WO2008011759A1 - An ultrasound phase-control focusing transducer based on spherical lens - Google Patents
An ultrasound phase-control focusing transducer based on spherical lens Download PDFInfo
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- WO2008011759A1 WO2008011759A1 PCT/CN2006/001805 CN2006001805W WO2008011759A1 WO 2008011759 A1 WO2008011759 A1 WO 2008011759A1 CN 2006001805 W CN2006001805 W CN 2006001805W WO 2008011759 A1 WO2008011759 A1 WO 2008011759A1
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- acoustic lens
- focusing transducer
- lens
- acoustic
- ultrasonic
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- 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
- This invention relates to ultrasonic transducers, and more particularly to ultrasonic phased focus transducers, such as medical ultrasonic phased focus transducers. Background technique
- a conventional ultrasonic phase-controlled focusing transducer includes an array of a plurality of ultrasonic transducers for focusing a sound beam by controlling a driving signal of a piezoelectric crystal (piezoelectric ceramic sheet) of each of the transducers. purpose.
- Such a conventional ultrasonic phase-controlled focusing transducer first requires a relatively complicated electronic driving control circuit; in addition, in order to ensure a sufficient three-dimensional spatial range of focus, it is required that each piezoelectric ceramic piece emits a sound field range sufficiently large, however, For a piezoelectric ceramic sheet, to increase its sound field emission range, its size must be reduced. As the size is reduced, not only processing is difficult, but also sufficient emission intensity is not easily achieved. Summary of the invention
- Another object of the present invention is to provide an ultrasonic phased focus transducer capable of ensuring a sufficient range of three-dimensional movement of the focus.
- the ultrasonic phase-controlled focus transducer of the present invention includes (the following sections basically copy the claims, first vacant, etc., after the claims are revised) BRIEF DESCRIPTION OF THE DRAWINGS
- Figure 1 illustrates a spherical convex lens based ultrasound focus transducer in accordance with one embodiment of the present invention
- Figure 2 shows the mechanical dimensions of the spherical convex lens of Figure 1.
- the piezoelectric crystal material used in the ultrasonic transducer of the present invention is, for example, a conventional circular piezoelectric ceramic sheet 1.
- an acoustic lens is bonded to the circular piezoelectric ceramic sheet.
- the acoustic lens is a spherical convex lens 2 (see Fig. 1).
- the spherical convex lens 2 can be made of a metal material such as aluminum or copper, an alloy material, or the like, or can be made of an organic glass material or an epoxy resin material.
- the spherical convex lens 2 is bonded to the piezoelectric ceramic sheet 1 through a bonding layer 3, and the material of the bonding layer may include various materials for coupling acoustic waves into the metal spherical convex lens, such as a resin bonding material, etc. Add an appropriate amount of metal powder (such as tungsten powder) to improve acoustic impedance matching.
- metal powder such as tungsten powder
- the ultrasonic waves emitted from the piezoelectric ceramic sheets are then focused by controlling the driving signals to form a complete ultrasonic (phase-controlled) focusing transducer.
- a large sound field emission range is ensured while ensuring high emission intensity.
- For a traditional piezoelectric ceramic sheet to increase its sound field emission range, its size must be reduced. The small size means that it is not easy to achieve sufficient emission intensity, and at the same time increases the difficulty of processing.
- the sound field emission range and the high emission intensity are ensured, and the processing cost is reduced.
- Figure 2 shows the mechanical dimensions of the spherical convex lens of Figure 1. among them:
- ⁇ 1 Diameter of the piezoelectric ceramic piece.
- the opening angle of the spherical piece, its size is related to the sound field emission range required by the system. The larger the sound field emission range, the larger a.
- HI The height of the entire acoustic lens.
- H2 The height of the cylinder in the acoustic lens.
- SR1 The spherical radius of the acoustic lens.
