CN113414089A - Non-focusing type sound field enhancing transducer - Google Patents
Non-focusing type sound field enhancing transducer Download PDFInfo
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- CN113414089A CN113414089A CN202110711455.4A CN202110711455A CN113414089A CN 113414089 A CN113414089 A CN 113414089A CN 202110711455 A CN202110711455 A CN 202110711455A CN 113414089 A CN113414089 A CN 113414089A
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- 230000002708 enhancing effect Effects 0.000 title claims abstract description 25
- 230000005855 radiation Effects 0.000 abstract description 17
- 238000011282 treatment Methods 0.000 abstract description 12
- 238000002560 therapeutic procedure Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 53
- 238000010586 diagram Methods 0.000 description 8
- 238000004088 simulation Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000011298 ablation treatment Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000010317 ablation therapy Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
Abstract
The invention discloses a non-focusing type sound field enhancing transducer, which comprises 3 transducers arranged in a star shape: a first transducer, a second transducer, and a third transducer; the included angle between the first transducer and the second transducer is theta 1, the included angle between the second transducer and the third transducer is theta 2, the included angle between the first transducer and the third transducer is theta 3, and the theta 1, the theta 2 and the theta 3 are all 15-165 degrees. According to the invention, an enhanced sound field is obtained by superposing three transducers, and the spatial position of the spatial superposed sound field can be adjusted by changing the spatial angle of the transducers; the three transducers are used for combination of single-sided emission and double-sided emission, so that the purpose of controlling the radiation direction of a sound field can be realized, and the action range of the sound field can be enlarged to be applied to specific treatment occasions; by configuring the frequencies of the three transducers, three spatial distribution enhanced mixed sound fields can be obtained; the whole size of the invention can realize miniaturization and can be used for tissue interventional therapy.
Description
Technical Field
The invention relates to the technical field of ultrasonic transducers, in particular to a non-focusing type sound field enhancing transducer.
Background
The ultrasonic transducer is a core device of medical ultrasonic diagnosis and treatment equipment, most of the transducers for ablation treatment clinically by utilizing an ultrasonic mechanical effect, a thermal effect and a physicochemical effect at present are focusing transducers, and the radiation energy of the transducers is concentrated by a concave structure design or a method of adding an acoustic lens, so that the ultrasonic energy at a certain position in space is enhanced; however, the transducer used for ablation therapy is usually a low-frequency transducer, and the design of the focusing transducer is large in size and heavy, for example, the diameter of a 1MHz HIFU ultrasonic probe is about 7cm, which cannot meet the clinical requirements of interventional therapy field requiring the overall size to be 2mm or even 1mm, and the requirements of tiny, light and wearable medical equipment; in addition, the focused ultrasound probe focuses energy into a specific small region, which is difficult to radiate a large region, and cannot meet certain specific large-area ultrasound radiation therapy scenes. The single-array-element high-frequency ultrasonic transducer is small in size, can be sent to a target area through an interventional catheter and directly acts on target tissues, but the high-frequency ultrasonic transducer is small in size, is difficult to radiate strong ultrasonic energy and cannot reach an energy threshold required by ablation tissues.
In order to meet the requirements of clinical interventional ablation treatment and external wearable medical ultrasonic equipment on high radiation energy of a tiny transducer, the invention provides and designs a technical scheme for forming radiation sound fields to be mutually superposed and enhanced through a certain angle based on a plurality of ultrasonic transducers.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an unfocused sound field enhancing transducer, which addresses the above-mentioned deficiencies in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: an unfocused sound field enhancing transducer comprising 3 transducers in a star arrangement: a first transducer, a second transducer, and a third transducer;
the included angle between the first transducer and the second transducer is theta 1, the included angle between the second transducer and the third transducer is theta 2, the included angle between the first transducer and the third transducer is theta 3, the included angle between the theta 1, the theta 2 and the theta 3 are all 15-165 degrees, and the theta 1+ theta 2+ theta 3 is 360 degrees.
The first transducer, the second transducer and the third transducer are arranged at a certain angle, the intersection of the radiation directions between the two transducers is enhanced due to the superposition of sound fields (namely, a sound field enhancement area), and the spatial position of the spatially superposed sound fields (namely, the sound field enhancement area) can be adjusted by changing the spatial angle between the transducers.
Preferably, the first transducer, the second transducer and the third transducer may each be single-or double-sided emitting transducers. The three transducers are used for combination of single-sided emission and double-sided emission, so that the purpose of controlling the radiation direction of a sound field can be realized, and the ultrasonic therapeutic device can be applied to specific therapeutic occasions. For example, when the first transducer, the second transducer and the third transducer are all double-sided, then the sound field enhancement regions can be obtained in three regions between every two of the three transducers. At the moment, the purpose of enhancing the sound field is achieved, the action range of the sound field is enlarged, and three spatial distribution enhanced sound fields with mutually vertical radiation directions can be obtained.
