Applicator

Abstract

The present application belongs to the technical field of medical apparatus and provides a treatment device, which comprises a beam limiter, a uniform assembly and an outer cover. The beam limiter has a beam channel for the electron beam to pass through. The uniform assembly is arranged at the end of the beam limiter and has a radiation cavity in communication with the beam channel. The outer cover is made of radiation shielding material and is sleeved on the outside of the uniform assembly. The outer cover is provided with a notch for the electron beam to project. The treatment device of the present application only needs to aim the notch at the patient's lesion before irradiation treatment, and then inject the electron beam, so as to maximize the irradiation of the lesion while reducing the radiation dose to the healthy tissues of the human body, and significantly reduce the toxic and side effects of radiotherapy.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an applicator. Background Technology

[0002] The applicator can generate a spherical dose distribution conformally to the radiotherapy target area, delivering a single high-dose radiotherapy during surgery. This effectively improves local tumor control rates, reduces X-ray side effects, protects surrounding normal tissues, and shortens treatment time, demonstrating excellent safety, effectiveness, and reliability. However, for some spherical tumors with asymmetrical lesion distribution, existing applicators distribute the radiation dose uniformly along their surface during treatment. This results in other normal organs near the lesion receiving the same dose, which is detrimental to disease control and can cause unnecessary damage to normal tissues. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies, the present invention provides a treatment device that aims to solve the technical problem that existing treatment devices also expose other normal organs near the lesion to the same dose of radiation during treatment, resulting in unnecessary damage to normal tissues.

[0004] To achieve the above objectives, the present invention provides a treatment device, which includes a beam limiter, a homogenizing component, and an outer cover. The beam limiter has a beam channel for electron beams to pass through inside. The homogenizing component is disposed at the end of the beam limiter and has a radiation cavity communicating with the beam channel inside. The outer cover is made of radiation shielding material and is fitted on the outside of the homogenizing component. The outer cover has a notch for electron radiation projection.

[0005] In an embodiment of the present invention, the equalization component includes a housing body and an equalization block. The housing body is disposed at the end of the beam limiter, and the equalization block is placed inside the housing body and has a radiation cavity. The radiation cavity is connected to the beam channel. The equalization block can adjust the electron radiation intensity and form a uniform dose distribution on the surface of the housing body that is consistent with the shape of the housing.

[0006] In embodiments of the present invention, the outer shell body is spherical, hemispherical, spherical indentation, ellipsoidal, or other spherical shapes.

[0007] In an embodiment of the present invention, a scattering foil is further provided between the radiation cavity and the beam channel, the scattering foil being used to scatter the electron beam of the beam channel into the radiation cavity.

[0008] In an embodiment of the present invention, the outer cover includes a first cover portion and a second cover portion, which are detachably assembled and used to be fitted onto the outside of the outer shell body, and a notch is provided on the first cover portion or the second cover portion.

[0009] In an embodiment of the present invention, a first connecting portion and a second connecting portion are respectively provided on the first cover portion and the second cover portion, and both the first connecting portion and the second connecting portion are provided with connecting holes, and the connecting holes on the first connecting portion and the second connecting portion are connected by threaded connectors.

[0010] In an embodiment of the present invention, the notch in the outer cover is also covered with a component made of a material that is easily transmissible to radiation.

[0011] In embodiments of the present invention, the part made of a material that is easily transmissible to radiation is an aluminum part or a polyethylene part.

[0012] In embodiments of the present invention, the radiation shielding material is a material component that provides good shielding against radiation used in treatment, such as metals or alloys like lead, tantalum, titanium, and tungsten.

[0013] In an embodiment of the present invention, the channel wall of the beam channel is made of radiation shielding material.

[0014] In embodiments of the present invention, the shape, size, and position of the notch in the outer cover are matched with the shape, size, and position of the clinically treated lesion to achieve effective treatment of the lesion while protecting the surrounding normal tissue.

[0015] Through the above technical solutions, the applicator provided in the embodiments of the present invention has the following beneficial effects:

[0016] After the electron beam emitted by the linear accelerator enters the beam channel of the beam limiter, it enters the radiation cavity of the homogenizing component. The homogenizing component can adjust the electron radiation within the radiation cavity to a uniform and isodose distribution along the outer surface of the homogenizing component. Since the outer cover is made of radiation shielding material and is fitted onto the outside of the homogenizing component, and the outer cover has a notch, the isodose-uniformly distributed radiation on the outside of the homogenizing component can only exit through the notch on the outer cover, thereby achieving directional control of the radiation area. That is, the treatment device in this invention only needs to align the notch with the patient's lesion before irradiation treatment, and then inject the electron beam, so as to maximize the irradiation of the lesion while reducing the radiation dose to healthy tissues, significantly reducing the toxic side effects of radiotherapy.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof.

