CN103341241A - High-strength focusing ultrasonic energy converter array - Google Patents
High-strength focusing ultrasonic energy converter array Download PDFInfo
- Publication number
- CN103341241A CN103341241A CN2013103120763A CN201310312076A CN103341241A CN 103341241 A CN103341241 A CN 103341241A CN 2013103120763 A CN2013103120763 A CN 2013103120763A CN 201310312076 A CN201310312076 A CN 201310312076A CN 103341241 A CN103341241 A CN 103341241A
- Authority
- CN
- China
- Prior art keywords
- ultrasonic transducer
- ultrasonic energy
- array
- horn
- focusing
- 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
Images
Landscapes
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Surgical Instruments (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
The invention discloses a high-strength focusing ultrasonic energy converter array. The high-strength focusing ultrasonic energy converter array comprises a spherical crown type rigid supporting frame and a plurality of ultrasonic energy converters. One ultrasonic energy converter is independently placed in the center of the spherical crown type rigid supporting frame, and the rest of the ultrasonic energy converters are distributed on multiple layers of concentric rings in a dispersed mode with the one ultrasonic energy converter as the center, angular separations between different ring layers are unequal, the separation between every two ring layers and the distance between every two adjacent ultrasonic energy converters inside the same ring are both within 5mm, and the positions of initial ultrasonic energy converters of each layer of concentric rings are determined randomly. Each ultrasonic energy converter is provided with an independent electric excitation signal feeder line, and the electric excitation signal feeder lines are connected to a phase-control signal excitation system respectively. Phase position and voltage amplitude distribution of the ultrasonic energy converters is calculated through a focus mode synthetic method based on the pseudo-inverse matrix theory, acoustic beam electronic focusing and scanning are realized, needed single-focus-point or multi-focus-point sound field control modes are produced, and high-strength focusing ultrasonic energy converter array is applied to quick heating melting of a target trauma focus inside a human body.
Description
Technical field
The present invention relates to utilize the supersonic vibration high strength sound field output field of inverse piezoelectric effect, specifically, relate to a kind of high-intensity focusing ultrasonic transducer array that is applied to the high-intensity focus supersonic tumor treatment.
Background technology
Along with the development of ultrasonic technique, the aerial application of high power sound wave is extensive day by day.In biomedical engineering, fields such as ultrasonic medical technology, in order to obtain the higher-strength sound field, the active self-focusing of many employing curved surfaces at present, sound lens focusing, the complex array self-focusing, modes such as phase array focusing, the obtain manner of these several high strength sound fields all has application at a plurality of production fields, can satisfy the needs of production application substantially, but also come with some shortcomings, the active self-focusing of curved surface and sound lens focusing mode, the ultrasonic energy conversion ratio is low, the focusing acoustical power is little, especially the active self-focusing of curved surface also exists difficulty of processing big, cost is than problems such as height, though it is big that complex array self-focusing and phase array focusing focus on acoustical power, also exists the ultrasonic energy conversion ratio low, the power consumption height, volume is big, be not easy to problems such as mobile.
The high intensity focused ultrasound phased array is one of critical component of phase control-type high-intensity focus supersonic tumor therapy system.By regulating and control wherein excitation phase and the amplitude of array element arbitrarily, can realize that external supersonic converges at one or more focuses in human body, in the target area, form high-strength sound field zone, and then non-normal tissue's cell at focus place was heated up (Nei Wenduda was more than 65 ℃ in 5～10 seconds) and coagulation necrosis rapidly in very short time, and the outer normal structure of focus only has the less energy deposition and damage little.But in the surgical operation process of reality, if the distance between each ultrasonic energy unit is bigger, spatial distribution is compact inadequately, is easy to generate bigger secondary lobe when electron focusing and scanning, may cause outside the target area normal structure by superheated, harm patient normal structure health.
