KR101808835B1

KR101808835B1 - High strength focused ultrasonic wave treatment head having improved sealing characteristic

Info

Publication number: KR101808835B1
Application number: KR1020167001121A
Authority: KR
Inventors: 박경모; 손건호
Original assignee: 알피니언메디칼시스템 주식회사
Priority date: 2013-09-12
Filing date: 2013-09-12
Publication date: 2017-12-13
Also published as: CN105530994A; WO2015037752A1; CN105530994B; KR20160025556A

Abstract

A high intensity focused ultrasound therapy head having improved sealing properties includes a high intensity focused ultrasound transducer, a housing, a membrane, and a seal for the membrane. The high-intensity focused ultrasonic transducer is located at the bottom of the ultrasonic wave emitting surface. The housing accommodates a high intensity focusing ultrasonic transducer in the lower opening to expose the ultrasonic wave emitting surface. The membrane encloses the lower opening and the outer circumferential surface of the housing and forms a receiving space for receiving the ultrasonic transmission medium between the ultrasonic wave emitting surface and the outer circumferential surface of the housing. The seal for the membrane is located on the outer circumferential side of the housing and seals between the membrane and the housing.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high intensity focused ultrasound treatment head having improved sealing properties,

The present invention relates to a high-intensity focused ultrasound treatment head used for treating high-intensity ultrasound energy by collecting high-energy ultrasound energy at a focus.

High-Intensity Focused Ultrasound (HIFU) is a procedure that burns lesions in the body using high-intensity heat of 65 to 100 degrees Celsius, which occurs when focusing high-intensity ultrasound energy in one place. In other words, if the ultrasound strong enough to be about 100,000 times stronger than the ultrasonic intensity used in diagnosis is focused on one spot, heat is generated in the focus region, and the heat can be used to burn out the lesion tissue in the body.

Ultrasound itself is harmless to the human body and generates heat only at the focal point where the ultrasonic waves are concentrated, so that the lesion in the body can be treated non-invasively. High-intensity focused ultrasound therapy is available for pancreatic cancer, uterine myoma, and liver cancer, and active research is being conducted on prostate cancer, endometrial cancer, kidney cancer, breast cancer, soft tissue tumor, and bone tumor.

For example, the high intensity focused ultrasound therapy head has a high intensity focused ultrasound transducer at its end. The high intensity focused ultrasonic transducer is configured to emit high intensity focused ultrasonic waves. The ultrasound emission surface of a high-intensity focused ultrasonic transducer is covered by a membrane. Then, the space formed between the ultrasonic wave emitting surface and the membrane is filled with the ultrasonic wave transmission medium. Generally, deaerated water is used as an ultrasonic transmission medium. In addition, the high-intensity focused ultrasound therapy head may include an imaging transducer for acquiring diagnostic images. The imaging transducer is inserted into a high-intensity focused ultrasonic transducer so that the lower portion of the imaging transducer passes through the high-intensity focused ultrasonic transducer and is located in the space between the ultrasonic wave emitting surface and the membrane.

The high-intensity focused ultrasound treatment head emits a high-intensity focused ultrasound through the ultrasound emitting surface of the high-intensity focusing ultrasonic transducer in a state where the high-intensity focused ultrasound treatment head is positioned at the upper part of the patient and the membrane is in close contact with the patient's skin. High intensity focused ultrasound is then transmitted to the lesion site of the patient through the water between the ultrasonic wavefront and the membrane.

According to the related art, the edge of the membrane is sealed and bonded to the edge portion of the high-intensity focusing ultrasonic transducer by a sealing mechanism so that the filled water is not leaked between the membrane and the ultrasonic wave emitting surface. However, as described above, when excessive pressure is applied to the water in the course of closely attaching the membrane to the patient's skin during high intensity focused ultrasound therapy, there is a high possibility that water leaks through the combined region of the membrane and the high-intensity focusing ultrasonic transducer . Therefore, the sealing treatment of the combined area of the membrane and the high intensity focused ultrasonic transducer is important.

