A dual focal zone ultrasonic treatment head

Abstract

A kind of bifocal ultrasonic treatment head, including mounting base and the transmitting assembly installed on mounting base;The mounting base includes mounting base plate and cooling seat installed on mounting base plate, and transmitting assembly is installed on cooling seat;The transmitting assembly is composed of several transmitting bases arranged in row, and transmitting base includes main transmitting unit for focusing acoustic beam energy at superficial focus and side transmitting unit for penetrating acoustic beam energy to deeper focus, and side transmitting unit is symmetrically arranged on both sides of main transmitting unit;Compared with prior art, by setting double-specification main transmitting unit and side transmitting unit, acoustic beam focal point can be accurately matched with preset value, and the acoustic field emitted by main transmitting unit and side transmitting unit acts as heat source, which can generate thermal effect in specific subcutaneous area, to meet different levels of clinical treatment requirements.

Description

Technical Field

[0001] This invention relates to the field of ultrasound therapy technology, and more specifically to a dual-focal-domain ultrasound therapy head. Background Technology

[0002] Ultrasound therapy is a non-invasive and painless physical therapy technique widely used in medicine and physiotherapy. It uses high-frequency sound waves to penetrate deep into human tissues and produce therapeutic effects through thermal, mechanical, and cavitation effects.

[0003] As a non-invasive treatment, ultrasound therapy focuses on the precise and controllable deposition of ultrasound energy into a specific focal area under the skin. Through thermal effects, it achieves tissue coagulation and collagen regeneration. Because it requires no incisions, has a short recovery period, and can target deep subcutaneous layers, ultrasound therapy has become an important direction in the field of skin tightening and rejuvenation. The basic principle of ultrasound therapy is to convert electricity into ultrasound waves through a piezoelectric transducer. The treatment process utilizes the inherent tissue penetration and thermal effects of ultrasound waves to generate transient high temperatures at the focal point, thereby precisely destroying the target tissue and stimulating subsequent repair responses.

[0004] Chinese patent CN209422796U discloses a focused ultrasound therapy system, including an ultrasound transducer and an MRI device. The ultrasound transducer treats the treatment area under the guidance of the MRI device. The MRI device includes an MRI body and a treatment bed. The MRI body includes a radio frequency transmitting mechanism. The treatment bed includes a bed frame for a person to lie supine in the lithotomy position and a radio frequency receiving mechanism disposed on the bed frame. The radio frequency receiving mechanism is used to receive the radio frequency emitted by the radio frequency transmitting mechanism. The ultrasound transducer is movable such that the focal zone of the ultrasound transducer is within the aperture of the MRI body. The treatment bed is movable such that the radio frequency receiving mechanism is within the aperture of the MRI body.

[0005] The aforementioned ultrasound treatment system relies on a single-element specification and a treatment head with a fixed depth of focus. Although it can achieve treatment at a single depth, when dealing with clinical needs that require simultaneous action on different layers such as the superficial dermis and the deep fascia, the operator must repeatedly change gel pads of different specifications or treatment heads optimized for different depths. The treatment process is cumbersome and inefficient, making it difficult to achieve both precise focusing and effective penetration. Furthermore, the assembly process is complex and the manufacturing cost is high. Summary of the Invention

[0006] The present invention aims to overcome the defects in the prior art and provide a dual-focal-domain ultrasound treatment head that enables the sound beam focus to be precisely matched with a preset value, works in conjunction with the cooling system, and significantly improves treatment efficiency.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a dual-focal-domain ultrasound treatment head, comprising a mounting base and a transmitting assembly mounted on the mounting base; the mounting base includes a mounting substrate and a cooling seat mounted on the mounting substrate, and the transmitting assembly is mounted on the cooling seat; the transmitting assembly consists of several transmitting bases arranged in rows, each transmitting base including a main transmitting unit for concentrating sound beam energy at a superficial focal point and a side transmitting unit for penetrating sound beam energy to a deeper focal point, the side transmitting units being symmetrically arranged on both sides of the main transmitting unit; the main transmitting unit is arranged parallel to the mounting substrate, the side transmitting units are arranged at an angle relative to the mounting substrate, and the sound beams emitted by the two side transmitting units located on both sides of the main transmitting unit are focused; the cooling seat is filled with a coolant for cooling the cooling seat.