Obtain the deficiency of technology in order to overcome above high strength sound field, publication number is that the patent documentation of CN1775327 discloses a kind of array element high-intensity focused ultrasound spherical phased array of dense distribution ringwise, this phased array is made up of the array element of a large aperture rigidity ball-crown body and several Discrete Distribution, the central circular hole of ball-crown body provides installing space for localization by ultrasonic Device Testing probe, it is on the some layers of concentric ring of initial point that all array elements are distributed in the ball-crown body center discretely, angular separation between each circular layer equates, the initial element position of each layer concentric ring is decided at random, all the other array elements then in succession by etc. angular separation be evenly distributed on the concentric ring, each array element all has independently electric excitation signal feeder line, is connected to the phased signal excitation system respectively." this phased array has been owing to installed localization by ultrasonic Device Testing probe in the central circular hole of ball-crown body; the focus energy when causing focusing on the beam axis is not concentrated; the distance (being the focus scanning scope) of the beam axis of focus point position skew simultaneously is restricted, and influences the therapeutic domain of this transducer; Each array element branch takes the angular separation between each circular layer to equate in addition, cause the adjacent array element ring spacing of inner circular layer bigger than the adjacent array element ring spacing of outer circular layer, it is big that the secondary lobe that produces during phase array focusing is densely arranged phased array than array element under the same terms, influences focusing effect.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of high-intensity focusing ultrasonic transducer array with sandwich type structural ultrasonic transducer, the phase control-type high intensity focused ultrasound system that is used for the MRI guiding the present invention includes a ball crown type rigid cage and several and is connected in ultrasonic transducer on the ball crown type rigid cage.
Ultrasonic transducer comprises bolt, back shroud, piezoelectric ceramic piece, electrode slice, horn, swivel sleeve, oscillating plate and is bonded in coupling layer on the oscillating plate.Back shroud and horn connect clamping by back shroud, piezoelectric ceramic piece, electrode slice and the horn that bolt will be set on the bolt successively, constituted the power conversion part of ultrasound transducer array, the excitation power supply conversion of signals that excitation power supply is exported is the ultrasonic vibrational energy of ultrasonic transducer horn front end.Horn is provided with the ring flange that connects usefulness with the ball crown type rigid cage in addition.Swivel sleeve is arranged on the front end of horn by welding or thread connection, perhaps swivel sleeve and horn manufacture an one-piece parts, oscillating plate is by welding or the bonding front end that is arranged on swivel sleeve, coupling layer is bonded in the front end of oscillating plate, and the material of coupling layer is foam plastics or epoxy resin.The extensional vibration that power conversion partly produces is converted to the bending vibration of oscillating plate and coupling layer after swivel sleeve is delivered to oscillating plate, bending vibration is that ultrasound wave is easy to one of vibration mode of propagating with Air Coupling most, be conducive to the propagation of ultrasonic vibrational energy from the oscillating plate to the air, the coupling layer of oscillating plate front end stickup has improved the transmission coefficient of ultrasonic vibrational energy from the oscillating plate to the air in addition, more is conducive to the realization of the high-strength sound field in oscillating plate the place ahead.The bending vibration natural frequency of oscillating plate and coupling layer is consistent with ultrasonic transducer extensional vibration natural frequency, after the electrode slice of ultrasonic transducer inserts the signal of telecommunication of excitation power supply, ultrasonic transducer is operated in its natural frequency point, ultrasound transducer system forms resonance, and it is maximum that the bending vibration amplitude of oscillating plate and coupling layer reaches.
The ball crown type rigid cage is provided with several for the hole that ultrasonic transducer is installed, radius of curvature R=the L1+L2+L3 of ball crown type rigid cage, wherein L1 is the focusing minimum-depth of this phased array, L2 is the axial scan scope of this phased array, L3 be in the ultrasonic transducer coupling layer to the distance between the fixed flange, the f value of ball crown type rigid cage satisfies 0.70≤f value≤0.85, and wherein the f value is the radius of curvature R of rigid cage spherical crown and the ratio of spherical crown base diameter D.