[0019] In the picture:

[0020] Figure 1 This is a schematic cross-sectional view of the applicator according to an embodiment of the present invention;

[0021] Figure 2 This is an exploded structural diagram of the applicator according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Beam limiter; 11. Beam channel

[0024] 2. Equalizing component 21. Outer shell body

[0025] 22 Uniform 221 Radiation Cavity

[0026] 3. Outer cover 31 notch

[0027] 32 First cover part 321 First connecting part

[0028] 33 Second cover part 331 Second connecting part

[0029] 34 Connecting holes 4 Scattering foil Detailed Implementation

[0030] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] The applicator of the present invention will now be described with reference to the accompanying drawings.

[0032] This invention provides an applicator, such as Figure 1 and Figure 2 As shown, the treatment device includes:

[0033] The beam limiter 1 has a beam channel 11 formed inside for the electron beam to pass through;

[0034] The equalization component 2 is disposed at the end of the beam limiter 1 and has a radiation cavity 221 formed inside it, which communicates with the beam channel 11; and

[0035] The outer cover 3 is made of radiation shielding material and is fitted on the outside of the equalization component 2. The outer cover 3 has a notch 31 for electron radiation projection.

[0036] After the electron beam emitted by the linear accelerator enters the beam channel 11 of the beam limiter 1, it enters the radiation cavity 221 of the homogenizing component 2. The homogenizing component 2 can adjust the electron radiation in the radiation cavity 221 to a uniform and equal dose distribution along the outer surface of the homogenizing component 2. Since the outer cover 3 is made of radiation shielding material and is fitted on the outside of the homogenizing component 2, and the outer cover 3 has a notch 31, the uniformly distributed radiation on the outside of the homogenizing component 2 can only be emitted through the notch 31 on the outer cover 3, thereby achieving directional control of the radiation area. That is, the applicator in this invention only needs to align the notch 31 with the patient's lesion before irradiation treatment, and then inject the electron beam, so as to maximize the irradiation of the lesion while reducing the radiation dose to healthy human tissues, and significantly reduce the toxic side effects of radiotherapy.

[0037] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the equalization component 2 includes a housing body 21 and an equalization block 22. The housing body 21 is disposed at the end of the beam limiter 1, and the equalization block 22 is disposed inside the housing body 21 and has a radiation cavity 221. The radiation cavity 221 is connected to the beam channel 11. The equalization block 22 can adjust the electron radiation intensity and form a uniform dose distribution on the surface of the housing body that is consistent with the shape of the housing. After being equalized by the equalization block 22, the electron radiation in the radiation cavity 221 is transmitted to the outer surface of the housing body 21 and is evenly distributed along its surface. The housing body 21 facilitates connection with the beam limiter 1 and facilitates fixation of the equalization block 22.

[0038] like Figure 1 and Figure 2 As shown, in the embodiments of the present invention, the outer shell body 21 can be a sphere, hemisphere, spherical segment, ellipsoid, or other spherical shape. In this case, the electron radiation after homogenization will be distributed in a spherical pattern. The outer shell body 21 can also be other shapes, such as cylinder, cube, cuboid, etc. In this case, the shape of the homogenizing block 22 needs to be changed accordingly.

[0039] It should be noted that the outer shell 21 and the leveling block 22 are in a state of tight fit or fixed connection, and the two are always relatively fixed.

[0040] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, a scattering foil 4 is further provided between the radiation cavity 221 and the beam channel 11. The scattering foil 4 is used to scatter the electron beam from the beam channel 11 into the radiation cavity 221. The electron beam emitted by the electron decelerator is linear. By providing the scattering foil 4, the direction of movement of the electron beam can be changed, thereby increasing the scattering range of the electron beam in the radiation cavity 221, and thus ensuring the uniformity effect of the uniformizing block 22.

[0041] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the outer cover 3 includes a first cover portion 32 and a second cover portion 33. The first cover portion 32 and the second cover portion 33 are detachably assembled and used to be fitted onto the outside of the outer shell body 21. A notch 31 is provided on the first cover portion 32 or the second cover portion 33. By configuring the outer cover 3 as a detachable first cover portion 32 and a second cover portion 33, the installation of the outer cover 3 on the outside of the outer shell body 21 is facilitated.