Further, the imaging transducer can be rotated to obtain a diagnostic image in a state of being fitted to the high-intensity focused ultrasonic transducer. In this case, the combined area of the imaging transducer and the high-intensity focusing ultrasonic transducer must be sealed so that water is not leaked and the imaging transducer smoothly rotates.

The object of the present invention is to provide a high strength ultrasound therapy head capable of enhancing the effect of preventing leakage of the ultrasound transmission medium.

According to an aspect of the present invention, there is provided a high-intensity focused ultrasound treatment head including a high-intensity focusing ultrasonic transducer, a housing, a membrane, and a seal for the membrane. The high-intensity focused ultrasonic transducer is located at the bottom of the ultrasonic wave emitting surface. The housing accommodates a high intensity focusing ultrasonic transducer in the lower opening to expose the ultrasonic wave emitting surface. The membrane encloses the lower opening and the outer circumferential surface of the housing and forms a receiving space for receiving the ultrasonic transmission medium between the ultrasonic wave emitting surface and the outer circumferential surface of the housing. The seal for the membrane is located on the outer circumferential side of the housing and seals between the membrane and the housing.

The high intensity focused ultrasound therapy 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 ultrasonic transducer is located at the bottom of the ultrasonic wave emitting surface. The imaging transducer is configured to surround the ultrasonic wave emitting surface to form a receiving space for receiving the ultrasonic wave transmitting medium between the ultrasonic wave emitting surface and the ultrasonic wave emitting surface. The imaging transducer is inserted through the insertion hole of the high-intensity focusing ultrasonic transducer and positioned in the receiving space. The partition wall extends upward from the periphery of the insertion hole to surround the outer circumferential surface of the imaging transducer. The seal for the imaging transducer is located on the outer circumferential side of the imaging transducer and seals between the imaging transducer and the bulkhead.

According to the present invention, even when an excessive pressure is applied to the ultrasonic transmission medium in the process of closely contacting the membrane to the patient's skin during the high-intensity focused ultrasonic treatment, the effect of preventing leakage of the ultrasonic transmission medium can be enhanced. As a result, stability can be enhanced in high intensity focused ultrasound therapy.

According to the present invention, it is possible to smooth the rotation of the imaging transducer while enhancing the sealing effect of the imaging transducer. Further, according to the present invention, it is possible to easily assemble or disassemble the sealing portion and to enhance convenience for the user, in addition to a reliable sealing effect.

1 is a cross-sectional view of a high intensity focused ultrasound therapy head according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view showing the state before the ultrasonic transmission medium is filled in the accommodation space in Fig. 1. Fig.
3 is an enlarged cross-sectional view of the region A in Fig.
Fig. 4 is an exploded perspective view of the housing and the membrane shown in Fig.
Fig. 5 is a perspective view enlargedly showing a region C in Fig. 4. Fig.
FIG. 6 is a cross-sectional view illustrating a housing having a membrane sealing portion according to another embodiment and a membrane portion.
Fig. 7 is a cross-sectional view showing the state in which the space between the housing and the membrane is sealed by the first sealing projections and the second sealing projection in Fig. 6;
FIG. 8 is a cross-sectional view of the region B shown in FIG. 1 in an enlarged view. FIG.
FIG. 9 is an exploded perspective view showing the imaging transducer and the sealing materials in an exploded manner in FIG.

The present invention will now be described in detail with reference to the accompanying drawings. Here, the same reference numerals are used for the same components, and a detailed description of known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

1 is a cross-sectional view of a high intensity focused ultrasound therapy head according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing the state before the ultrasonic transmission medium is filled in the accommodation space in Fig. 1. Fig.

1 and 2, a high-intensity focusing ultrasound treatment head 100 includes a high-intensity focusing ultrasonic transducer 110, a housing 120, a membrane 130, and a sealing portion 140 for a membrane .