Preferably, the first transducer comprises a first active layer, the second transducer comprises a second active layer and the third transducer comprises a third active layer.
Preferably, the front surface of the first working layer is further provided with a first matching layer.
Preferably, the back side of the first working layer is further provided with a first backing layer.
Preferably, the front surface of the second working layer is further provided with a second matching layer.
Preferably, the back of the second working layer is also provided with a second backing layer.
Preferably, the front surface of the third working layer is further provided with a third matching layer.
Preferably, the back of the third working layer is also provided with a third backing layer.
Preferably, the center frequencies of the first transducer, the second transducer and the third transducer are respectively f1, f2 and f3, and the center frequencies of f1, f2 and f3 are all 1-30 MHz. And f1, f2, f3 can be equal or unequal, when f1, f2, f3 are different, can obtain the enhancement mixing sound field in the sound field overlapping area, can apply to the mixing intervention ablation treatment of different depth, the low frequency can obtain the higher depth of penetration, it is effectual to the deep tissue; the high-low frequency superposition area can obtain better treatment effect.
Preferably, θ 1, θ 2, and θ 3 are all 120 °.
Preferably, the materials of the first, second and third working layers may be piezoelectric ceramics, piezoelectric composites, piezoelectric single crystals or thin film materials.
Preferably, the first, second and third matching layers may each be a multilayer matching structure.
Preferably, the first, second and third backing layers may each be corrugated or slanted.
The invention has the beneficial effects that: according to the unfocused sound field enhancement transducer, an enhanced sound field is obtained by superposing the three transducers, and the spatial position of the spatially superposed sound field can be adjusted by changing the spatial angle of the transducers; the three transducers are used for combination of single-sided emission and double-sided emission, so that the purpose of controlling the radiation direction of a sound field can be realized, and the action range of the sound field can be enlarged to be applied to specific treatment occasions; by configuring the frequencies of the three transducers, three spatial distribution enhanced frequency mixing sound fields can be obtained, the frequency mixing sound field can be applied to frequency mixing interventional ablation treatment at different depths, and better treatment effects can be obtained by combining the respective advantages of low frequency and high frequency; the three transducers are small in size, so that the whole size of the ultrasonic interventional device can be miniaturized, compared with the traditional focusing transducer, the ultrasonic interventional device can greatly reduce the whole size, and meanwhile, ultrasonic energy meeting the treatment intensity can be provided, so that the ultrasonic interventional device can be used for tissue interventional treatment.
Drawings
Fig. 1 is a schematic structural diagram of an unfocused sound field enhancement transducer in embodiment 1 of the present invention (the left side is a top view, and the right side is a perspective view);
fig. 2 is a graph showing simulation results of spatial absolute sound pressure distribution of the unfocused sound field enhancing transducer in embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of an unfocused sound field enhancement transducer in embodiment 2 of the present invention (the left side is a top view, and the right side is a perspective view);
fig. 4 is a graph showing simulation results of spatial absolute sound pressure distribution of the unfocused sound field enhancing transducer in embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram of an unfocused sound field enhancement transducer in embodiment 3 of the present invention (the left side is a top view, and the right side is a perspective view);
fig. 6 is a graph showing simulation results of spatial absolute sound pressure distribution of the unfocused sound field enhancing transducer in embodiment 3 of the present invention;
fig. 7 is a schematic structural diagram of an unfocused sound field enhancement transducer in embodiment 4 of the present invention (the left side is a top view, and the right side is a perspective view);
fig. 8 is a graph showing simulation results of spatial absolute sound pressure distribution of the unfocused sound field enhancing transducer in embodiment 4 of the present invention;
fig. 9 is a schematic structural view of an unfocused sound field enhancing transducer in embodiment 5 of the present invention;
description of reference numerals:
1-a first transducer; 2-a second transducer; 3-a third transducer; 11 — first matching layer; 12 — a first working layer; 13 — a first backing layer; 21 — a second matching layer; 22 — second working layer; 23 — a second backing layer; 31 — third matching layer; 32-a third working layer; 33 — third backing layer.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1
As shown in fig. 1, an unfocused sound field enhancing transducer of the present embodiment includes 3 transducers arranged in a star shape (top view on the left side of fig. 1): a first transducer 1, a second transducer 2 and a third transducer 3;
the first transducer 1 comprises a first active layer 12, a first matching layer 11 arranged on the front side of the first active layer 12 and a first backing layer 13 arranged on the back side of the first active layer 12; the second transducer 2 comprises a second working layer 22, a second matching layer 21 arranged on the front side of the second working layer 22 and a second backing layer 23 arranged on the back side of the second working layer 22; the third transducer 3 comprises a third active layer 32, a third matching layer 31 arranged on the front side of the third active layer 32 and a third backing layer 33 arranged on the back side of the third active layer 32.