- the illustrated ultrasonic focusing transducer comprises a piezoelectric ceramic sheet
- the illustrated acoustic lens preferably comprises an integral cylindrical body and a convex spherical body. Therefore, the sound waves emitted from the piezoelectric ceramic sheets are "refracted" by the convex spheres of the same material after passing through the cylinder, thereby avoiding the adverse effect of the bonding interface on the sound waves.
- the acoustic lens may also comprise only convex lenses composed of convex spheres.
- the ultrasonic focusing transducer may comprise an array of a plurality of piezoelectric ceramic sheets, while simultaneously covering an entire transmitting surface with an acoustic lens.
- the array emission phase control and the acoustic lens focus control can be simultaneously used, and the phase control emission is simultaneously achieved, and the sound field emission range and intensity are increased.
- the acoustic lens shown is a convex lens having a circular spherical surface.
- the acoustic lens can be designed to include a non-circular or non-spherical surface, even a complex curved surface, similar to the effect of the optical lens on the beam, on the beam Focusing compensates or corrects the "acoustic aberration".
- the acoustic lens may include more than one through The mirror, but a combined lens comprising a plurality of lenses (for example, a plurality of concave and convex lenses with appropriate acoustic bonding), further achieves precise control of the focus.
- the spherical convex lens-based ultrasonic focusing transducer of the present invention can be used in various ultrasonic instruments.
- various medical ultrasonic scanners ultrasonic probes in the probe.
- ultrasonic probes in the probe Especially used in high intensity focused ultrasound (HIFLJ) therapeutic apparatus.
- HIFLJ high intensity focused ultrasound
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- Acoustics & Sound (AREA)
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- Transducers For Ultrasonic Waves (AREA)
Abstract
An ultrasound transducer that comprises a circular piezoelectric ceramic on which there is bonded a spherical lens made of metal materials or alloy materials such as alumina or copper. The spherical lens is bonded with the piezoelectric ceramic through a bonding layer. Because the spherical lens could make sound wave emanative, and the ultrasound wave emitted from the piezoelectric ceramic could be focused by controling a driving signal, an integrated ultrasound (phase-control) focusing transducer could be made up of.
Description
基于球面凸透镜的 Spherical convex lens based
超声相控聚焦换能器 技术领域 Ultrasonic phased focus transducer
本发明涉及超声波换能器， 尤其涉及超声波相控聚焦换能 器， 例如医用超声波相控聚焦换能器。 背景技术 Field of the Invention This invention relates to ultrasonic transducers, and more particularly to ultrasonic phased focus transducers, such as medical ultrasonic phased focus transducers. Background technique
目前， 聚焦超声治疗装置是国内外医疗研究的热点之一， 临 床应用已获得很好的效果，它应用高强聚焦超声（HIFU)在人 (动物) 体内产生高温用以灭杀疗区的病变组织。 传统的超声相控聚焦换 能器包括多个超声换能器組成的阵列， 通过控制其中每一个换能 器的压电晶体（压电陶瓷片） 的驱动信号 ¾位而达到将声束聚焦 的目的。 这种传统的超声相控聚焦换能器首先需要较复杂的电子 驱动控制电路； 此外， 为了保证足够的焦点三维空间移动范围， 要求每一个压电陶瓷片发射出的声场范围足够大， 但是， 对于压 电陶瓷片来说， 要增加它的声场发射范围， 必须减小它的尺寸。 随着尺寸的減小， 不但加工困难， 而且也不容易达到足够的发射 强度。 发明内容 At present, focused ultrasound therapy is one of the hotspots of medical research at home and abroad. Clinical application has achieved good results. It uses high-intensity focused ultrasound (HIFU) to generate high temperature in human (animal) to destroy the diseased tissue in the treatment area. . A conventional ultrasonic phase-controlled focusing transducer includes an array of a plurality of ultrasonic transducers for focusing a sound beam by controlling a driving signal of a piezoelectric crystal (piezoelectric ceramic sheet) of each of the transducers. purpose. Such a conventional ultrasonic phase-controlled focusing transducer first requires a relatively complicated electronic driving control circuit; in addition, in order to ensure a sufficient three-dimensional spatial range of focus, it is required that each piezoelectric ceramic piece emits a sound field range sufficiently large, however, For a piezoelectric ceramic sheet, to increase its sound field emission range, its size must be reduced. As the size is reduced, not only processing is difficult, but also sufficient emission intensity is not easily achieved. Summary of the invention
本发明的另一个目的是提出一种能够保证足够的焦点三维 空间移动范围的超声相控聚焦换能器。 Another object of the present invention is to provide an ultrasonic phased focus transducer capable of ensuring a sufficient range of three-dimensional movement of the focus.
