WO2015037752A1

WO2015037752A1 - High strength focused ultrasonic wave treatment head having improved sealing characteristic

Info

Publication number: WO2015037752A1
Application number: PCT/KR2013/008248
Authority: WO
Inventors: 박경모; 손건호
Original assignee: 알피니언메디칼시스템 주식회사
Priority date: 2013-09-12
Filing date: 2013-09-12
Publication date: 2015-03-19
Also published as: CN105530994A; KR101808835B1; CN105530994B; KR20160025556A

Abstract

A high-strength focused ultrasonic wave treatment head having an improved sealing characteristic comprises: a high-strength focused ultrasonic wave transducer; a housing; a membrane; and a sealing part for the membrane. The high-strength focused ultrasonic wave transducer has an ultrasonic wave radiation surface located at the lower end thereof. The housing receives the high-strength focused ultrasonic wave transducer at the lower opening thereof to expose the ultrasonic wave radiation surface. The membrane has a receiving space which is formed to surround the lower opening and an outer peripheral surface of the housing to receive an ultrasonic wave transfer medium between the ultrasonic wave radiation surface and the membrane, and is in close contact with the outer peripheral surface of the housing. The sealing part of the membrane is located on the outer peripheral surface of the housing to seal a space between the membrane and the housing.

Description

High intensity focused ultrasound therapy head with improved sealing properties

The present invention relates to a high-intensity focused ultrasound therapy head used to treat high heat generated at the focal point when high-intensity ultrasound energy is collected in one place.

High-Intensity Focused Ultrasound (HIFU) is a procedure that burns and removes lesion tissue in the body by using high heat of 65-100 degrees centigrade at the focus when high-intensity ultrasound energy is collected in one place. In other words, focusing ultrasonic waves about one hundred thousand times stronger than the ultrasound intensity used to diagnose them in one place produces heat at the focal point, and this heat can be used to burn away the tissue in the body.

Ultrasound itself is harmless to the human body and heat is generated only at the focal point where the ultrasound is concentrated, so the lesions in the body can be treated non-invasive. High-intensity focused ultrasound therapy is available for pancreatic cancer, uterine fibroids, liver cancer, etc., and active research is being conducted on prostate cancer, endometrial cancer, kidney cancer, breast cancer, soft tissue tumors, and bone tumors.

For example, the high intensity focused ultrasound therapy head has a high intensity focused ultrasound transducer at its end. The high intensity focused ultrasound transducer is configured to emit high intensity focused ultrasound. The ultrasonic radiating surface of the high intensity focused ultrasound transducer is covered by a membrane. The ultrasonic delivery medium is filled in the space formed between the ultrasonic radiating surface and the membrane. Generally, degassed water is used as the ultrasonic delivery medium. In addition, the high intensity focused ultrasound treatment head may be provided with an imaging transducer for obtaining a diagnostic image. The imaging transducer is fitted to the high intensity focused ultrasound transducer so that the lower portion penetrates the high intensity focused ultrasound transducer and is located in the space between the ultrasound radiation plane and the membrane.

The high intensity focused ultrasound treatment head is positioned above the patient and emits high intensity focused ultrasound through the ultrasonic radiating surface of the high intensity focused ultrasound transducer while keeping the membrane in close contact with the patient's skin. The high intensity focused ultrasound is then delivered to the lesion site of the patient via water between the ultrasonic radiating surface and the membrane.

On the other hand, according to the related art, the membrane portion is sealed to the edge portion of the high-intensity focused ultrasound transducer by a sealing mechanism, so that the water filled between the membrane and the ultrasonic radiation surface does not leak. However, as described above, when excessive pressure is applied to the water in the process of bringing the membrane into close contact with the patient's skin during high-intensity focused ultrasound treatment, there is a high risk of water leakage through the combined portion of the membrane and the high-intensity focused ultrasound transducer. . Therefore, the sealing treatment of the combined area of the membrane and the high intensity focused ultrasound transducer is important.

In addition, the imaging transducer may be rotated to acquire a diagnostic image while being fitted to the high intensity focused ultrasound transducer. In this case, the combined portion of the imaging transducer and the high intensity focused ultrasound transducer needs to be sealed to prevent leakage of water and to allow the imaging transducer to rotate smoothly.