Wherein, the materials of the first, the second and the third working layers (12, 22, 32) can be piezoelectric ceramics, piezoelectric composite materials, piezoelectric single crystals or thin film materials. The first, second and third working layers (12, 22, 32) may each be a single working layer structure or a multi-working layer structure.
The first, second and third matching layers (11, 21, 31) may be of a single-layer matching structure or a multi-layer matching structure.
Wherein the first, second and third backing layers (13, 23, 33) may each be corrugated or slanted.
The included angle between the first transducer 1 and the second transducer 2 is theta 1, the included angle between the second transducer 2 and the third transducer 3 is theta 2, the included angle between the first transducer 1 and the third transducer 3 is theta 3, the theta 1, the theta 2 and the theta 3 are all 15-165 degrees, and the theta 1+ theta 2+ theta 3 is 360 degrees.
The center frequencies of the first transducer 1, the second transducer 2 and the third transducer 3 are respectively f1, f2 and f3, and the center frequencies of f1, f2 and f3 are all 1-30 MHz.
In this embodiment, the first transducer 1, the second transducer 2, and the third transducer 3 all emit signals having a weakly scattering sound field in a unidirectional emission manner and facing away from each other, a spatial sound field obtains superposition enhancement at a crossing of the radiation directions of the first transducer 1 and the second transducer 2, and obtains superposition enhancement at a crossing of the radiation directions of the second transducer 2 facing away from each other and the third transducer 3 facing forward. By changing the transducer spatial angle, the spatial position of the spatially superimposed sound field can be adjusted.
In a further preferred embodiment, θ 1, θ 2, and θ 3 are all 120 °, and the frequencies of the three transducers are all the same; fig. 2 is a diagram showing a simulation result of spatial absolute sound pressure distribution in the present embodiment.
It is to be understood that wherein
Example 2
This example is largely the same as example 1, and only the differences will be described below.
Referring to fig. 3, the difference between the present embodiment and embodiment 1 is mainly that: none of the first transducer 1, the second transducer 2 and the third transducer 3 comprises a backing layer. In this embodiment, the first transducer 1, the second transducer 2, and the third transducer 3 are all unidirectionally emitted, and there are scattered sound field signals in the back direction, and the spatial sound field is superimposed and enhanced at the intersection of the radiation directions of the first transducer 1 and the second transducer 2, and is superimposed and enhanced at the intersection of the radiation directions of the second transducer 2 in the back direction and the third transducer 3 in the front direction. In a further preferred embodiment, θ is 120 °, the center frequencies of the first transducer 1, the second transducer 2 and the third transducer 3 are all the same; fig. 4 is a diagram showing a simulation result of spatial absolute sound pressure distribution in the present embodiment.
Example 3
This example is largely the same as example 1, and only the differences will be described below.
Referring to fig. 5, the difference between the present embodiment and embodiment 1 is mainly that: the first transducer 1, the second transducer 2 and the third transducer 3 do not comprise a backing layer and a matching layer, i.e. each has only a working layer. In this embodiment, the first transducer 1, the second transducer 2, and the third transducer 3 all emit sound field signals in two directions, and a spatial sound field is superimposed and enhanced at the intersection of the radiation directions of the three transducers, so that this embodiment can simultaneously play a role in enhancing the sound field at three locations, and can obtain three spatial distribution enhanced sound fields with included angles of the radiation directions of θ. In a further preferred embodiment, θ is 120 °, the center frequencies of the first transducer 1, the second transducer 2 and the third transducer 3 are all the same; fig. 6 is a diagram showing a simulation result of spatial absolute sound pressure distribution in the present embodiment.
Example 4
This example is largely the same as example 3, and only the differences will be described below.
Referring to fig. 7, the difference between the present embodiment and embodiment 1 is mainly that: the center frequencies of the first, second and third transducers 3 are f1, f2, f3, respectively, and f1, f2, f3 are not the same at the same time. In this embodiment, the first transducer 1, the second transducer 2, and the third transducer 3 all emit sound field signals in two directions, and the spatial sound field obtains superposition enhancement at the intersection of the radiation directions of the first transducer 1, the second transducer 2, and the third transducer 3, and this embodiment can simultaneously play a role of enhancing the mixing sound field at three locations, and can obtain three spatial distribution enhanced mixing sound fields with included angles of radiation directions of θ, and can be applied to mixing interventional ablation treatments at different depths, and the low frequency can obtain a higher penetration depth, acting on deep tissues, and the high-low frequency superposition region can obtain a better treatment effect. In a further preferred embodiment, θ is 120 °; fig. 8 is a diagram showing a simulation result of spatial absolute sound pressure distribution in the present embodiment.