[0008] As a preferred embodiment of the present invention, the main transmitting unit includes a main transmitting base and a main array element adhered to the surface of the main transmitting base. The surface of the main transmitting base is arranged parallel to the mounting substrate. The side transmitting unit includes a side transmitting base and a side array element adhered to the surface of the side transmitting base. The surface of the side transmitting base is arranged at an angle relative to the mounting substrate.

[0009] As a preferred embodiment of the present invention, the two side array elements located on both sides of the main transmitting unit are tilted in opposite directions, and the tilt angle of the side array elements relative to the mounting substrate is 25°-35°.

[0010] In a preferred embodiment of the present invention, the operating frequency of the main array element is greater than that of the side array element.

[0011] As a preferred embodiment of the present invention, the operating modes of both the main array element and the side array element are stretching vibrations in the thickness direction.

[0012] As a preferred embodiment of the present invention, a connecting cover for covering the transmitting component and the cooling base is installed on the mounting base. The connecting cover and the mounting base form a sealed cavity for placing the transmitting component and the cooling base in a sealed environment. The sealed cavity is filled with a sound-conducting medium corresponding to the transmitting component.

[0013] As a preferred embodiment of the present invention, the connecting cover has a plurality of hollowed-out sound windows corresponding to the transmitting components, and the surface of the hollowed-out sound windows is covered with a sound-permeable membrane for sealing the sound-conducting medium.

[0014] As a preferred embodiment of the present invention, a plurality of the hollowed-out sound windows correspond one-to-one with a plurality of transmitting bases, and the size of the hollowed-out sound windows is not less than 1.5 times the effective radiation area of ​​the corresponding transmitting base.

[0015] As a preferred embodiment of the present invention, the cooling seat is provided with a loop-shaped cooling channel for realizing the circulation and return of coolant.

[0016] As a preferred embodiment of the present invention, the mounting substrate has mounting holes for connecting to an external cooling system, and the external cooling system seals the loop-shaped cooling channel.

[0017] Compared to existing technologies, by setting up dual-specification main and side emission units, the sound beam focus can be precisely matched to the preset value. The sound fields emitted by the main and side emission units serve as heat sources, generating thermal effects in specific subcutaneous areas to meet the clinical treatment needs at different levels. At the same time, the main and side emission units work in conjunction with the cooling base during use to ensure that the temperature rise range of the main and side emission units at two different focal depths is controllable.

[0018] By setting up main emission units and side emission units with different focal domains, the skin treatment functions of superficial and deep layers are integrated into one, significantly improving treatment efficiency.

[0019] By setting up a connecting cover and filling the connecting cover with a sound-guiding medium, the energy loss of sound waves in the propagation path is effectively reduced, the effective energy of the sound beam is preserved to the maximum extent, thereby improving the overall transmission efficiency of sound energy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the connection between the launch component and the mounting base;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the formation of a loop-shaped cooling channel;

[0023] Figure 4 This is a schematic diagram of the focal point of the main array element;

[0024] Figure 5 This is a schematic diagram of the focal point of the side array elements;

[0025] Figure 6 This is an exploded view of the present invention;

[0026] Figure 7 This is a cross-sectional view of the present invention;

[0027] Reference numerals: Mounting base 1, Mounting substrate 11, Cooling seat 12, Recurving cooling channel 13, Mounting hole 14, Transmitting assembly 2, Main transmitting unit 3, Main transmitting seat 31, Main array element 32, Side transmitting unit 4, Side transmitting seat 41, Side array element 42, Connecting cover 5, Hollowed-out sound window 6, Sound-permeable membrane 7, Sealing cavity 8. Detailed Implementation