An object of the present invention is to provide a high-intensity ultrasound treatment head that can increase the effect of preventing the leakage of the ultrasound delivery medium.

The high intensity focused ultrasound treatment head according to the present invention for achieving the above object includes a high intensity focused ultrasound transducer, a housing, a membrane, and a seal for the membrane. The high intensity focused ultrasound transducer has an ultrasonic radiation plane located at the bottom. The housing receives a high intensity focused ultrasound transducer in the lower opening such that the ultrasonic radiating surface is exposed. The membrane is formed to surround the lower opening of the housing and the outer circumferential surface to form an accommodating space for accommodating the ultrasonic transmission medium between the ultrasonic radiating surface and the close contact with the outer circumferential surface of the housing. The seal for the membrane is located toward the outer peripheral face of the housing to seal between the membrane and the housing.

The high intensity focused ultrasound treatment head according to the present invention includes a high intensity focused ultrasound transducer, a membrane, an imaging transducer, a partition, and a seal for the imaging transducer. The high intensity focused ultrasound transducer has an ultrasonic radiation plane located at the bottom. The imaging transducer is formed to surround the ultrasonic radiation surface to form an accommodation space for accommodating the ultrasonic transmission medium between the ultrasonic radiation surface. The imaging transducer is inserted through the insertion hole of the high intensity focused ultrasound transducer and placed in the receiving space. The septum extends upwardly from the periphery of the insertion hole to surround the outer peripheral face of the imaging transducer. The seal for the imaging transducer is located toward the outer peripheral face of the imaging transducer to seal between the imaging transducer and the septum.

According to the present invention, even when excessive pressure is applied to the ultrasound delivery medium in the process of bringing the membrane into close contact with the patient's skin during high-intensity focused ultrasound therapy, the effect of preventing leakage of the ultrasound delivery medium can be enhanced. As a result, stability may be increased during high-intensity focused ultrasound therapy.

According to the present invention, it is possible to smoothly rotate the imaging transducer while increasing the sealing effect of the imaging transducer. In addition, according to the present invention, in addition to the reliable sealing effect, assembling or disassembling the sealing site is simple, so that the user's convenience can be enhanced.

1 is a cross-sectional view of the high intensity focused ultrasound treatment head according to an embodiment of the present invention.

2 is a cross-sectional view showing a state before the ultrasonic delivery medium is filled in the receiving space in FIG.

3 is an enlarged cross-sectional view of a region A in FIG. 1.

FIG. 4 is an exploded perspective view illustrating the housing and the membrane disassembled in FIG. 3.

FIG. 5 is an enlarged perspective view of region C in FIG. 4. FIG.

FIG. 6 is a cross-sectional view of a housing and a membrane part having a seal for a membrane according to another example.

FIG. 7 is a cross-sectional view illustrating a state in which a state is sealed between the housing and the membrane by the first sealing protrusions and the second sealing protrusions in FIG. 6.

FIG. 8 is an enlarged cross-sectional view of region B in FIG. 1.

FIG. 9 is an exploded perspective view of the imaging transducer and the sealant in FIG. 8.

When described in detail with reference to the accompanying drawings for the present invention. Here, the same reference numerals are used for the same components, and repeated descriptions and detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for clarity.

1 is a cross-sectional view of the high intensity focused ultrasound treatment head according to an embodiment of the present invention. 2 is a cross-sectional view showing a state before the ultrasonic delivery medium is filled in the receiving space in FIG.

1 and 2, the high intensity focused ultrasound treatment head 100 includes a high intensity focused ultrasound transducer 110, a housing 120, a membrane 130, and a seal 140 for the membrane. .

The high intensity focused ultrasound transducer 110 radiates high intensity focused ultrasound for patient treatment. The high intensity focused ultrasound transducer 110 may have an ultrasonic radiating surface 110a at a lower end thereof. For example, the high intensity focused ultrasound transducer 110 may include an ultrasound generator 111 and an ultrasound radiation frame 116. The ultrasonic wave generator 111 may be mounted on the ultrasonic radiation frame 116. Although not shown, the ultrasonic wave generator 111 may be electrically connected to the driving circuit board by wiring or the like.