The high intensity focused ultrasound transducer (110) emits high intensity focused ultrasound for patient treatment. The high intensity focusing ultrasonic transducer 110 may be positioned at the lower end of the ultrasonic wave emitting surface 110a. For example, the high-intensity focusing ultrasonic transducer 110 may include an ultrasonic wave generating unit 111 and an ultrasonic wave emitting frame 116. The ultrasonic wave generating unit 111 may be mounted on the ultrasonic wave emitting frame 116. Although not shown, the ultrasonic wave generator 111 can be electrically connected to the drive circuit board by wiring or the like.

The ultrasonic wave generator 111 may include a piezoelectric element. When a voltage is applied by the driver circuit substrate, the piezoelectric element resonates and generates ultrasonic waves. Piezoelectric elements can be composed of piezoelectric ceramics such as lead zirconate titanate (PZT), single crystals, and composite piezoelectric materials obtained by combining these materials with polymer materials. In addition, the ultrasonic wave generator 111 may include an acoustic matching layer positioned on one side of the piezoelectric element and capable of appropriately setting resonance characteristics. The ultrasonic wave generator 111 may be configured in various forms within a range capable of generating high-intensity ultrasonic waves, and thus is not limited to the illustrated example.

The ultrasonic wave radiation frame 116 focuses and emits high-intensity ultrasonic waves generated from the ultrasonic wave generator 111. The ultrasound emission frame 116 may have a predetermined thickness and the central portion may be convex upward. The lower surface of the ultrasonic wave emitting frame 116 corresponds to the ultrasonic wave emitting surface 110a.

The housing 120 accommodates the high-intensity focusing ultrasonic transducer 110 in the lower opening so that the ultrasonic wave emitting surface 110a is exposed. The housing 120 may have a cylindrical shape having an inner space and an open bottom side. The lower opening of the housing 120 can be closed by the rim of the ultrasonic radiation frame 116 in the periphery.

The membrane 130 surrounds the lower opening and the outer circumferential surface of the housing 120 and forms an accommodation space 131 for accommodating the ultrasonic wave transmission medium 101 between the membrane 130 and the ultrasonic wave emitting surface 110a. For example, the membrane 130 may have a hollow shape with a cylindrical shape and an open top side. The membrane 130 may be fitted into the housing 120 from the lower side thereof so as to surround the lower opening and the outer circumferential surface of the housing 120. The ultrasonic transmission medium 101 may be made of deaerated water or the like.

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

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

The membrane 130 may have a thicker portion that surrounds the outer peripheral surface of the housing 120 than a portion surrounding the lower opening of the housing 120. Accordingly, the membrane 130 can maintain a more rigid shape when the outer circumferential surface of the housing 120 is wrapped. The sealing portion 140 for the membrane is located on the outer circumferential surface side of the housing 120 and seals the space between the membrane 130 and the housing 120. The ultrasonic wave transmission medium 101 filled between the membrane 130 and the ultrasonic wave emitting surface 110a may not leak through the joint between the membrane 130 and the housing 120. [

The membrane 130 extends from the portion surrounding the lower opening of the housing 120 to surround the outer circumferential surface of the housing 120 to cover the ultrasonic wave emitting surface 110a and the outer circumferential surface of the housing 120 Is sealed to the housing 120 by the sealing portion 140 for the membrane. Accordingly, when the lower portion of the membrane 130 is pressed to apply pressure to the ultrasonic wave transmission medium 101, the pressure can be dispersed to the peripheral portion of the membrane 130, so that the sealing effect can be enhanced.