[0028] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0029] like Figure 1-7 As shown, a dual-focal-domain ultrasound treatment head includes a mounting base 1 and a transmitting assembly 2 mounted on the mounting base 1. The mounting base 1 includes a mounting substrate 11 and a cooling seat 12 mounted on the mounting substrate 11, and the transmitting assembly 2 is mounted on the cooling seat 12. The transmitting assembly 2 is composed of several transmitting bases 21 arranged in rows. Each transmitting base 21 includes a main transmitting unit 3 for concentrating sound beam energy at a superficial focal point and a side transmitting unit 4 for penetrating sound beam energy to a deeper focal point. The side transmitting units 4 are symmetrically arranged on both sides of the main transmitting unit 3. The main transmitting unit 3 is arranged parallel to the mounting substrate 11, and the side transmitting units 4 are arranged at an angle relative to the mounting substrate 11. The sound beams emitted by the two side transmitting units 4 located on both sides of the main transmitting unit 3 are focused. The cooling seat 12 is filled with a coolant for cooling the cooling seat 12.

[0030] The number of transmitting bases 21 is set according to actual needs, and several transmitting bases 21 are arranged in rows at equal intervals. Several transmitting bases 21 can have side transmitting units 4 with different tilt angles. The side transmitting units 4 with different tilt angles can be arranged in arithmetic progression in the rows of transmitting bases 21. The side transmitting units 4 with different tilt angles cooperate to form sound beam energy concentration points with different focusing depths.

[0031] The transmitting base 21 consists of a main transmitting unit 3 and two side transmitting units 4, which work together to form a sound beam energy concentration point.

[0032] The main transmitting unit 3 includes a main transmitting base 31 and a main array element 32 adhered to the surface of the main transmitting base 31. The surface of the main transmitting base 31 is arranged parallel to the mounting substrate 11. The side transmitting unit 4 includes a side transmitting base 41 and a side array element 42 adhered to the surface of the side transmitting base 41. The surface of the side transmitting base 41 is arranged at an angle relative to the mounting substrate 11.

[0033] The main array element 32 is tightly fixed to the emitting surface of the main transmitter 31 with adhesive. Similarly, the side array element 42 is tightly fixed to the emitting surface of the side transmitter 41 with adhesive. Both the main transmitter 31 and the side transmitter 41 are made of pure aluminum. The high thermal conductivity of aluminum enhances the heat dissipation of the main array element 32 and the side array element 42, alleviating the heat generation problem during high-power operation. At the same time, aluminum helps to achieve unidirectional radiation of the main array element 32 and the side array element 42, thereby reducing backward energy leakage and increasing forward radiation power.

[0034] The two side array elements 42 located on both sides of the main transmitting unit 3 are tilted in opposite directions, and the tilt angle of the side array elements 42 relative to the mounting substrate 11 is 25°-35°. The tilted side array elements 42 are designed to assist the sound beam focusing of the side array elements 42 through physical structure.

[0035] The tilt angle of the side array element 42 takes into account the refraction and attenuation of sound waves in different media, and is coordinated with the height of the connecting cover 5. The ultimate goal is to ensure that the biological focal zone accurately reaches the specified depth. (Note: The concepts of acoustic focal zone (the focusing area in an ideal medium) and biological focal zone (the focusing area of ​​actual biological tissue affected by various factors such as tissue characteristics) are different. In the field of ultrasound therapy, the key evaluation indicator is the biological focal zone.)

[0036] The operating frequency of the main array element 32 is higher than that of the side array element 42. Given that sound waves have the characteristic of high-frequency attenuation being greater and low-frequency attenuation being smaller in skin tissue, the operating frequencies were specifically designed to achieve precise focusing and optimize energy transmission: the main array element 32 uses a higher frequency (10-12) MHz to concentrate the sound beam energy on the surface and reduce leakage to deeper areas; the side array element 42 uses a lower frequency (4-6) MHz to ensure that there is enough energy to penetrate to a deeper focal point. The dimensions of all main array elements 32 and side array elements 42 have been designed so that the operating frequencies of the main array elements 32 and side array elements 42 are close to their own inherent resonant frequencies, thereby maximizing energy output.