The ultrasonic wave generator 111 may include a piezoelectric element. When the piezoelectric element receives a voltage by the driving circuit board, the piezoelectric element resonates to generate ultrasonic waves. The piezoelectric element may be made of a piezoelectric ceramic such as lead zirconate titanate (PZT), a single crystal, a composite piezoelectric composite of these materials and a polymer material. In addition, the ultrasonic wave generator 111 may include an acoustic matching layer positioned on one side of the piezoelectric element so as to appropriately set resonance characteristics. The ultrasonic generator 111 may be configured in various forms in a range capable of generating high intensity ultrasonic waves, and is not limited thereto.

The ultrasonic radiation frame 116 focuses and radiates high intensity ultrasonic waves generated from the ultrasonic generator 111. The ultrasonic radiation frame 116 may have a predetermined thickness and may have a shape in which the central portion is convex upward. The lower surface of the ultrasonic radiation frame 116 corresponds to the ultrasonic radiation surface 110a.

The housing 120 receives the high intensity focused ultrasound transducer 110 in the lower opening so that the ultrasonic radiating surface 110a is exposed. The housing 120 may have a cylindrical shape having an inner space and an open lower side thereof. The lower opening of the housing 120 may be closed by the edge of the ultrasonic radiation frame 116 is coupled to the periphery.

The membrane 130 is formed to surround the lower opening of the housing 120 and the outer circumferential surface to form an accommodation space 131 for accommodating the ultrasonic transfer medium 101 between the membrane 130 and the ultrasonic radiation surface 110a. For example, the membrane 130 may have a cylindrical hollow shape and have an upper side open. The membrane 130 may be fitted to surround the lower opening and the outer circumferential surface of the housing 120 from the lower side of the housing 120. Ultrasonic delivery medium 101 may be made of degassed water and the like.

The membrane 130 is in close contact with the outer circumferential surface of the housing 120. The membrane 130 has a shape as shown in FIG. 2 in a state in which the ultrasonic delivery medium 101 is not received in the receiving space 131. In this state, when the ultrasonic delivery medium 101 is filled in the receiving space 131 in a set amount, the membrane 130 has a hemispherical shape in which a portion surrounding the lower opening of the housing 120 is shown in FIG. 1. It can be modified.

The membrane 130 may be made of a material having an acoustic impedance similar to that of the ultrasonic transmission medium 101, less ultrasonic transmission loss, and excellent elasticity. For example, the membrane 130 may be made of a material such as ethylene propylene (EPDM) rubber, latex rubber, silicone rubber, or the like.

In addition, the membrane 130 may have a portion surrounding the outer circumferential surface of the housing 120 thicker than a portion surrounding the lower opening of the housing 120. Accordingly, the membrane 130 may maintain a more rigid shape in a state in which the outer circumferential surface of the housing 120 is wrapped. The membrane seal 140 is located toward the outer circumferential surface of the housing 120 to seal between the membrane 130 and the housing 120. Accordingly, the ultrasonic transfer medium 101 filled between the membrane 130 and the ultrasonic radiation surface 110a may not leak through the coupling portion of the membrane 130 and the housing 120.

As such, the membrane 130 extends to cover the outer circumferential surface of the housing 120 from a portion surrounding the lower opening of the housing 120 to cover the ultrasonic radiating surface 110a and the outer circumferential surface of the housing 120. A portion surrounding the seal is sealed to the housing 120 by the membrane sealing portion 140. Accordingly, when the lower portion of the membrane 130 is pressed to apply pressure to the ultrasonic transfer medium 101, the pressure may be distributed to the circumferential portion of the membrane 130, so that the sealing effect may be enhanced.

In addition, rather than the membrane 130 is sealed to the edge portion of the ultrasonic radiation surface (110a), the ultrasonic transfer medium leaked from the edge of the ultrasonic radiation surface (110a) to the sealing portion located on the outer peripheral surface side of the housing 120 The distance traveled can be long. Therefore, even when excessive pressure is applied to the ultrasound delivery medium 101 in the process of bringing the membrane 130 into close contact with the patient's skin during the high intensity focused ultrasound therapy, the ultrasound delivery medium is coupled through the combined portion of the membrane 130 and the housing 120. The effect of preventing 101 from leaking can be increased.