The central authorities of ball crown type rigid cage place a ultrasonic transducer separately, all the other ultrasonic transducer Discrete Distribution are on some layers of concentric ring centered by this ultrasonic transducer, angular separation between each circular layer is all unequal, angular separation is centered by the ultrasonic transducer of ball crown type rigid cage central authorities, with the corner dimension between two ultrasonic transducers in the circular layer, interval between each circular layer reaches with the spacing of encircling interior adjacent ultrasonic transducer in 5mm, the initial ultrasonic transducers locations of every layer of concentric ring is decided at random, all the other ultrasonic transducers in succession by etc. angular separation closely be evenly distributed on the concentric ring, each ultrasonic transducer has independently electric excitation signal feeder line, is connected to the phased signal excitation system respectively.The excitation power supply signal frequency of the operating frequency of all ultrasonic transducers and all ultrasonic transducers is all identical, each excitation power supply signal is independent controlled, phase place and voltage amplitude have nothing in common with each other, by calculate phase place and the voltage amplitude combination of ultrasonic transducer based on the focus mode synthetic method of pseudo inverse matrix theory, the sound wave that ultrasonic transducer is energized power supply signal excitation back radiation superposes in three dimensions, wave surface curvature and the center of sound wave are changed, realize electron focusing and the scanning of acoustic beam, produce required single focus or many focuses sound field control model, the Fast Heating that is applied to human body internal object tumor focus melts.
With array element ringwise the high-intensity focused ultrasound spherical phased array of dense distribution compare, ultrasonic transducer in this high-intensity focusing ultrasonic transducer array has adopted sandwich type structural, it is big to have power capacity, ultrasonic vibrational energy conversion ratio height, the advantage that the sound field output intensity is high, the action time that tumor focus in the patient body is added heating ablation is short, reduced patient's operation misery, it is simple also to have novel structure in addition, overall volume is little, conveniently moving, sweep limits is big, difficulty of processing is little, production cost, advantages such as long service life, be conducive to its industrialized development, have a extensive future.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of ball crown type rigid cage of the present invention.
Fig. 3 is the structural representation of ultrasonic transducer among the present invention.
Number in the figure explanation: 1. ball crown type rigid cage, 2. ultrasonic transducer, 3. bolt, 4. back shroud, 5. piezoelectric ceramic piece, 6. electrode slice, 7. horn, 8. ring flange, 9. swivel sleeve, 10. oscillating plate, 11. coupling layers.
The specific embodiment
Shown in Fig. 1-3, a kind of high-intensity focusing ultrasonic transducer array comprises a ball crown type rigid cage 1 and 37 sandwich ultrasonic transducers 2 that are connected on the ball crown type rigid cage 1.Each ultrasonic transducer 2 includes bolt 3, back shroud 4, piezoelectric ceramic piece 5, electrode slice 6, horn 7, swivel sleeve 9, oscillating plate 10 and is bonded in coupling layer 11 on the oscillating plate 10.Back shroud 4 and horn 7 connect clamping by back shroud 4, piezoelectric ceramic piece 5, electrode slice 6 and the horn 7 that bolt 3 will be set on the bolt 3 successively, have constituted the power conversion part of ultrasonic transducer 2.Swivel sleeve 9 is arranged on the front end of horn 7 by thread connection, and oscillating plate 10 is arranged on the front end of swivel sleeve 9 by welding, and coupling layer 11 is bonded in the front end of oscillating plate 10, and the material of coupling layer 11 is epoxy resin.Ultrasonic transducer 2 piezoelectric ceramics section diameter 12mm, piezoelectric ceramic piece 5 materials are PZT-8, be of a size of: Ф 12 * Ф 5 * 3mm, 7 sections diameter 7mm of horn, swivel sleeve 9 big end external diameter 14mm hold internal diameter 10mm greatly, and the transducer natural frequency is 40.5KHz, impedance is 43 ohm, and dynamic electric resistor is 16.5 ohm.
Radius of curvature R=the L1+L2+L3 of ball crown type rigid cage 1, wherein L1 is the focusing minimum-depth of this phased array, L2 is the axial scan scope of this phased array, the f value of ball crown type rigid cage 1 satisfies 0.70≤f value≤0.85, wherein the f value is the radius of curvature R of ball crown type rigid cage 1 and the ratio of spherical crown base diameter D, and L3 is the distance that coupling layer 11 arrives between the fixed flange 8 in the ultrasonic transducer 2.