[0037] Both the main array element 32 and the side array element 42 operate in the thickness direction of expansion and contraction vibration. Both the main array element 32 and the side array element 42 adopt a thin strip structure of piezoelectric ceramic. Under the support of the main transmitter base 31, the emission surface of the main array element 32 is set parallel to the mounting substrate 11. During use, the emission surface of the main array element 32 faces the skin surface. Under the support of the side transmitter base 41, the emission surface of the side array element 42 is set at an angle relative to the mounting substrate 11. During use, the emission surface of the side array element 42 is tilted towards the skin surface.

[0038] A connecting cover 5 for covering the transmitting component 2 and the cooling base 12 is installed on the mounting base 11. The connecting cover 5 and the mounting base 11 form a sealed cavity 8 for sealing the transmitting component 2 and the cooling base 12. The sealed cavity 8 is filled with a sound guiding medium corresponding to the transmitting component 2.

[0039] The material of the connecting cover 5 is plastic with a certain degree of hardness. The sound-conducting medium can be a solution or a gel. It is required that the sound-conducting medium has a low sound attenuation coefficient and that its acoustic impedance is as close as possible to that of human tissue in order to minimize the reflection loss of sound waves at the interface. At the same time, it should have good sound transmission, weather resistance and temperature resistance, ensuring that it does not freeze or have significant expansion and contraction in the range of -20℃ to 65℃. Glycerin, propylene glycol, ethylene glycol or other antifreeze or low-temperature resistant coupling agent or coupling pad can be selected.

[0040] The connecting cover 5 has several hollowed-out acoustic windows 6 corresponding to the emission component 2. The surface of the hollowed-out acoustic windows 6 is covered with a sound-permeable membrane 7 for sealing the sound-conducting medium. The hollowed-out acoustic windows 6 facilitate the ultrasonic output of the emission component 2. The hollowed-out acoustic windows 6 are used to reduce the attenuation of sound wave energy when the sound waves generated by the main array element 32 and the side array element 42 enter the skin tissue through the connecting cover 5. The sound-permeable membrane 7 is used to block the leakage of the sound-conducting medium while satisfying the ultrasonic output of the hollowed-out acoustic windows 6.

[0041] The sound-permeable membrane 7 has good tear resistance, sound transmission and insulation properties. It can be made of plastic, silicone or gel material, and the thickness must be <0.2mm. It is designed to provide a high-efficiency transmission channel for sound waves.

[0042] A number of perforated acoustic windows 6 correspond one-to-one with a number of transmitting bases 21, and the size of the perforated acoustic window 6 is not less than 1.5 times the effective radiation area of ​​the corresponding transmitting base 21. The radiation area of ​​the main array element 32 in the transmitting base 21 is 4-6 mm. 2 The treatment depth ranges from 1 to 3 mm subcutaneously, and the radiation area of ​​the lateral array element 42 is 2 to 4 mm. 2 The treatment depth range is subcutaneous (3.5-5.5) mm. In principle, while ensuring the structural strength of the connecting cover 5, the size of the hollowed-out sound window 6 should be as large as possible to ensure that more sound energy can pass through effectively and avoid energy loss and focus shift.

[0043] The cooling base 12 has a loop-shaped cooling channel 13 for realizing the circulation of coolant. The cooling base 12 is filled with coolant. Under the action of the loop-shaped cooling channel 13, the coolant circulates back to dissipate heat from the main array element 32 and the side array element 42. Under the action of the loop-shaped cooling channel 13, a larger heat dissipation area can be achieved in a limited space. The coolant medium can be water or other liquid medium. During use, attention should be paid to preventing freezing. If necessary, the coolant should be drained in time after use to avoid freezing damage to the launch component 2.