The ultrasonic wave propagating medium leaked from the edge of the ultrasonic wave emitting surface 110a is not transmitted to the sealing portion located on the outer circumferential surface side of the housing 120, The distance traveled can be long. Therefore, even when excessive pressure is applied to the ultrasonic transmission medium 101 in the process of closely contacting the membrane 130 with the patient's skin during the high-intensity focused ultrasonic treatment, the ultrasonic transmission medium 101 can be transmitted through the combined area of the membrane 130 and the housing 120 The effect of preventing leakage of the liquid crystal 101 can be enhanced.

For example, referring to FIGS. 3 to 5 together with FIG. 1, a seal 140 for a membrane may include at least two or more first sealing protrusions 141. The first sealing protrusions 141 protrude in the circumferential direction from the outer circumferential surface of the housing 120 and can be vertically spaced from each other. When the inner circumferential surface of the membrane 130 is brought into close contact with the outer circumferential surface of the housing 120, the membrane 130 has a shape corresponding to the first sealing protrusions 141 in the form of the first sealing protrusions 141 So that the first sealing protrusions 141 are forcedly inserted. Accordingly, the space between the membrane 130 and the housing 120 can be doubly sealed at the outer peripheral surface of the housing 120.

The first sealing protrusions 141 may be formed in such a manner that the protrusion length gradually increases toward the upper side. Accordingly, the effect of preventing leakage of the ultrasonic wave transmission medium 101 can be enhanced. In addition, since the membrane 130 may be increased in area to be engaged with the first sealing protrusions 141, it is possible to prevent the membrane 130 from falling down from the state of being coupled to the housing 120. Although two first sealing projections 141 are illustrated, three or more first sealing projections 141 are possible.

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

When the inner circumferential surface of the membrane 130 is brought into close contact with the outer circumferential surface of the housing 120, the second sealing protrusions 142 are deformed so as to be pressed onto the outer circumferential surface of the housing 120, do. The second sealing protrusions 142 are disposed between the first sealing protrusions 141 to seal the membrane 130 and the housing 120 once again so that the membrane 130 and the housing 120 Can be sealed in triplicate. Therefore, the effect of sealing between the membrane 130 and the housing 120 can be further enhanced. The second sealing protrusions 142 are illustrated as having a shape having a substantially semicircular cross section, but needless to say, the second sealing protrusions 142 may have various shapes. Further, the number of the second sealing projections 142 may be two or more.

Since the membrane 130 can be sealed and fixed between the membrane 130 and the housing 120 through the process of inserting the membrane 130 from the lower side of the housing 120, It is possible to increase convenience.

6 and 7, the at least two first sealing protrusions 241 protrude in the circumferential direction from the inner circumferential surface of the membrane 130 and may be spaced apart from each other in the up-and-down direction. 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 be pressed onto the outer circumferential surface of the housing 120. The first sealing protrusions 241 may be formed in such a manner that the protrusion length gradually increases toward the upper side.

At least one second sealing protrusion 242 protrudes from the outer circumferential surface of the housing 120 along the circumferential direction. 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 portion of the membrane 130 corresponding to the second sealing protrusion 242 is in the form of the second sealing protrusion 242 So that the second sealing protrusion 242 is forcedly fitted. Accordingly, the space between the membrane 130 and the housing 120 can be sealed. It is needless to say that the sealing portion for the membrane can be formed in various forms without being limited to these examples.

1, the high intensity focused ultrasound therapy head 100 may include an imaging transducer 150. [ In this case, the high intensity focused ultrasound therapy head 100 may include a seal 160 for an imaging transducer.

The imaging transducer 150 is for acquiring a diagnostic image for the subject. The practitioner can perform high intensity focused ultrasound therapy while confirming the diagnostic image acquired by the imaging transducer 150. [

The imaging transducer 150 may be configured to transmit an ultrasound signal to the subject and to receive ultrasound signals reflected from the subject. For example, the imaging transducer 150 may be configured such that a piezoelectric element or the like is embedded in a cylindrical casing. The ultrasonic waves can 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 focusing ultrasonic transducer 110 and positioned in the accommodation space. The insertion hole 117 may be formed at a central portion of the ultrasonic radiation frame 116. In the housing 120, a partition wall 126 for supporting the imaging transducer 150 may be provided. The partition wall 126 extends upwardly from the periphery of the insertion hole 117 so as to surround the periphery of the imaging transducer 150 in the housing 120. The imaging transducer 150 is capable of obtaining a diagnostic image while being rotated in accordance with necessity in a state where the imaging transducer 150 is fitted to the ultrasonic radiation frame 116. At this time, the imaging transducer 150 can be rotated by the guidance of the partition 126.