Use screw by the ring flange 8 on the horn 7 ultrasonic transducer 2 and ball crown type rigid cage 1 to be linked together, the central authorities of ball crown type rigid cage 1 place a ultrasonic transducer 2 separately, all the other ultrasonic transducer 2 Discrete Distribution are on 4 layers of concentric ring centered by this ultrasonic transducer 2, ultrasonic transducer 2 centered by the ground floor, angular separation are 0 °; The second layer has 6 ultrasonic transducers 2, and angular separation is 60 °; The 3rd layer has 12 ultrasonic transducers 2, and angular separation is 30 °; The 4th layer has 18 transducers, and angular separation is 20 °.
In an embodiment of the present invention, the focusing minimum-depth L1=3.5cm of this array, axial scan range L 2=3.2cm, the coupling layer 11 of ultrasonic transducer 2 is to the distance L 3=2.5cm between the fixed flange 8, so radius of curvature R=L1+L2+L3=9.2cm of ball crown type rigid cage 1, the f value of ball crown type rigid cage 1 is taken as 0.8, its spherical crown base diameter D=11.5cm.
Each ultrasonic transducer 2 has independently electric excitation signal feeder line, is connected to the phased signal excitation system respectively.The excitation power supply signal frequency of the operating frequency of all ultrasonic transducers 2 and all ultrasonic transducers 2 is all identical, each excitation power supply signal is independent controlled, phase place and voltage amplitude have nothing in common with each other, by phase place and the voltage amplitude combination of calculating each ultrasonic transducer 2 based on the focus mode synthetic method of pseudo inverse matrix theory, the sound wave that ultrasonic transducer 2 is energized power supply excitation back radiation superposes in three dimensions, wave surface curvature and the center of sound wave are changed, realize electron focusing and the scanning of acoustic beam, produce required single focus or many focuses sound field control model, the Fast Heating that is applied to human body internal object tumor focus melts.
Claims (10)
1. high-intensity focusing ultrasonic transducer array is characterized in that: comprise a ball crown type rigid cage and several ultrasonic transducers, the ball crown type rigid cage is provided with several for the hole that ultrasonic transducers are installed; Ultrasonic transducer comprises bolt, back shroud, piezoelectric ceramic piece, electrode slice, horn, swivel sleeve, oscillating plate and is bonded in coupling layer on the oscillating plate, back shroud and horn connect clamping by back shroud, piezoelectric ceramic piece, electrode slice and the horn that bolt will be set on the bolt successively, swivel sleeve is arranged on the front end of horn, oscillating plate and be bonded in the front end that coupling layer on the oscillating plate is arranged on swivel sleeve; The central authorities of ball crown type rigid cage place a ultrasonic transducer separately, all the other ultrasonic transducer Discrete Distribution are on some layers of concentric ring centered by this ultrasonic transducer, angular separation between each circular layer is all unequal, interval between each circular layer reaches with the spacing of encircling interior adjacent ultrasonic transducer in 5mm, the initial ultrasonic transducers locations of every layer of concentric ring is decided at random, all the other ultrasonic transducers in succession by etc. angular separation closely be evenly distributed on the concentric ring, each ultrasonic transducer has independently electric excitation signal feeder line, is connected to the phased signal excitation system respectively.
2. high-intensity focusing ultrasonic transducer array according to claim 1, it is characterized in that: the radius of curvature R=L1+L2+L3 of described ball crown type rigid cage, wherein L1 is the focusing minimum-depth of this phased array, L2 is the axial scan scope of this phased array, L3 be in the ultrasonic transducer coupling layer to the distance between the fixed flange, the f value of ball crown type rigid cage satisfies 0.70≤f value≤0.85, and wherein the f value is the radius of curvature R of rigid cage spherical crown and the ratio of spherical crown base diameter D.
3. high-intensity focusing ultrasonic transducer array according to claim 1, it is characterized in that: the excitation power supply signal frequency of the operating frequency of all ultrasonic transducers and all ultrasonic transducers is all identical, each excitation power supply signal is independent controlled, phase place and voltage amplitude have nothing in common with each other, by calculate phase place and the voltage amplitude combination of array element based on the focus mode synthetic method of pseudo inverse matrix theory, realize electron focusing and the scanning of acoustic beam, produce required single focus or many focuses sound field control model.