Example 5
In this embodiment, 1 of the 3 transducers further has an imaging function, and referring to fig. 9, the first transducer 1 and the second transducer 2 obtain a superimposed enhanced sound field at the intersection of the lower radiation direction, and the third transducer 3 has an imaging function, so that when in use, the enhanced sound field obtained by the first transducer 1 and the second transducer 2 is used for treatment, and then the treatment site is imaged by rotating 180 ° and using the third transducer 3 in combination with a necessary external ultrasonic imaging device, so that the treatment effect of the treatment site can be observed in real time.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (10)
1. An unfocused sound field enhancing transducer comprising 3 transducers in a star arrangement: a first transducer, a second transducer, and a third transducer;
the included angle between the first transducer and the second transducer is theta 1, the included angle between the second transducer and the third transducer is theta 2, the included angle between the first transducer and the third transducer is theta 3, the included angle between the theta 1, the theta 2 and the theta 3 are all 15-165 degrees, and the theta 1+ theta 2+ theta 3 is 360 degrees.
2. The unfocused sound field enhancing transducer of claim 1, wherein the first transducer comprises a first working layer, the second transducer comprises a second working layer, and the third transducer comprises a third working layer.
3. The unfocused sound field enhancing transducer of claim 2, wherein the front face of the first working layer is further provided with a first matching layer.
4. The unfocused sound field enhancing transducer of claim 2 or 3, wherein a back side of the first working layer is further provided with a first backing layer.
5. The unfocused sound field enhancing transducer of claim 2, wherein the front face of the second working layer is further provided with a second matching layer.
6. The unfocused sound field enhancing transducer of claim 2 or 5, wherein a second backing layer is further provided on a back side of the second working layer.
7. The unfocused sound field enhancing transducer of claim 2, wherein a front face of the third working layer is further provided with a third matching layer.
8. The unfocused sound field enhancing transducer of claim 2 or 7, wherein a third backing layer is further provided on a back side of the third working layer.
9. The unfocused sound field enhancing transducer of claim 2, wherein the first, second and third transducers have center frequencies f1, f2, f3, and f1, f2, f3 are all between 1-30 MHz.
10. The unfocused sound field enhancing transducer of claim 2, wherein θ 1, θ 2, and θ 3 are all 120 °.
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| CN202110711455.4A CN113414089B (en) | 2021-06-25 | 2021-06-25 | Non-focusing sound field enhanced transducer |
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| CN202110711455.4A CN113414089B (en) | 2021-06-25 | 2021-06-25 | Non-focusing sound field enhanced transducer |
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| CN113414089A true CN113414089A (en) | 2021-09-21 |
| CN113414089B CN113414089B (en) | 2023-07-07 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553091A (en) * | 2010-12-14 | 2012-07-11 | 财团法人工业技术研究院 | Ultrasonic transducer probe |
| CN105944947A (en) * | 2016-06-29 | 2016-09-21 | 北京工业大学 | Coaxial dual-arc-surface non-through type gas based line focusing air coupling sensor |
| CN107755230A (en) * | 2017-11-16 | 2018-03-06 | 中国计量大学 | The controllable high power altrasonic transducer of sound field |
| US20190053821A1 (en) * | 2016-02-23 | 2019-02-21 | Koninklijke Philips N.V. | Ultrasound ablation device |
| CN109925615A (en) * | 2017-12-18 | 2019-06-25 | 深圳先进技术研究院 | A kind of compatible brain ultrasound stimulation device of magnetic and its manufacturing method |
| US20200178803A1 (en) * | 2016-07-08 | 2020-06-11 | Insightec, Ltd. | Systems and methods for ensuring coherence between multiple ultrasound transducer arrays |
-
2021
- 2021-06-25 CN CN202110711455.4A patent/CN113414089B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553091A (en) * | 2010-12-14 | 2012-07-11 | 财团法人工业技术研究院 | Ultrasonic transducer probe |
| US20190053821A1 (en) * | 2016-02-23 | 2019-02-21 | Koninklijke Philips N.V. | Ultrasound ablation device |
| CN105944947A (en) * | 2016-06-29 | 2016-09-21 | 北京工业大学 | Coaxial dual-arc-surface non-through type gas based line focusing air coupling sensor |
| US20200178803A1 (en) * | 2016-07-08 | 2020-06-11 | Insightec, Ltd. | Systems and methods for ensuring coherence between multiple ultrasound transducer arrays |
| CN107755230A (en) * | 2017-11-16 | 2018-03-06 | 中国计量大学 | The controllable high power altrasonic transducer of sound field |
| CN109925615A (en) * | 2017-12-18 | 2019-06-25 | 深圳先进技术研究院 | A kind of compatible brain ultrasound stimulation device of magnetic and its manufacturing method |
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