For example, referring to FIGS. 3 to 5 together with FIG. 1, the membrane sealing part 140 may include at least two first sealing protrusions 141. The first sealing protrusions 141 may protrude along the circumferential direction from the outer circumferential surface of the housing 120 and may be spaced apart from each other up and down. When the inner circumferential surface of the membrane 130 is in close contact with the outer circumferential surface of the housing 120, the membrane 130 has a portion corresponding to the first sealing protrusions 141 in the form of the first sealing protrusions 141. While being deformed to fit the first sealing protrusions (141) is forcibly fitted. Accordingly, the membrane 130 and the housing 120 may be double sealed at the outer circumferential surface of the housing 120.

The first sealing protrusions 141 may be formed in a form in which the protruding length gradually increases toward the upper side. Accordingly, the effect of preventing leakage of the ultrasonic delivery medium 101 may be increased. In addition, the membrane 130 may increase the portions to be caught with the first sealing protrusions 141, thereby preventing the membrane 130 from falling out from being coupled to the housing 120. Although the first sealing protrusion 141 is illustrated as two, three or more of course may be possible.

The membrane sealing part 140 may further include at least one second sealing protrusion 142. As shown in FIGS. 4 and 5, the second sealing protrusion 142 protrudes along the circumferential direction from the inner circumferential surface of the membrane 130. The second sealing protrusion 142 is disposed between the first sealing protrusions 141.

When the inner circumferential surface of the membrane 130 is in close contact with the outer circumferential surface of the housing 120, as shown in FIG. 3, the second sealing protrusion 142 is deformed to be pressed against the outer circumferential surface of the housing 120. do. Accordingly, the second sealing protrusion 142 is disposed between the first sealing protrusions 141 to seal the membrane 130 and the housing 120 once more, and thus, the membrane 130 and the housing 120. ) Can be sealed in triplicate. Thus, the effect of sealing between the membrane 130 and the housing 120 may be higher. Although the second sealing protrusion 142 is illustrated as having a shape having a substantially semi-circular cross section, the second sealing protrusion 142 may be formed in various shapes without being limited thereto. In addition, two or more second sealing protrusions 142 may be provided.

As such, the membrane 130 may be sealed and fixed between the membrane 130 and the housing 120 through the process of fitting the membrane 130 from the lower side of the housing 120. It can increase the convenience.

As another example, as shown in FIGS. 6 and 7, at least two or more first sealing protrusions 241 may protrude along the circumferential direction from the inner circumferential surface of the membrane 130 and may be spaced apart from each other up and down. When the inner circumferential surface of the membrane 130 is in close contact with the outer circumferential surface of the housing 120, the first sealing protrusions 241 are deformed to compress the outer circumferential surface of the housing 120. The first sealing protrusions 241 may be formed in a form in which the protruding length gradually increases toward the upper side.

In addition, the at least one second sealing protrusion 242 protrudes along the circumferential direction from the outer circumferential surface of the housing 120. The second sealing protrusion 242 is disposed between the first sealing protrusions 241. When the inner circumferential surface of the membrane 130 is in close contact with the outer circumferential surface of the housing 120, the membrane 130 has a portion corresponding to the second sealing protrusion 242 in the form of the second sealing protrusion 242. The second sealing protrusion 242 is pressed by being deformed to fit. Accordingly, the gap between the membrane 130 and the housing 120 may be sealed. Without being limited to this example, the sealing portion for the membrane may be formed in various forms, of course.

Meanwhile, as shown in FIG. 1, the high intensity focused ultrasound treatment head 100 may include an imaging transducer 150. In this case, the high intensity focused ultrasound treatment head 100 may include a seal 160 for an imaging transducer.

The imaging transducer 150 is for acquiring a diagnostic image of the subject. The operator may perform high intensity focused ultrasound therapy while checking the diagnostic image acquired by the imaging transducer 150.

The imaging transducer 150 may be configured to transmit the ultrasonic signal to the subject and receive the ultrasonic signal reflected from the subject. For example, the imaging transducer 150 may be configured by embedding a piezoelectric element or the like in a cylindrical casing. Ultrasound may be transmitted and received through the lower surface of the imaging transducer 150.

The imaging transducer 150 may be inserted through the insertion hole 117 of the high intensity focused ultrasound transducer 110 and positioned in the accommodation space. Insertion hole 117 may be formed in the central portion of the ultrasonic radiation frame 116. In the housing 120, a partition wall 126 may be provided to support the imaging transducer 150. The partition wall 126 extends upward from the periphery of the insertion hole 117 to surround the imaging transducer 150 in the housing 120. The imaging transducer 150 may acquire a diagnostic image while rotating as necessary in a state of being coupled to the ultrasonic radiation frame 116. In this case, the imaging transducer 150 may be rotated by the guide of the partition wall 126.