The ultrasound emission frame 116 may include a flange portion 118 protruding along the upper opening periphery of the insertion hole 117. The lower portion of the partition wall 126 can be fixed and sealed to the flange portion 118 with an adhesive or the like. The barrier rib 126 may be formed integrally with the flange portion 118. Although not shown, the flange portion 118 may be formed with a supply port for supplying the ultrasonic transmission medium to the accommodation space 131 and a discharge port for discharging the ultrasonic transmission medium from the accommodation space 131.

The sealing portion 160 for the imaging transducer is located on the outer circumferential surface side of the imaging transducer 150 and seals between the imaging transducer 150 and the partition wall 126. For example, as shown in Figs. 8 and 9, the sealing portion 160 for the imaging transducer may include at least two seating grooves 161. Fig. The seating grooves 161 are formed concavely in the circumferential direction from the outer peripheral surface of the imaging transducer 150, respectively. The seating grooves 161 are vertically spaced from each other.

The sealing members 166 are respectively seated in the seating grooves 161 to seal between the imaging transducer 150 and the partition wall 126. In a state in which the imaging transducer 150 is fitted in the partition wall 126, the sealing materials 166 are compressed and deformed into the seating grooves 161, respectively. At this time, the inner circumferential surfaces of the sealing materials 166 are in close contact with the outer circumferential surface of the imaging transducer 150, and the outer circumferential surfaces of the sealing materials 166 are in close contact with the inner circumferential surface of the partition wall 126, The gap between the ducer 150 and the partition wall 126 can be doubly sealed. The sealing members 166 may be made of rubber or the like having elasticity.

Each sealing member 166 has two line contact portions spaced up and down on the inner circumferential surface toward the imaging transducer 150 and two line contact portions spaced vertically on the outer circumferential surface toward the partition wall 126 . &Lt; / RTI > For example, each sealing material 166 may be formed in a rectangular ring shape having a concave groove along the circumferential direction on the inner peripheral surface toward the imaging transducer 150 and the outer peripheral surface toward the partition wall 126. In this case, the seating grooves 161 may each be formed into a rectangular groove.

As described above, each sealing member 166 has the effect of quadrupling sealing between the imaging transducer 150 and the partition wall 126 by the four line contact portions, and by the four line contact portions, The rotation of the imaging transducer 150 can be smoothly performed.

The sealing portion 160 for the imaging transducer may include at least one pressure reducing groove 162. The pressure reducing groove 162 is formed concavely along the circumferential direction from the outer circumferential surface of the imaging transducer 150. The pressure reducing grooves 162 are disposed between the seating grooves 161. Therefore, even if a very strong pressure is applied to the membrane 130 and the ultrasonic transmission medium 101 leaks through the seal member 166 located under the pressure decreasing groove 162, The pressure of the sealing material 166 located above the pressure reducing groove 162 can be reduced since the transferring medium 101 can be sufficiently stored. Therefore, the sealing effect between the imaging transducer 150 and the partition wall 126 can be maximized.

The pressure decreasing groove 162 is illustrated as a square groove, but it is needless to say that the pressure decreasing groove 162 may be formed in a variety of grooves in the above-described functional categories. At least two pressure reduction grooves 162 are possible.