本发明的再一个目的是提出一种能够 证足够的发射强度 而又加工筒单的超声相控聚焦换能器。 - 为此，本发明的超声相控聚焦换能器包括 （以下部分基 本照抄权利要求书， 先暂时空缺， 等权利要求书订稿后再补上）
附图说明 . It is yet another object of the present invention to provide an ultrasonic phased focus transducer that is capable of demonstrating sufficient emission intensity while processing the cartridge. - To this end, the ultrasonic phase-controlled focus transducer of the present invention includes (the following sections basically copy the claims, first vacant, etc., after the claims are revised) BRIEF DESCRIPTION OF THE DRAWINGS
图 1示出根据本发明的一个实施例，基于球面凸透镜的超声 聚焦换能器； Figure 1 illustrates a spherical convex lens based ultrasound focus transducer in accordance with one embodiment of the present invention;
图 2示出了图 1中的球面凸透镜的机械尺寸。 具体实施方式 Figure 2 shows the mechanical dimensions of the spherical convex lens of Figure 1. detailed description
以下通过一个典型的实施例介绍本发明的技术方案，但本发 明的具体实施方式不受此实施例限制。 本领域技术人员通过学习 和理解该实施例， 可以预见和构造出其它具体形式的技术方案而 仍包含在本发明请求保护的范围中。 The technical solutions of the present invention are described below by way of a typical embodiment, but the specific embodiments of the present invention are not limited by the embodiments. Other specific forms of technical solutions can be foreseen and constructed by those skilled in the art from the understanding and understanding of the embodiments.
在一个实施例中，本发明的超声换能器采用的压电晶体材料 例如为普通的圆形压电陶瓷片 1。 与传统的^声换能器不同的是， 在该圆形压电陶瓷片上面粘接一个声透镜， ^所示出的实施例中， 声透镜为球面凸透镜 2 (见图 1 ) 。 In one embodiment, the piezoelectric crystal material used in the ultrasonic transducer of the present invention is, for example, a conventional circular piezoelectric ceramic sheet 1. Unlike a conventional acoustic transducer, an acoustic lens is bonded to the circular piezoelectric ceramic sheet. In the illustrated embodiment, the acoustic lens is a spherical convex lens 2 (see Fig. 1).
球面凸透镜 2可以用铝、 铜等金属材料或合金材料等制作， 也可以用有机玻璃材料、 环氧树脂材料等制造。 The spherical convex lens 2 can be made of a metal material such as aluminum or copper, an alloy material, or the like, or can be made of an organic glass material or an epoxy resin material.
球面凸透镜 2通过一个粘接层 3与压电陶瓷片 1相粘接， 粘 接层的材料可以包括将声波耦合进金属球面凸透镜的各种材料， 如树脂粘合材料等， 粘合材料中可以添加适量的金属粉（比如钨 粉） ， 以提高声阻抗匹配性能。 The spherical convex lens 2 is bonded to the piezoelectric ceramic sheet 1 through a bonding layer 3, and the material of the bonding layer may include various materials for coupling acoustic waves into the metal spherical convex lens, such as a resin bonding material, etc. Add an appropriate amount of metal powder (such as tungsten powder) to improve acoustic impedance matching.