The ultrasonic radiation frame 116 may include a flange portion 118 formed to protrude along the upper opening periphery of the insertion hole 117. The partition 126 may have a lower portion fixed and sealed to the flange portion 118 by an adhesive or the like. The partition wall 126 may be formed to be integral with the flange portion 118. Although not shown, the flange portion 118 may be provided with a supply port for supplying the ultrasonic transfer medium to the accommodation space 131, and a discharge port for discharging the ultrasonic transfer medium from the accommodation space 131.

The seal 160 for the imaging transducer is positioned toward the outer circumferential surface of the imaging transducer 150 to seal between the imaging transducer 150 and the partition 126. For example, as shown in FIGS. 8 and 9, the seal 160 for the imaging transducer may include at least two or more mounting grooves 161. The mounting grooves 161 are each formed concave along the circumferential direction from the outer circumferential surface of the imaging transducer 150. The seating grooves 161 are spaced apart from each other up and down.

The seals 166 are respectively seated in the mounting grooves 161 to seal between the imaging transducer 150 and the partition wall 126. With the imaging transducer 150 fitted in the partition 126, the seals 166 are deformed to be compressed into the mounting grooves 161, respectively. At this time, each inner circumferential surface of the sealing materials 166 is in close contact with the outer circumferential surface of the imaging transducer 150, and each outer circumferential surface of the sealing materials 166 is in close contact with the inner circumferential surface of the partition wall 126. The double sealing may be performed between the producer 150 and the partition wall 126. The sealing members 166 may be made of a material such as rubber having elasticity.

Each sealant 166 has two line contact portions spaced up and down on an inner circumferential face toward the imaging transducer 150 and two line contact portions spaced up and down on an outer circumferential face toward the partition 126. It may be made in the form having. For example, each of the seals 166 may be formed in a rectangular ring shape which is recessed in a circumferential direction on the inner circumferential surface facing the imaging transducer 150 and the outer circumferential surface facing the partition wall 126. In this case, the seating grooves 161 may be formed as rectangular grooves, respectively.

As described above, each sealant 166 has an effect of quadruple sealing between the imaging transducer 150 and the partition wall 126 by four line contact portions, and the adhesion force by the four line contact portions. By dispersing the rotation of the imaging transducer 150 can be smooth.

The seal 160 for the imaging transducer may include at least one pressure reducing groove 162. The pressure reducing groove 162 is formed concave along the circumferential direction from the outer circumferential surface of the imaging transducer 150. The pressure reducing groove 162 is disposed between the seating grooves 161. Therefore, even if a very strong pressure is applied to the membrane 130 so that the ultrasonic delivery medium 101 passes through the sealing material 166 located below the pressure reducing groove 162 and leaks a little, ultrasonic pressure is applied to the pressure reducing groove 162. Since the transfer medium 101 may be sufficiently stored, the pressure applied to the sealing material 166 located above the pressure reducing groove 162 may be reduced. Therefore, the sealing effect between the imaging transducer 150 and the partition wall 126 may be maximized.

Although the pressure reducing groove 162 is illustrated as a rectangular groove, it can be made of grooves of various shapes in the range of the above-described function. The pressure reducing groove 162 may be two or more.

As another example, although not shown, at least two or more mounting grooves 161 may be formed concavely along the circumferential direction from the inner circumferential surface of the partition wall 126 to seat the sealing members 166. In addition, the at least one pressure reducing groove 162 may be formed concave along the circumferential direction from the inner circumferential surface of the partition 126.