As another example, although not shown, at least two seating grooves 161 may be formed in the circumferential direction from the inner circumferential surface of the partition wall 126, respectively, so as to be recessed to seat the sealing materials 166. In addition, at least one pressure reducing groove 162 may be formed concavely along the circumferential direction from the inner circumferential surface of the partition wall 126.

On the other hand, the high-intensity focused ultrasound therapy head 100 may further include a clamp. The clamp may be positioned correspondingly to the membrane seal 140 at the outer circumferential surface of the membrane 130 to tighten the membrane 130. Therefore, the sealing force of the first sealing protrusions 141 against the membrane 130 and the sealing force of the second sealing protrusion 142 with respect to the housing 120 can be increased to further enhance the sealing effect. In addition, the effect of preventing the membrane 130 from falling down from the housing 120 can be further enhanced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will recognize that various modifications and equivalent arrangements may be made therein. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

Claims

A high intensity focused ultrasound transducer positioned at the bottom of the ultrasound imaging plane;
A housing for accommodating the high-intensity focusing ultrasonic transducer in a lower opening so that the ultrasonic wave emitting surface is exposed;
A membrane enclosing a lower opening and an outer circumferential surface of the housing to form a receiving space for receiving an ultrasonic wave transmission medium between the ultrasonic wave transmitting surface and the outer circumferential surface of the housing;
A seal disposed on an outer circumferential surface of the housing to seal between the membrane and the housing;
An imaging transducer in which a lower portion is located in the accommodation space;
A barrier surrounding the outer circumferential surface of the imaging transducer; And
And a seal for an imaging transducer sealing between the imaging transducer and the partition,
Wherein the sealing portion for the imaging transducer comprises:
And at least one pressure reducing groove disposed between the seating grooves for recessing the sealing material from the outer circumferential surface of the imaging transducer or from the inner circumferential surface of the partition wall in the circumferential direction, High intensity focused ultrasound therapy head.

The method according to claim 1,
Wherein the seal for the membrane comprises:
And at least two or more first sealing protrusions protruding from an outer circumferential surface of the housing in a circumferential direction and spaced apart from each other in an up-and-down direction.

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

3. The method of claim 2,
Wherein the first sealing protrusions are formed in such a manner that the protrusion length gradually increases toward the upper side.

The method according to claim 1,
Wherein the seal for the membrane comprises:
And at least two first sealing projections projecting from the inner circumferential surface of the membrane along the circumferential direction and spaced apart from each other in the vertical direction.

6. The method of claim 5,
Wherein the seal for the membrane comprises:
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.

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The method according to claim 1,
Wherein the sealing material has two line contact portions vertically spaced apart from each other on an inner circumferential surface facing the imaging transducer and two line contact portions vertically spaced on an outer circumferential surface toward the partition wall High intensity focused ultrasound therapy head.

A high intensity focused ultrasound transducer positioned at the bottom of the ultrasound imaging plane;
A membrane that surrounds the ultrasonic wave emitting surface and forms a receiving space for receiving an ultrasonic wave transmission medium between the ultrasonic wave emitting surface and the ultrasonic wave emitting surface;
An imaging transducer inserted through the insertion hole of the high-intensity focusing ultrasonic transducer and positioned in the accommodation space;
A partition wall extending upward from the periphery of the insertion hole to surround an outer circumferential surface of the imaging transducer; And
And a seal for an imaging transducer positioned on an outer circumferential surface of the imaging transducer to seal between the imaging transducer and the septum,
Wherein the sealing portion for the imaging transducer comprises:
And at least one pressure reducing groove disposed between the seating grooves for recessing the sealing material from the outer circumferential surface of the imaging transducer or from the inner circumferential surface of the partition wall in the circumferential direction, High intensity focused ultrasound therapy head.

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15. The method of claim 14,
Wherein the sealing material has two line contact portions vertically spaced apart from each other on an inner circumferential surface facing the imaging transducer and two line contact portions vertically spaced on an outer circumferential surface toward the partition wall High intensity focused ultrasound therapy head.