude Delft" Dispositif pour la destruction à distance des objets pierreux présents dans le corps par ondes de choc soniques
EP0131654A1 (fr) * 1983-07-19 1985-01-23 N.V. Optische Industrie "De Oude Delft" Dispositif pour la destruction à distance des objets pierreux présents dans le corps par ondes de choc soniques
EP0160580A1 (fr) * 1984-04-04 1985-11-06 Edap International Sonde d'échographie à disque piézoélectrique oscillant solidaire d'une membrane déformable formant lentille de focalisation
EP0275460A1 (fr) * 1986-12-22 1988-07-27 Siemens Aktiengesellschaft Tête émettrice d'ondes de choc pour la fragmentation à distance de concrétions
DE3739393A1 (de) * 1987-11-20 1989-06-01 Siemens Ag Lithotripter mit verstellbarer fokussierung
WO2000063719A1 (fr) * 1999-04-20 2000-10-26 Synthes Ag Chur Dispositif permettant d'obtenir par voie percutanee des coordonnees tridimensionnelles a la surface d'un organe d'humain ou d'animal

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU179076A1 (ru) * В. Г. Щербинский Пьезоискатель для ультразвуковой дефектоскопии
US3927557A (en) * 1974-05-30 1975-12-23 Gen Electric Acoustic imaging apparatus with liquid-filled acoustic corrector lens
US3968459A (en) * 1975-01-29 1976-07-06 Sperry Rand Corporation Ultrasonic driver transducer
GB1446022A (en) * 1973-03-06 1976-08-11 Holotron Corp Radiation translation by rotary transducer scanning
US4215585A (en) * 1976-04-23 1980-08-05 Tokyo Shibaura Electric Co., Ltd. Ultrasonic scanner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU179076A1 (ru) * В. Г. Щербинский Пьезоискатель для ультразвуковой дефектоскопии
GB1446022A (en) * 1973-03-06 1976-08-11 Holotron Corp Radiation translation by rotary transducer scanning
US3927557A (en) * 1974-05-30 1975-12-23 Gen Electric Acoustic imaging apparatus with liquid-filled acoustic corrector lens
US3968459A (en) * 1975-01-29 1976-07-06 Sperry Rand Corporation Ultrasonic driver transducer
US4215585A (en) * 1976-04-23 1980-08-05 Tokyo Shibaura Electric Co., Ltd. Ultrasonic scanner

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0131653A1 (fr) * 1983-07-19 1985-01-23 N.V. Optische Industrie "De Oude Delft" Dispositif pour la destruction à distance des objets pierreux présents dans le corps par ondes de choc soniques
EP0131654A1 (fr) * 1983-07-19 1985-01-23 N.V. Optische Industrie "De Oude Delft" Dispositif pour la destruction à distance des objets pierreux présents dans le corps par ondes de choc soniques
EP0160580A1 (fr) * 1984-04-04 1985-11-06 Edap International Sonde d'échographie à disque piézoélectrique oscillant solidaire d'une membrane déformable formant lentille de focalisation
EP0275460A1 (fr) * 1986-12-22 1988-07-27 Siemens Aktiengesellschaft Tête émettrice d'ondes de choc pour la fragmentation à distance de concrétions
DE3739393A1 (de) * 1987-11-20 1989-06-01 Siemens Ag Lithotripter mit verstellbarer fokussierung
WO2000063719A1 (fr) * 1999-04-20 2000-10-26 Synthes Ag Chur Dispositif permettant d'obtenir par voie percutanee des coordonnees tridimensionnelles a la surface d'un organe d'humain ou d'animal
AU766981B2 (en) * 1999-04-20 2003-10-30 Ao Technology Ag Device for the percutaneous obtainment of 3D-coordinates on the surface of a human or animal organ

Also Published As

Publication number Publication date
EP0079351A1 (fr) 1983-05-25

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