4. according to the high-intensity focusing ultrasonic transducer array of claim 1-3, it is characterized in that: the swivel sleeve of described ultrasonic transducer and horn manufacture an one-piece parts.
5. according to the high-intensity focusing ultrasonic transducer array of claim 1-3, it is characterized in that: the swivel sleeve of described ultrasonic transducer is welded on the front end of horn.
6. according to the high-intensity focusing ultrasonic transducer array of claim 1-3, it is characterized in that: the swivel sleeve of described ultrasonic transducer is by the front end of thread connection in horn.
7. according to the described high-intensity focusing ultrasonic transducer array of claim 1-3, it is characterized in that: the oscillating plate of described ultrasonic transducer is bonded in the front end of swivel sleeve.
8. according to the described high-intensity focusing ultrasonic transducer array of claim 1-3, it is characterized in that: the oscillating plate of described ultrasonic transducer is welded on the front end of swivel sleeve.
9. according to the described high-intensity focusing ultrasonic transducer array of claim 1-3, it is characterized in that: the material of the coupling layer of described ultrasonic transducer is foam plastics.
10. according to the described high-intensity focusing ultrasonic transducer array of claim 1-3, it is characterized in that: the material of the coupling layer of described ultrasonic transducer is epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310312076.3A CN103341241B (en) | 2013-07-24 | 2013-07-24 | A kind of high-intensity focusing ultrasonic transducer array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310312076.3A CN103341241B (en) | 2013-07-24 | 2013-07-24 | A kind of high-intensity focusing ultrasonic transducer array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103341241A true CN103341241A (en) | 2013-10-09 |
| CN103341241B CN103341241B (en) | 2016-01-20 |
Family
ID=49276098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310312076.3A Expired - Fee Related CN103341241B (en) | 2013-07-24 | 2013-07-24 | A kind of high-intensity focusing ultrasonic transducer array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103341241B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754820A (en) * | 2013-12-27 | 2014-04-30 | 浙江大学 | Ultrasonic transducer ring array based sound field synthesis and parallel operation device |
| CN106076450A (en) * | 2016-06-03 | 2016-11-09 | 杭州电子科技大学 | A kind of particle suspension dynamic focusing heating system and heating means thereof |
| CN109031318A (en) * | 2018-06-05 | 2018-12-18 | 中国计量大学 | Submarine target acoustic imaging method based on spheric array |
| CN109431544A (en) * | 2018-12-24 | 2019-03-08 | 深圳先进技术研究院 | Sound field fusing device |
| CN112967709A (en) * | 2021-02-20 | 2021-06-15 | 河北工业大学 | Phase control method based on lossless cranial nerve stimulation focusing sound field |
| CN115821000A (en) * | 2022-11-21 | 2023-03-21 | 西北工业大学 | Phased array based focused ultrasonic cavitation shot blasting device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775327A (en) * | 2005-12-01 | 2006-05-24 | 上海交通大学 | Wide focal domain phased array focusing ultrasonic transducer |
| CN101828960A (en) * | 2010-05-07 | 2010-09-15 | 上海交通大学 | High-intensity focused ultrasound spherical phased array with array elements annually and intensively distributed |
| WO2011015949A1 (en) * | 2009-08-04 | 2011-02-10 | Insightec Ltd. | Estimation of alignment parameters in magnetic-resonance-guided ultrasound focusing |
| CN203342224U (en) * | 2013-07-24 | 2013-12-18 | 苏州科技学院 | High-intensity focused ultrasonic transducer array |
-
2013
- 2013-07-24 CN CN201310312076.3A patent/CN103341241B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775327A (en) * | 2005-12-01 | 2006-05-24 | 上海交通大学 | Wide focal domain phased array focusing ultrasonic transducer |
| WO2011015949A1 (en) * | 2009-08-04 | 2011-02-10 | Insightec Ltd. | Estimation of alignment parameters in magnetic-resonance-guided ultrasound focusing |