[0044] Mounting plate 11 has mounting holes 14 for connecting to an external cooling system. The external cooling system seals the loop cooling channel 13. When the cooling system is running, the coolant flows through the loop cooling channel 13, which cools the surfaces of the main array element 32 and the side array element 42 and the skin surface they contact. On the other hand, it uses the skin cooling effect to precisely control the focal zone at a predetermined depth.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0046] Although this document frequently uses reference numerals from the figures, such as mounting base 1, mounting substrate 11, cooling seat 12, loop-shaped cooling channel 13, mounting hole 14, transmitting assembly 2, main transmitting unit 3, main transmitting seat 31, main array element 32, side transmitting unit 4, side transmitting seat 41, side array element 42, connecting cover 5, perforated sound window 6, sound-permeable membrane 7, and sealing cavity 8, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A dual-focal-domain ultrasound treatment head, comprising a mounting base (1) and a transmitting assembly (2) mounted on the mounting base (1); characterized in that, The mounting base (1) includes a mounting base (11) and a cooling base (12) mounted on the mounting base (11). The transmitting assembly (2) is mounted on the cooling base (12). The transmitting assembly (2) consists of several transmitting bases (21) arranged in rows. The transmitting base (21) includes a main transmitting unit (3) for concentrating the sound beam energy at the shallow focal point and a side transmitting unit (4) for penetrating the sound beam energy to the deeper focal point. The side transmitting units (4) are symmetrically arranged on both sides of the main transmitting unit (3). The main transmitting unit (3) is arranged parallel to the mounting base (11), and the side transmitting units (4) are arranged at an angle relative to the mounting base (11). The sound beams emitted by the two side transmitting units (4) located on both sides of the main transmitting unit (3) are focused. The cooling base (12) is filled with a coolant for cooling the cooling base (12).

2. The dual-focal-domain ultrasound treatment head according to claim 1, characterized in that, The main transmitting unit (3) includes a main transmitting base (31) and a main array element (32) adhered to the surface of the main transmitting base (31). The surface of the main transmitting base (31) is arranged parallel to the mounting substrate (11). The side transmitting unit (4) includes a side transmitting base (41) and a side array element (42) adhered to the surface of the side transmitting base (41). The surface of the side transmitting base (41) is inclined relative to the mounting substrate (11).

3. The dual-focal-domain ultrasound treatment head according to claim 2, characterized in that, The two side array elements (42) located on both sides of the main transmitting unit (3) are tilted in opposite directions, and the tilt angle of the side array elements (42) relative to the mounting substrate (11) is 25°-35°.

4. The dual-focal-domain ultrasound treatment head according to claim 2, characterized in that, The operating frequency of the main array element (32) is greater than that of the side array element (42).

5. A dual-focal-domain ultrasound treatment head according to claim 1, characterized in that, The operating modes of the main array element (32) and the side array element (42) are both stretching vibrations in the thickness direction.

6. The dual-focal-domain ultrasound treatment head according to claim 1, characterized in that, The mounting base (11) is equipped with a connecting cover (5) for covering the transmitting component (2) and the cooling base (12). The connecting cover (5) and the mounting base (11) form a sealed cavity (8) for placing the transmitting component (2) and the cooling base (12) in a sealed environment. The sealed cavity (8) is filled with a sound guiding medium corresponding to the transmitting component (2).

7. A dual-focal-domain ultrasound treatment head according to claim 6, characterized in that, The connecting cover (5) has a plurality of hollow sound windows (6) corresponding to the emission component (2), and the surface of the hollow sound windows (6) is covered with a sound-permeable membrane (7) for sealing the sound-conducting medium.

8. A dual-focal-domain ultrasound treatment head according to claim 7, characterized in that, A number of the aforementioned hollowed-out sound windows (6) correspond one-to-one with a number of transmitting bases (21), and the size of the hollowed-out sound windows (6) is not less than 1.5 times the effective radiation area of ​​the corresponding transmitting base (21).

9. A dual-focal-domain ultrasound treatment head according to claim 1, characterized in that, The cooling seat (12) has a loop-shaped cooling channel (13) formed inside to realize the circulation and return of coolant.

10. A dual-focal-domain ultrasound treatment head according to claim 9, characterized in that, The mounting base plate (11) has mounting holes (14) for connecting to an external cooling system, and the external cooling system seals the loop cooling channel (13).

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