On the other hand, the high intensity focused ultrasound treatment head 100 may further include a clamp. The clamp may be positioned to correspond to the membrane seal 140 on the outer circumferential surface of the membrane 130 to tighten the membrane 130. Accordingly, the sealing effect may be further enhanced by increasing the adhesion of the first sealing protrusions 141 to the membrane 130 and the adhesion of the second sealing protrusions 142 to the housing 120. In addition, the effect of preventing the membrane 130 from falling downward from the housing 120 may be further increased.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

Claims

A high intensity focused ultrasound transducer having an ultrasonic radiating surface located at a bottom thereof;

A housing accommodating the high intensity focused ultrasound transducer in a lower opening such that the ultrasonic radiation plane is exposed;

A membrane formed to surround the lower opening of the housing and the outer circumferential surface to form an accommodation space for accommodating the ultrasonic transmission medium between the ultrasonic radiating surface and the membrane in close contact with the outer circumferential surface of the housing; And

A seal for the membrane located on an outer circumferential surface of the housing to seal between the membrane and the housing;

High intensity focused ultrasound treatment head comprising a.
The method of claim 1,

The membrane sealing portion,

And at least two first sealing protrusions protruding along the circumferential direction from the outer circumferential surface of the housing and spaced apart from each other up and down.
The method of claim 2,

The membrane sealing portion,

And at least one second sealing protrusion protruding along the circumferential direction from the inner circumferential surface of the membrane and disposed between the first sealing protrusions.
The method of claim 2,

The first sealing projections are high intensity focused ultrasound treatment head, characterized in that each made in the form of a progressively increasing protrusion length toward the upper side.
The method of claim 1,

The membrane sealing portion,

And at least two first sealing protrusions protruding along the circumferential direction from the inner circumferential surface of the membrane and spaced apart from each other up and down.
The method of claim 5,

The membrane sealing portion,

And at least one second sealing protrusion protruding along the circumferential direction from the outer circumferential surface of the housing and disposed between the first sealing protrusions.
The method of claim 1,

A high intensity focused ultrasound therapy head comprising a imaging transducer having a lower portion inserted through an insertion hole of the high intensity focused ultrasound transducer and positioned in the receiving space.
The method of claim 7, wherein

And a partition wall extending upwardly from the periphery of the insertion hole to surround the outer circumferential surface of the imaging transducer in the housing.
The method of claim 8,

And a sealing portion for an imaging transducer positioned on an outer circumferential surface of the imaging transducer to seal between the imaging transducer and the partition wall.
The method of claim 9,

The sealing portion for the imaging transducer,

And at least two or more seating grooves formed concave in a circumferential direction from an outer circumferential surface of the imaging transducer or an inner circumferential surface of the partition wall and spaced apart from each other in a vertical direction.
The method of claim 10,

And a sealant seated in each of the seating grooves to seal between the imaging transducer and the partition wall.
The method of claim 10,

The sealing portion for the imaging transducer,

A high intensity focused ultrasound therapy head comprising at least one pressure reducing groove disposed between the seating grooves and recessed in a circumferential direction from an outer peripheral surface of the imaging transducer or an inner peripheral surface of the partition wall. .
The method of claim 11,

The seal member has two line contact portions spaced up and down on an inner circumferential surface facing the imaging transducer and has two line contact portions spaced up and down on an outer circumferential surface facing the partition wall. High intensity focused ultrasound therapy head.
A high intensity focused ultrasound transducer having an ultrasonic radiating surface located at a bottom thereof;

A membrane formed to surround the ultrasonic radiation surface to form an accommodation space for receiving an ultrasonic transmission medium between the ultrasonic radiation surface;

An imaging transducer inserted through an insertion hole of the high intensity focused ultrasound transducer and positioned in the accommodation space;

A partition wall extending upward from a periphery of the insertion hole to surround an outer circumferential surface of the imaging transducer; And

A sealing portion for an imaging transducer positioned on an outer circumferential surface of the imaging transducer to seal between the imaging transducer and the partition wall;

High intensity focused ultrasound treatment head comprising a.
The method of claim 14,

The sealing portion for the imaging transducer,

And at least two or more seating grooves formed concave in a circumferential direction from an outer circumferential surface of the imaging transducer or an inner circumferential surface of the partition wall and spaced apart from each other in a vertical direction.
The method of claim 15,

And a sealant seated in each of the seating grooves to seal between the imaging transducer and the partition wall.
The method of claim 15,

The sealing portion for the imaging transducer,

A high intensity focused ultrasound therapy head comprising at least one pressure reducing groove disposed between the seating grooves and recessed in a circumferential direction from an outer peripheral surface of the imaging transducer or an inner peripheral surface of the partition wall. .
The method of claim 16,

The seal member has two line contact portions spaced up and down on an inner circumferential surface facing the imaging transducer and has two line contact portions spaced up and down on an outer circumferential surface facing the partition wall. High intensity focused ultrasound therapy head.