[0042] like Figure 1 and Figure 2 As shown in the embodiment of the present invention, the first cover portion 32 and the second cover portion 33 are respectively provided with a first connecting portion 321 and a second connecting portion 331. Both the first connecting portion 321 and the second connecting portion 331 are provided with connecting holes 34, which are connected by threaded connectors. That is, the first cover portion 32 and the second cover portion 33 can be detachably connected by threaded connectors. Preferably, the first connecting portion 321 and the second connecting portion 331 are plate-shaped structures; however, they can also be connected in other ways, such as by snap-fit ​​connections.

[0043] In an embodiment of the present invention, the notch 31 of the outer cover 3 is also covered with a component made of a radiation-transmissible material. The notch 31 is the radiation projection area of ​​the entire treatment device. By covering the notch 31 with a structural component supported by a radiation-transmissible material, a completely sealed cover can be formed on the outer surface of the outer cover 3 while ensuring the radiation intensity of the notch 31, thereby ensuring the sealing of the homogenization component 2 inside the outer cover 3. Of course, no material may be provided on the notch 31.

[0044] In an embodiment of the present invention, the outer cover 3 and the outer shell body 21 can be tightly fitted together to ensure their relative fixation.

[0045] In an embodiment of the present invention, the outer cover 3 can be customized in advance according to the patient's needs. For different patients, only the outer cover 3 needs to be replaced to achieve customized treatment for different conditions.

[0046] In embodiments of the present invention, the part made of a material that is easily transmissible to radiation can be an aluminum part or a polyethylene part.

[0047] Furthermore, components made of materials that are easily transmissible to radiation can be metals, alloys, or polymers with low atomic numbers.

[0048] In embodiments of the present invention, the radiation shielding material is a material component that provides good shielding against radiation used in treatment, such as metals or alloys like lead, tantalum, titanium, and tungsten.

[0049] In an embodiment of the present invention, the channel wall of the beam channel 11 can be made of radiation shielding material to prevent the electron beam from radiating as it passes through the time-limited beamer 1 in the beam channel 11.

[0050] In an embodiment of the present invention, the shape, size and position of the notch 31 of the outer cover 3 are matched with the shape, size and position of the clinically treated lesion, so as to achieve effective treatment of the lesion while protecting the surrounding normal tissue.

[0051] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Although embodiments of the present invention have been described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A treatment device, characterized in that, The applicator includes: The beam limiter (1) has a beam channel (11) inside for the electron beam to pass through. A homogenizing component (2) is disposed at the end of the beam limiter (1) and has a radiation cavity (221) internally communicating with the beam channel (11); and The outer cover (3) is a radiation shielding material and is fitted on the outside of the homogenizing component (2). The outer cover (3) has a notch (31) for electron radiation projection. The equalization component (2) includes an outer shell body (21) and an equalization block (22). The outer shell body (21) is disposed at the end of the beam limiter (1). The equalization block (22) is placed inside the outer shell body (21) and has the radiation cavity (221). The radiation cavity (221) is connected to the beam channel (11). The equalization block (22) can uniformly project the electron radiation of the radiation cavity (221) onto the surface of the outer shell body (21). The outer cover (3) includes a first cover part (32) and a second cover part (33). The first cover part (32) and the second cover part (33) are detachably assembled and used to be sleeved on the outside of the outer shell body (21). The notch (31) is provided on the first cover part (32) or the second cover part (33). The shape, size and position of the notch (31) of the outer cover (3) are matched with the shape, size and position of the clinically treated lesion to achieve effective treatment of the lesion while protecting the surrounding normal tissue.

2. The applicator according to claim 1, characterized in that, The outer shell body (21) is spherical, hemispherical, spherical, or ellipsoidal.

3. The applicator according to claim 1, characterized in that, A scattering foil (4) is also provided between the radiation cavity (221) and the beam channel (11), the scattering foil (4) being used to scatter the electron beam of the beam channel (11) into the radiation cavity (221).

4. The applicator according to claim 1, characterized in that, The first cover portion (32) and the second cover portion (33) are respectively provided with a first connecting portion (321) and a second connecting portion (331). Both the first connecting portion (321) and the second connecting portion (331) are provided with connecting holes (34). The connecting holes (34) on the first connecting portion (321) and the second connecting portion (331) are connected by threaded connectors.

5. The applicator according to claim 1, characterized in that, The notch (31) of the outer cover (3) is also covered with a material that is easily transmissible to radiation.

6. The applicator according to claim 5, characterized in that, The material used for the easily transmissible radiation is either aluminum or polyethylene.

7. The applicator according to any one of claims 1 to 6, characterized in that, The radiation shielding material is a material component that provides good shielding against the radiation used in the treatment, and the radiation shielding material is lead, tantalum, titanium or tungsten.

8. The applicator according to any one of claims 1 to 6, characterized in that, The channel wall of the beam channel (11) is made of the radiation shielding material.

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