由于球面凸透镜具有使声波发散的效果， 然后通过控制驱动 信号使压电陶瓷片发出的超声波聚焦， 从而构成一个完整的超声 (相控） 聚焦换能器。 到大的声场发射范围， 同时保证高的发射强度。 而对于传统压电 陶瓷片来说， 要增加它的声场发射范围， 必须减小它的尺寸， 减
小尺寸意味着不容易达到足够的发射强度， 同时增加了加工的困 难。 釆用本发明的装置和制作方法， 既保证了声场发射范围和高 的发射强度， 同时又降低了加工成本。 Since the spherical convex lens has the effect of diverging the sound waves, the ultrasonic waves emitted from the piezoelectric ceramic sheets are then focused by controlling the driving signals to form a complete ultrasonic (phase-controlled) focusing transducer. A large sound field emission range is ensured while ensuring high emission intensity. For a traditional piezoelectric ceramic sheet, to increase its sound field emission range, its size must be reduced. The small size means that it is not easy to achieve sufficient emission intensity, and at the same time increases the difficulty of processing. By using the device and the manufacturing method of the invention, the sound field emission range and the high emission intensity are ensured, and the processing cost is reduced.
图 2示出了图 1中的球面凸透镜的机械尺寸。 其中： Figure 2 shows the mechanical dimensions of the spherical convex lens of Figure 1. among them:
Φ1: 压电陶瓷片的直径。 Φ1: Diameter of the piezoelectric ceramic piece.
a: 球面片的张角， 它的大小与***所要求的声场发射范围 有关， 声场发射范围越大， a越大。 a: The opening angle of the spherical piece, its size is related to the sound field emission range required by the system. The larger the sound field emission range, the larger a.
HI: 整个声透镜的高度。 HI: The height of the entire acoustic lens.
H2: 声透镜中圆柱体的高度。 H2: The height of the cylinder in the acoustic lens.
SR1: 声透镜的球面半径。 SR1: The spherical radius of the acoustic lens.
在上面描述的实施例中， 示出的超声聚焦换能器包括一个压 电陶瓷片， 并且所示出的声透镜优选地包括做成一体的圆柱体和 凸球体。 从而从压电陶瓷片发出的声波在经过圆柱体后再经相同 材料的凸球体 "折射"， 避免了粘接界面对声波的不利影响。 In the embodiment described above, the illustrated ultrasonic focusing transducer comprises a piezoelectric ceramic sheet, and the illustrated acoustic lens preferably comprises an integral cylindrical body and a convex spherical body. Therefore, the sound waves emitted from the piezoelectric ceramic sheets are "refracted" by the convex spheres of the same material after passing through the cylinder, thereby avoiding the adverse effect of the bonding interface on the sound waves.
在本发明的另一个实施例中，声透镜也可以只包括由凸球体 构成的凸透镜。 In another embodiment of the invention, the acoustic lens may also comprise only convex lenses composed of convex spheres.
在本发明的又一个实施例中，超声聚焦换能器可以包括由多 个压电陶瓷片构成的阵列， 同时， 在整个发射面上覆盖一个声透 镜。 这样， 可以同时采用阵列发射相位控制和声透镜聚焦控制， 在进行相位控制发射的同时， 又达到增加声场发射范围和强度的 效果。 In still another embodiment of the invention, the ultrasonic focusing transducer may comprise an array of a plurality of piezoelectric ceramic sheets, while simultaneously covering an entire transmitting surface with an acoustic lens. In this way, the array emission phase control and the acoustic lens focus control can be simultaneously used, and the phase control emission is simultaneously achieved, and the sound field emission range and intensity are increased.
在上面描述的实施例中， 示出的声透镜为具有圆形球面的凸 透镜。 在本发明的另一个实施例中， 声透镜可以设计为包括非正 圆形或非正球形的表面， 甚至可以是复杂曲线的表面， 从而类似 于光学透镜对光束的作用那样，对声束的聚焦起到补偿或校正"声 学像差 "的作用。 In the embodiment described above, the acoustic lens shown is a convex lens having a circular spherical surface. In another embodiment of the invention, the acoustic lens can be designed to include a non-circular or non-spherical surface, even a complex curved surface, similar to the effect of the optical lens on the beam, on the beam Focusing compensates or corrects the "acoustic aberration".