| CN101828960A (en) * | 2010-05-07 | 2010-09-15 | 上海交通大学 | High-intensity focused ultrasound spherical phased array with array elements annually and intensively distributed |
| CN203342224U (en) * | 2013-07-24 | 2013-12-18 | 苏州科技学院 | High-intensity focused ultrasonic transducer array |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754820A (en) * | 2013-12-27 | 2014-04-30 | 浙江大学 | Ultrasonic transducer ring array based sound field synthesis and parallel operation device |
| CN103754820B (en) * | 2013-12-27 | 2015-11-25 | 浙江大学 | Based on sound field synthesis and the parallel operation device of ultrasonic transducer annular array |
| CN106076450A (en) * | 2016-06-03 | 2016-11-09 | 杭州电子科技大学 | A kind of particle suspension dynamic focusing heating system and heating means thereof |
| CN106076450B (en) * | 2016-06-03 | 2018-07-20 | 杭州电子科技大学 | A kind of particle suspension dynamic focusing heating system and its heating means |
| CN109031318A (en) * | 2018-06-05 | 2018-12-18 | 中国计量大学 | Submarine target acoustic imaging method based on spheric array |
| CN109431544A (en) * | 2018-12-24 | 2019-03-08 | 深圳先进技术研究院 | Sound field fusing device |
| CN112967709A (en) * | 2021-02-20 | 2021-06-15 | 河北工业大学 | Phase control method based on lossless cranial nerve stimulation focusing sound field |
| CN112967709B (en) * | 2021-02-20 | 2022-11-25 | 河北工业大学 | Phase control method based on lossless cranial nerve stimulation focusing sound field |
| CN115821000A (en) * | 2022-11-21 | 2023-03-21 | 西北工业大学 | Phased array based focused ultrasonic cavitation shot blasting device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103341241B (en) | 2016-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103341241B (en) | A kind of high-intensity focusing ultrasonic transducer array | |
| US8162858B2 (en) | Ultrasonic medical treatment device with variable focal zone | |
| US6506154B1 (en) | Systems and methods for controlling a phased array focused ultrasound system | |
| US5080102A (en) | Examining, localizing and treatment with ultrasound | |
| CN101190436B (en) | Phase control focusing ultrasound wave source device | |
| US9852727B2 (en) | Multi-segment ultrasound transducers | |
| US9387515B2 (en) | Impedance matching for ultrasound phased array elements | |
| KR100798480B1 (en) | Apparatus using focused ultrasound wave by controlling electronic signals | |
| US20120143100A1 (en) | Extended depth-of-focus high intensity ultrasonic transducer | |
| Song et al. | Feasibility of using lateral mode coupling method for a large scale ultrasound phased array for noninvasive transcranial therapy | |
| CN101828960B (en) | High-intensity focused ultrasound spherical phased array with array elements annually and intensively distributed | |
| CN203342224U (en) | High-intensity focused ultrasonic transducer array | |
| WO2019135160A2 (en) | Multi-frequency ultrasound transducers | |
| CN100540089C (en) | Wide focal domain phased array focusing ultrasonic transducer | |
| US20220218308A1 (en) | Ultrasonic transducer | |
| US8226538B2 (en) | Biomedical used multiple-channel hemispherical focused ultrasound phased array apparatus | |
| US8888706B2 (en) | Dual-curvature phased array high-intensity focused ultrasound transducer for tumor therapy | |
| Benedict et al. | Time reversal beamforming for powering ultrasonic implants | |
| Fleury et al. | New piezocomposite transducers for therapeutic ultrasound | |
| EP3912571A1 (en) | Ultrasonic transducer | |
| Song et al. | Large improvement of the electrical impedance of imaging and high-intensity focused ultrasound (HIFU) phased arrays using multilayer piezoelectric ceramics coupled in lateral mode | |
| CN100586508C (en) | Phase control focusing ultrasonic transducer array with high intensity | |
| KR102383268B1 (en) | Transducer of integrated type which generates complex ultrasonic sound | |
| JP2012239791A (en) | Focused sonic therapeutic apparatus | |
| CN204522037U (en) | A kind of matrix probe for ultrasonic physiotherapy table |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20180724 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |