KR101915397B1 - Applicator capable of measuring radiation dose - Google Patents

Abstract

According to the present invention, disclosed is an applicator for measuring doses, comprising: a body unit having a hollow pipe shape; a radiation unit installed in the body unit for irradiating radiation; measurement units having a plurality of measurement units disposed in multiple lines and layers in the longitudinal direction of the body unit to measure radiation doses irradiated from the radiation unit at a plurality of points; and a fixing unit fixing the posture of the measurement unit with respect to the body unit. The plurality of measurement units have a scintillation counter so that dosimetry is possible. Accordingly, contact radiation treatment and precise dosimetry are possible without additional devices, thereby increasing reliability in accordance with an increase in precision of the treatment.

Description

[0001] APPLICATOR CAPABLE OF MEASURING RADIATION DOSE [0002]

The present invention relates to an applicator capable of measuring a dose, and more particularly, to an applicator capable of measuring a dose so as to accurately measure a dose to be inserted into a human body and to be irradiated close to the body.

Remote radiotherapy and brachytherapy are common methods of radiation therapy for cancer patients. Here, the remote radiotherapy is a treatment for removing cancer cells by irradiating the patient with radiation from the outside of the patient, and the proximity radiotherapy is a treatment for removing cancer cells in the body by inserting a radioisotope into the internal body of the patient .

On the other hand, external beam radiotherapy using a linear accelerator is generally performed after confirming that the dose reaches the desired site for quality control of the patient's dose before treatment. Accordingly, in the case of close-up radiation therapy in which a radioactive isotope for directing radiation is directly inserted into a human body, it is necessary to control the quality of the patient's treatment dose before the treatment and dose control to confirm whether the dose has been transmitted correctly during the treatment.

However, in the case of the proximity radiotherapy, since the equipment for detecting the dose received by the patient is not available, it is difficult to manage the dose separately. Also, in actual patient treatment, although the dose may be changed due to various situations such as unexpected movement of the patient, quick response to the radiation accident is low.

Accordingly, in recent years, various researches have been continuously carried out to improve the accuracy of radiation treatment and management through accurate measurement of the radiation dose applied to patients.

Japanese Patent No. 3057168 Korean Patent No. 10-0613244

It is an object of the present invention to provide an applicator capable of measuring a radiation dose close to a lesion of a patient by providing a measuring unit having a scintillation counter on an applicator inserted into a human body.

It is another object of the present invention to provide an applicator capable of measuring doses which can improve measurement accuracy by measuring doses at a plurality of points.

According to an aspect of the present invention, there is provided an applicator capable of measuring a dose, comprising: a body unit having a hollow tubular shape; a radiation unit installed inside the body unit to irradiate radiation; And a plurality of measurement units provided in multiple layers, the measurement unit comprising: a measurement unit for measuring the dose of radiation emitted from the radiation unit at a plurality of points; and a fixed unit for fixing the measurement unit to the body unit, Is equipped with a scintillation counter to enable dose measurement.

According to one aspect of the present invention, the body unit may have a cylindrical tubular shape so as to be inserted into the inside of the human body, and may be provided in a linear shape extending in a linear direction along the longitudinal direction or in a bent shape bent at least once along the longitudinal direction.

According to one aspect, the radiation unit may be inserted longitudinally along the central axis of the body unit.

According to one aspect of the present invention, the measurement unit comprises a scintillation counter, and a scintillation support including a scintillating support formed of a fiber material supporting the scintillation counter unit and extending in the longitudinal direction so as to be longitudinally arranged with respect to the body unit. May be possible.

According to one aspect, the fixing unit includes a plurality of fixing portions for fixing the measurement unit to the outer peripheral surface of the body unit, and the plurality of fixing portions are stacked with the measurement unit interposed therebetween, The posture can be fixed.

According to one aspect of the present invention, the measurement unit may include a plurality of first measurement units arranged in a plurality of rows in parallel with each other with a different length along the outer surface of the body unit, and a plurality of first measurement units stacked on the first measurement unit, And a plurality of second measuring units arranged in rows and columns in a threaded manner.

According to one aspect of the present invention, the fixing unit includes a first fixing part fixing the first measuring part to the body unit, and a second fixing part fixing the second measuring part to the outer peripheral surface of the first fixing part And the first and second fixing portions may have a hollow tube shape closely contacting the body unit with the first and second measurement portions interposed therebetween.

According to one aspect, the body unit and the fixing unit may be formed of at least one material selected from acrylic and polycarbonate materials.

According to another aspect of the present invention, there is provided an applicator capable of measuring a dose, comprising: an applicator unit inserted into a human body and capable of performing radiation treatment; a measurement unit provided along an outer surface of the applicator unit for measuring a dose irradiated from the applicator unit; And a fixing unit for fixing the measuring unit to the applicator unit, wherein the measuring unit includes a plurality of measuring units each provided with a scintillation counter and provided in a multi-row and multi-layer.

According to one aspect, the applicator unit may include a body portion having a cylindrical tubular shape, and a radiation portion inserted into the body portion.

According to one aspect of the present invention, the body may be formed of at least one material selected from the group consisting of a straight line extending along the longitudinal direction, a straight line extending along the longitudinal direction, or a bending shape bent at least once along the longitudinal direction, and made of acrylic or polycarbonate.

According to an aspect of the present invention, the measurement unit may include a plurality of first measurement units arranged in a plurality of rows in parallel with each other with a different length along the outer circumferential surface of the applicator unit, and a plurality of first measurement units stacked on the first measurement unit, And a plurality of second measurement units arranged in rows and columns in a threaded manner.

According to one aspect, the fixing unit includes a first fixing part for fixing the first measuring part to the outer circumferential surface of the applicator unit, and a second fixing part for fixing the second measuring part to the outer peripheral surface of the first fixing part As shown in FIG.

According to one aspect, the first and second fixing portions have a hollow tube shape, and may be formed of at least one of acrylic and polycarbonate materials.

According to the present invention having the above-described configuration, first, a measurement unit including a scintillation counter provided in a body unit insertable into a human body measures the radiation dose irradiated from the radiation unit, so that the radiation dose It is possible to measure accurately.

Second, since the measurement units are arranged in multiple layers and in multiple rows, the radiation dose to be irradiated on the lesion can be measured simultaneously at a plurality of points, which is advantageous for improving the treatment reliability by accurate dose measurement.

Third, it becomes possible to measure the radiation dose using an applicator for irradiating the inside of the patient, and it is possible to measure the radiation dose while performing the conventional close-up radiation treatment without additional equipment, thereby contributing to improvement of the treatment quality.

1 is a plan view schematically showing an applicator capable of measuring a dose according to a preferred embodiment of the present invention.
FIG. 2 is an exploded view schematically illustrating an applicator capable of measuring a dose according to the embodiment shown in FIG.
3 is a cross-sectional view schematically illustrating an applicator capable of measuring a dose according to the embodiment shown in FIG.
4 is a cross-sectional view schematically taken along the line IV-IV shown in FIG.
5 is a cross-sectional view schematically taken along the line V-V shown in FIG.
FIG. 6 is an exploded view schematically showing the region VI shown in FIG. 1. FIG.
7 is a plan view schematically showing an applicator capable of measuring a dose according to another preferred embodiment of the present invention.
FIG. 8 is an exploded view schematically illustrating an applicator capable of measuring a dose according to another embodiment shown in FIG. And,
FIG. 9 is a cross-sectional view schematically showing an applicator capable of measuring a dose according to another embodiment shown in FIG.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 and 2, an applicator 1 capable of measuring a dose according to a preferred embodiment of the present invention includes a body unit 10, a radiation unit 20, a measurement unit 30, and a fixed unit 40, .

For reference, the applicator 1 capable of measuring a dose as described in the present invention is a device for measuring a dose of a near-infrared radiation used for measuring a radiation dose for managing the degree of brachytherapy radiation treatment.

The body unit 10 has a hollow tube shape extending in the longitudinal direction and can be directly inserted into the affected part of the human body if necessary. The body unit 10 has a curved outer circumferential surface to be inserted into the inside of the human body and is flexibly provided so as to be bent at least once in the longitudinal direction. The body unit 10 is a kind of applicator body having a cylindrical tubular shape applicable to proximal radiotherapy inserted into a human body and irradiating radiation.

In the present embodiment, it is exemplified that the body unit 10 is provided in a bent form in which the body unit 10 is bent once in the longitudinal direction. Also, the body unit 10 is formed of polycarbonate and acrylic materials. Due to such material properties, when the body unit 10 is inserted into a human body, it is excellent in flexibility, insulation, digestibility, acid resistance, impact resistance and transparency.

For the sake of convenience of explanation, in the embodiment, the tip end will be referred to as a first body part 11 with reference to the insertion direction D of the body unit 10, and the first body part 11 And the bent rear end is divided into the second body part 12 and explained.

First and second fixed caps 13 and 14 are provided at both ends of the body unit 10. The first fixing cap 13 has a hemispherical shape and is coupled to the front end of the first body part 11 on the basis of the insertion direction D in which the first fixing cap 13 is inserted into the human body. And is coupled to the rear end of the body portion 12. Due to the first and second fixing caps 13 and 14, the inside of the body unit 10 is sealed.

More specifically, the first fixing cap 13 closes the radiation unit 20 to be described later so as not to be detached in the inserting direction D of the body unit 10. At this time, the first fixing cap 13 has a hemispherical shape to guide the body unit 10 smoothly into the body without friction.

The second fixing cap 14 is coupled to the second body portion 12 of the body unit 10 to press the radiation unit 20 provided in the body unit 10 in the insertion direction D, At the same time, it is sealed to prevent leakage to the outside. To this end, the second fixing cap 14 is provided with a pressing protrusion 15 protruding in the insertion direction D, so that the radiation unit 20 can be pressed in the insertion direction.

The radiation unit (20) is installed inside the body unit (10) and irradiates the radiation. The radiation unit 20 is provided inside the body unit 10 so as to be parallel to the longitudinal direction of the body unit 10, that is, the insertion direction D in which the body unit 10 is inserted into the human body, . At this time, the radiation unit 20 is inserted along the central axis of the body unit 10 and is sealed inside the body unit 10 by the first and second fixing caps 13 and 14.

The measurement unit 30 includes a plurality of measurement units 31 and 34 provided in multiple rows and multiple layers in the longitudinal direction with respect to the body unit 10 to measure the dose of radiation irradiated from the radiation unit 20 .

In the present embodiment, it is exemplified that the measurement unit 30 is provided in a two-layer structure. Hereinafter, for convenience of explanation, the measuring unit located on the first layer is referred to as a first measuring unit 31, and the measuring unit stacked on the second layer stacked on the first layer is referred to as a second measuring unit 34 .

The first and second measuring units 34 respectively support first and second scintillation counters 32 and 35 and first and second scintillation counters 32 and 35, And first and second strobe supports 33 and 36 extending in the longitudinal direction so as to be installed in the longitudinal direction with respect to the unit 10. Here, the first and second scintillator scales 33 and 36 are formed of flexible optical fibers.

For reference, the measurement unit 30 is not shown in detail but may be electrically connected to external control means (not shown). Therefore, the radiation dose measured through the measurement unit 30 is transmitted to the control unit (not shown) in real time, so that the real-time radiation dose can be confirmed.

Meanwhile, the first and second measurement units 31 and 34 have a plurality of mutually parallel lengths. 2, the first scintillation counter 32 of the first measurement unit 31 is located on the first body 11 side and the second scintillation counter 35 of the second measurement unit 34 Is located on the second body portion 12 side. The configuration of the present invention including the first and second measurement portions 31 and 34 will be described later in detail with the configuration of the fixed unit 40. [

The fixed unit 40 fixes the measurement unit 30 to the body unit 10. The fixing unit 40 includes a plurality of fixing portions 41 and 42 which are brought into close contact with the body unit 10 with the measurement unit 30 interposed therebetween. In this embodiment, as the measurement unit 30 has a two-layer structure including the first and second measurement units 31 and 34, the fixed unit 40 also has the first and second measurement units 31 and 34, (41) and (42) corresponding to the first and second fixing portions (31) and (34). The number of the measuring portions 31 and 34 and the fixing portions 41 and 42 is not limited to the illustrated example.

The first fixing part 41 adheres the first measuring part 31 to the outer peripheral surface of the body unit 10. The first fixing part 41 has a shape and a length to cover the first and second body parts 11 and 12 of the body unit 10 so that the first scintillation counter 32 The first measuring unit 31 located on the first body part 11 is fixed to the body unit 10 in a posture.

The second fixing part (42) fixes the second measuring part (34) to the body unit (10) to fix the second measuring part (34). The second fixing part 42 fixes the second measuring part 34 laminated on the first fixing part 41 to the body unit 10 side. More specifically, the second scintillation counter 35 of the second measuring unit 34 is provided on the second body 12 side, and the second scintillation scaffold 36 extends to the outside of the body unit 10, The second measuring portion 34 is stacked on the first fixing portion 41. The second measuring portion 34 stacked on the first fixing portion 41 is fixed to the second body portion 12 by the second fixing portion 42.

3, the first measuring unit 31 is attached to the outer circumferential surface of the first and second body portions 11 and 12 by a first fixing unit 41 And the second measuring portion 34 is fixed to the outer circumferential surface of the first fixing portion 41 so as to face the second body portion 12 and fixed thereto by the second fixing portion 42. [

The first and second fixing parts 41 and 42 have a cylindrical tube shape corresponding to the shape of the body unit 10 having a cylindrical tube shape. At this time, the first fixing part 41 has a tubular shape bent in correspondence with the shape of the first and second body parts 11 and 12 which are bent and extended to each other. The first and second fixing portions 41 and 42 may be formed of at least one of polycarbonate and acrylic materials so that they do not interfere with the radiation irradiation and the dose measurement.

4 and 5, the first and second measuring portions 31 and 34 are fixed to the body unit 10 by the first and second fixing portions 41 and 42, Are arranged in multiple rows so as to be spaced apart from each other in the circumferential direction of the body unit (10). 4, a plurality of the first measuring units 31 are spaced apart from each other along the outer circumferential surface of the body unit 10, and are fixed by the first fixing unit 41. 5, the second measuring units 34 are provided to be spaced apart from each other along the outer circumferential surface of the first fixing unit 41 so as to be stacked on the first measuring unit 31, As shown in Fig.

At this time, as shown in FIG. 6, the first and second measurement units 31 and 34 are provided in a plurality of different lengths. Specifically, the first measuring unit 31 is arranged to be parallel to the outer circumferential surface of the first body unit 11 so as to have a gradually shorter length from the front end to the rear end of the first body unit 11. [ More specifically, the first measuring units 31 are arranged such that the first scintillation counter 32 of the first measuring unit 31 is gradually spaced apart from the tip of the first body 11 in a threaded manner, . Accordingly, the length of the plurality of first measurement units 31 overlapping the body unit 10 along the circumferential direction of the body unit 10 is gradually reduced.

The plurality of second measuring portions 34 are arranged in parallel with each other so that the second scintillation coefficient 35 of the second measuring portion 34 gradually becomes spaced apart from the tip of the second body portion 12 in a threaded manner. . The second measuring unit 34 is also disposed such that the length of the second measuring unit 34 overlapping with the second body 12 of the body unit 10 gradually decreases along the circumferential direction.

4 and 5, the diameter or thickness of the radiation unit 20 provided on the central axis of the body unit 10 is approximately 2 mm, and the diameter of the first body part 11 is approximately 8 mm. The diameter of the first and second measuring portions 31 and 34 stacked on the outer peripheral surfaces of the first and second body portions 11 and 12 is 2 mm and the first and second measuring portions 31 and 31 The thickness of each of the first and second fixing portions 41 and 42 which are sequentially stacked on the outer peripheral surface of the first and second fixing portions 34 and 34 is 2 mm. Therefore, it is exemplified that the total diameter of the applicator 1 capable of measuring doses described in the present invention is approximately 16 mm.

Each of the first and second scintillation counters 32 and 35 of the first and second measuring units 31 and 34 has a length of 2 mm and has mutually adjacent measuring units 31 and 34 ) With a length difference of 4 mm. However, it is needless to say that the thickness, length and number of the measuring unit 30 having such a configuration are not limited to the illustrated examples.

In order to solve the problem of inserting the human body due to the second securing part 42 which protrudes relative to the outer circumferential surface of the first securing part 41 to form a step, A guider 43 may be provided. The guider 43 guides the applicator 1 so that the applicator 1 can be smoothly inserted into the inside of the human body by connecting the second fixing portion 42 so as to be inclined with respect to the first fixing portion 41.

According to the applicator 1 capable of measuring the dose according to the present invention having the above-described configuration, the body unit 10 is inserted into the inside of the human body while supporting the radiation unit 20 and the measurement unit 30. At this time, the first and second measurement units 31 and 34 of the multi-layer structure are arranged so that the measurement unit 30 is in close contact with the outer peripheral surfaces of the first and second body portions 11 and 12 of the body unit 10, And a plurality of the first and second measuring portions 31 and 34 are arranged in multiple rows so as to be spaced apart from each other in a screw shape.

Thereby, the measurement unit (30) can measure the amount of radiation irradiated from the radiation unit (20) disposed on the central axis of the body unit (10) at a plurality of points. Therefore, it is possible to accurately measure the dose at a plurality of points at the same time as the applicator 1 irradiates the radiation, thereby contributing to the improvement of the radiation therapy prediction accuracy.

Referring to Fig. 7, an applicator 100 according to another embodiment of the present invention is shown. The applicator 100 according to another embodiment shown in FIG. 7 includes a body unit 110, a radiation unit 120, a measurement unit 130, and a fixed unit 140 as in the embodiment. Here, since the configuration of the radiation unit 120 is the same as that of the above-described embodiment, detailed description will be omitted.

The body unit 110 has a hollow tube shape having a straight and non-bent shape. At this time, the body unit 110 includes a first body part 111 in the insertion direction D and a second body part 112 coupled to the rear side of the first body part 111.

The first and second body parts 111 and 112 are coupled to each other in a straight line direction. A first fixing cap 113 is coupled to the tip of the first body part 111, and a second body part 112, The second fixing cap 114 is coupled to the rear end of the second fixing cap 114. [ The radiation unit 120 inserted on the center axis of the first and second body parts 111 and 112 by the first and second fixing caps 113 and 114 is not separated from the body unit 110, As shown in Fig. In addition, the first and second body parts 111 and 112 are detachably coupled to each other, so that the radiation unit 120 inserted therein can be easily separated and replaced. The second fixing cap 114 may be provided with a pressing protrusion 115 to press the radiation unit 120 in the insertion direction D. [

The measurement unit 130 includes a plurality of measurement units 131 and 134 arranged in a multi-layered and multi-row arrangement, and measures the radiation dose at a plurality of points. In this case, the plurality of measurement units 131 have a two-layer structure as in the embodiment. For convenience of explanation, the plurality of measurement units 131 include a first measurement unit 131 stacked on the body unit 110, And a second measurement unit 134 stacked on the first measurement unit 131.

8, the first and second measurement units 131 and 134 include first and second scintillation counter units 132 and 135, first and second scintillation counter units 132 and 135, The first and second strobe supports 134 and 136 that support the first and second strobe supports 134 and 136, respectively. The first and second measuring units 131 and 134 may have different lengths to be spaced apart from each other in the circumferential direction of the body unit 110, have.

The fixing unit 140 includes first and second fixing parts 141 and 142 for fixing the first and second measuring parts 131 and 134 to the body unit 110. [ 8 and 9, the first fixing part 141 is disposed on the outer surface of the first body part 111 of the body unit 110 along the outer circumferential surface of the first body part 111, Tightly. The second fixing part 142 closely fixes the second measuring part 134 along the outer circumferential surface of the first fixing part 141.

The configuration in which the first and second measurement units 131 and 134 are fixed in the multi-layer and multi-row configurations by the first and second fixing units 141 and 142 includes the above- similar. That is, in the applicator 100 according to another embodiment, the measuring unit 130 is arranged in a multi-layered and multi-row manner with respect to the body unit 110 provided in a straight line and fixed in position by the fixed unit 140, .

As described above, the measuring units 30 and 130 of the applicator 100 capable of measuring doses according to the preferred embodiment and the other embodiments of the present invention are installed in the scintillation counters 32, 35 and 132 135, but is not limited thereto. For example, although the measurement units 30 and 130 are not shown in detail, it is possible to measure a radiation dose such as a MOSFET (Metal Oxide Field Effect Transistor) dosimeter, an OSLD (Optically Stimulated Luminescence Dosimeter) dosimeter, a TLD (Thermoluminescence Dosimeter) It is of course possible to employ any of the various dosimeters available.

Although the present invention has been described with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the following claims. It can be understood that

1, 100: Applicators capable of measuring doses
10, 110: body unit 11, 111: first body part
12, 112: second body part 20, 120: radiation unit
30, 130: measurement unit 31, 131: first measurement unit
34, 134: second measuring unit 40, 140: fixed unit
41, 141: first fixing part 42, 142: second fixing part

Claims (14)

A body unit having a hollow tubular shape;
A radiation unit installed inside the body unit to irradiate radiation;
A measuring unit including a plurality of measurement units provided in multiple rows and multiple layers in the longitudinal direction with respect to the body unit, the measurement unit measuring the radiation dose irradiated from the radiation unit at a plurality of points; And
A fixing unit for fixing the measurement unit to the body unit;
/ RTI >
Wherein the plurality of measurement units are provided with a scintillation counter,
A first fixed cap having a hemispherical shape provided in an insertion direction in which the body unit is inserted into a human body;
A second fixed cap coupled to a rear end of the body unit, the second fixed cap further including a pressing projection in an insertion direction to be inserted into a human body so as to press the radiation unit in an insertion direction;
The applicator being capable of measuring doses. The method according to claim 1,
Wherein the body unit has a cylindrical tubular shape so as to be inserted into a human body and is provided in a linear shape extending in a linear direction along the longitudinal direction or a bent shape bent at least once along the longitudinal direction. The method according to claim 1,
Wherein the radiation unit is longitudinally inserted along a central axis of the body unit. The method according to claim 1,
Wherein the measuring unit comprises the scintillation counter and a scintillating scaffold formed of a flexible fiber material that supports the scintillation counter and extends longitudinally so as to be longitudinally disposed with respect to the body unit. The method according to claim 1,
The fixing unit includes a plurality of fixing portions for fixing the measuring unit to the outer peripheral surface of the body unit,
Wherein the plurality of fixtures are stacked with the measurement unit interposed therebetween to allow the measurement unit to be attained in multiple layers. The method according to claim 1,
Wherein the measuring unit comprises:
A plurality of first measurement units arranged in a plurality of rows and arranged in parallel with each other with a different length along the outer surface of the body unit; And
A plurality of second measurement units stacked on the first measurement unit and arranged in multiple rows in a threaded manner with different lengths;
The applicator being capable of measuring the dose. The method according to claim 6,
The fixed unit includes:
A first fixing unit fixing the first measuring unit to the body unit; And
A second fixing part laminated on the first fixing part to fix the second measuring part to the outer peripheral surface of the first fixing part;
/ RTI >
Wherein the first and second fixing portions have a hollow tube shape that is in close contact with the body unit with the first and second measurement portions interposed therebetween. The method according to claim 1,
Wherein the body unit and the fixing unit are formed of at least one material selected from acrylic and polycarbonate materials. An applicator unit inserted into a human body and capable of radiotherapy;
A measurement unit provided along an outer surface of the applicator unit for measuring a dose irradiated from the applicator unit; And
A fixing unit for fixing the measurement unit to the applicator unit;
/ RTI >
Wherein the measuring unit includes a plurality of measurement units each having a scintillation counter and provided in multiple and multi-layers,
Wherein the applicator unit includes a body portion having a cylindrical tubular shape and a radiation portion inserted into the body portion,
A first fixed cap having a hemispherical shape provided in an inserting direction in which the body portion is inserted into a human body;
A second fixing cap coupled to a rear end of the body portion and further including a pressing protrusion in a direction of insertion into the inside of the human body so as to press the radiation portion in an insertion direction;
The applicator being capable of measuring doses. delete 10. The method of claim 9,
Wherein the body portion is formed of at least one material selected from the group consisting of acrylic and polycarbonate materials, the body portion being linearly extended in the linear direction along the longitudinal direction or bent at least once along the longitudinal direction. 10. The method of claim 9,
Wherein the measuring unit comprises:
A plurality of first measurement units arranged in rows and columns and having a plurality of different lengths along an outer circumferential surface of the applicator unit; And
A plurality of second measurement units stacked on the first measurement unit and arranged in multiple rows in a threaded manner with different lengths;
The applicator being capable of measuring the dose. 13. The method of claim 12,
The fixed unit includes:
A first fixing unit for fixing the first measuring unit to the outer circumferential surface of the applicator unit; And
A second fixing part laminated on the first fixing part to fix the second measuring part to the outer peripheral surface of the first fixing part;
The applicator being capable of measuring the dose. 14. The method of claim 13,
Wherein the first and second fixing portions have a hollow tube shape and are formed of at least one material selected from acrylic and polycarbonate materials.

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