在本发明的又一个实施例中， 声透镜可以包括不只一个透
镜， 而是包括多个透镜（例如， 多个凹透镜和凸透镜， 其间配以 适当的声学粘合介廣）组合在一起的组合透镜， 从而进一步达到 精确控制聚焦的目的。 工业应用性 In still another embodiment of the present invention, the acoustic lens may include more than one through The mirror, but a combined lens comprising a plurality of lenses (for example, a plurality of concave and convex lenses with appropriate acoustic bonding), further achieves precise control of the focus. Industrial applicability
本发明的基于球面凸透镜的超声聚焦换能器可以使用在各 种超声波仪器中。 例如， 各种医用超声波扫描仪、 超声波治疗仪 的探头中。 尤其应用于高强聚焦超声（HIFLJ)治疗仪中。
The spherical convex lens-based ultrasonic focusing transducer of the present invention can be used in various ultrasonic instruments. For example, various medical ultrasonic scanners, ultrasonic probes in the probe. Especially used in high intensity focused ultrasound (HIFLJ) therapeutic apparatus.
Claims
1. 一种超声相控聚焦换能器， 包括： An ultrasonic phase-controlled focusing transducer comprising:
压电晶体； Piezoelectric crystal
用于将压电晶体产生的声束聚焦的声透镜； 和 An acoustic lens for focusing a sound beam generated by a piezoelectric crystal; and
压电晶体与声透镜之间的粘接层。 A bonding layer between the piezoelectric crystal and the acoustic lens.
2. 根据权利要求 1 的超声波聚焦换能器， 其中， 声透镜的 材料为金属材料或合金材料， 如铝、 铜或其合金。 2. The ultrasonic focusing transducer according to claim 1, wherein the material of the acoustic lens is a metal material or an alloy material such as aluminum, copper or an alloy thereof.
3. 根据权利要求 1 的超声波聚焦换能器， 其中， 声透镜的 材料为有机玻璃材料或环氧树脂材料。 3. The ultrasonic focusing transducer according to claim 1, wherein the material of the acoustic lens is a plexiglass material or an epoxy resin material.
4. 根据权利要求 1 的超声波聚焦换能器， 其中， 粘接层的 材料包括将声波耦合进金属球面凸透镜的各种材料， 如树脂粘合 材料等， 粘合材料中可以添加适量的金属粉（比如钨粉） ， 以提 高声阻抗匹配性能。 4. The ultrasonic focusing transducer according to claim 1, wherein the material of the bonding layer comprises various materials for coupling acoustic waves into the metal spherical convex lens, such as a resin bonding material, and an appropriate amount of metal powder may be added to the bonding material. (such as tungsten powder) to improve acoustic impedance matching performance.
5. 根据权利要求 1-4中任一项的超声波聚焦换能器， 其中， 声透镜为球面凸透镜。 The ultrasonic focusing transducer according to any one of claims 1 to 4, wherein the acoustic lens is a spherical convex lens.
6. 根据权利要求 1-4中任一项的超声波聚焦换能器， 其中， 声透镜包括做成一体的圆柱体和凸球体。 The ultrasonic focusing transducer according to any one of claims 1 to 4, wherein the acoustic lens comprises an integral cylindrical body and a convex spherical body.
7. 根据权利要求 1-4中任一项的超声波聚焦换能器， 其中， 声透镜的表面为非正球形的表面， 或复杂曲线的表面。 The ultrasonic focusing transducer according to any one of claims 1 to 4, wherein the surface of the acoustic lens is a non-spherical surface, or a surface of a complicated curve.
8. 根据权利要求 1-4中任一项的超声波聚焦换能器， 其中， 所述声透镜是包括多个透镜组合在一起的组合透镜。 The ultrasonic focusing transducer according to any one of claims 1 to 4, wherein the acoustic lens is a combined lens comprising a plurality of lenses combined.
9. 根据权利要求 8 中任一项的超声波聚焦换能器， 其中， 压电晶体包括由多个晶片构成的阵列， 同时， 在整个发射面上覆 盖一个声透镜。 The ultrasonic focusing transducer according to any one of claims 8 to 8, wherein the piezoelectric crystal comprises an array of a plurality of wafers, and at the same time, an acoustic lens is covered over the entire emitting surface.
10. —种聚焦超声治疗装置， 包括上述任一项权利要求中的 超声波聚焦换能器。
10. A focused ultrasound therapy device comprising an ultrasound focus transducer of any of the preceding claims.
1. 一种超声波聚焦换能器的制作方法， 包括： 提供压电晶体； A method of fabricating an ultrasonic focusing transducer, comprising: providing a piezoelectric crystal;
提供根据权利要求 1-9中任一项的声透镜； 以及 将压电晶体与声透镜用粘接材料粘接。
An acoustic lens according to any one of claims 1 to 9; and a piezoelectric crystal and an acoustic lens bonded to the acoustic material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2006/001805 WO2008011759A1 (en) | 2006-07-21 | 2006-07-21 | An ultrasound phase-control focusing transducer based on spherical lens |
| CNA200680055280XA CN101484208A (en) | 2006-07-21 | 2006-07-21 | An ultrasound phase-control focusing transducer based on spherical lens |
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| PCT/CN2006/001805 WO2008011759A1 (en) | 2006-07-21 | 2006-07-21 | An ultrasound phase-control focusing transducer based on spherical lens |
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| CN103007859A (en) * | 2012-12-31 | 2013-04-03 | 东南大学 | Glass spherical surface ultrasound focused cavitation reinforcement microreactor and preparation method thereof |
| CN111112037A (en) * | 2020-01-20 | 2020-05-08 | 重庆医科大学 | Lens type multi-frequency focusing ultrasonic transducer, transduction system and method for determining axial length of acoustic focal region of lens type multi-frequency focusing ultrasonic transducer |
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| CN110227216A (en) * | 2018-03-06 | 2019-09-13 | 重庆海扶医疗科技股份有限公司 | Ultrasonic transducer |
| CN110227217A (en) * | 2018-03-06 | 2019-09-13 | 重庆海扶医疗科技股份有限公司 | Ultrasonic transducer |
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| CN109596183B (en) * | 2018-12-26 | 2024-04-05 | 无锡市宇超电子有限公司 | Flow transducer |
| CN113996518B (en) * | 2021-11-18 | 2023-10-31 | 无锡海鹰医疗科技股份有限公司 | Dual-lens focusing ultrasonic transducer amplifying structure |
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| US5488957A (en) * | 1994-11-21 | 1996-02-06 | General Electric Company | System and method for promoting adhesion between lens and matching layer of ultrasonic transducer |
| JP2001069594A (en) * | 1999-08-26 | 2001-03-16 | Matsushita Electric Ind Co Ltd | Ultrasonic wave probe |
| CN1626041A (en) * | 2003-12-09 | 2005-06-15 | 株式会社东芝 | Ultrasonic probe and ultrasonic diagnostic apparatus |
| CN1669672A (en) * | 2005-04-20 | 2005-09-21 | 南京航空航天大学 | Piezoelectric type multi array element high intensity focusing ultrasonic transducer and focusing method |
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| CN102430512A (en) * | 2011-09-30 | 2012-05-02 | 东南大学 | Integrated system on ultrasonic transducer sheet with MEMS (Micro-Electromechanical Systems) glass sphere and preparation method thereof |
| CN103007859A (en) * | 2012-12-31 | 2013-04-03 | 东南大学 | Glass spherical surface ultrasound focused cavitation reinforcement microreactor and preparation method thereof |
| CN111112037A (en) * | 2020-01-20 | 2020-05-08 | 重庆医科大学 | Lens type multi-frequency focusing ultrasonic transducer, transduction system and method for determining axial length of acoustic focal region of lens type multi-frequency focusing ultrasonic transducer |
Also Published As
| Publication number | Publication date |
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| WO2008011759A8 (en) | 2009-02-19 |
| CN101484208A (en) | 2009-07-15 |
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