KR101794421B1

KR101794421B1 - Monitoring apparatus for measuring dose of brachytherapy radiation

Info

Publication number: KR101794421B1
Application number: KR1020150183981A
Authority: KR
Inventors: 김동욱; 정원규; 윤명근; 문선영; 정미주; 임영경
Original assignee: 경희대학교 산학협력단
Priority date: 2015-12-22
Filing date: 2015-12-22
Publication date: 2017-11-08
Also published as: KR20170074559A

Abstract

The apparatus for inspecting a near-field radiation dose according to the present invention includes a dose unit including at least one dose plate provided with a dose meter for measuring a dose of radiation, and at least one photosensitive plate provided with a photoconductor for measuring a dose of radiation dose And a phantom unit into which a radiation source for inserting the radiation dose unit and the photosensitive unit is inserted. According to this configuration, the radiation dose can be inspected from the outside or remotely, thereby contributing to the improvement of the high-precision dose evaluation quality.

Description

TECHNICAL FIELD [0001] The present invention relates to a monitoring apparatus,

The present invention relates to an apparatus for inspecting a near-field radiation dose, and more particularly, to an apparatus for inspecting a near-field radiation dose capable of independent external examination of a near-dose radiation dose.

External radiation therapy and proximal radiation therapy are common methods of radiation therapy for cancer patients. Here, the external radiation therapy is a treatment for removing cancer cells by irradiating the patient with radiation from the outside of the patient using a radiation generator, and the proximity radiotherapy is a method of inserting a radiation isotope into a body part of the patient, It is a treatment to remove cancer cells.

On the other hand, the close-up radiation therapy has an advantage of being excellent in clinical efficacy by directly irradiating a treatment site with radiation, but has a problem due to unnecessary radiation exposure when radiation is irradiated to a neighboring site rather than a lesion. Accordingly, the near-field radiation treatment requires dose measurement for dose control together with accurate irradiation of the positional radiation.

However, dose measurement for general proximal radiotherapy is relatively weak compared to conventional linear accelerator based radiotherapy. Therefore, in recent years, a variety of researches on independent external audits have been conducted to ensure accurate and safe radiation therapy.

-. Korean Patent No. 10-0613244 (Registered Date: August 09, 2006)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device for inspecting a near-radiation dose which can independently perform external inspection of a near-dose dose.

In order to achieve the above object, a near-field radiation dose checking apparatus includes a dose unit including at least one dose plate provided with a dose meter for measuring a dose of radiation, and at least one photosensitive plate provided with a photoconductor for measuring a dose of radiation dose And a phantom unit into which the dose unit and the photosensitive unit are inserted and supported and into which a radiation source for irradiating the radiation can be inserted.

According to one aspect, the dosimeter includes at least one of a glass dosimeter, an OSLD (Optically Stimulated Luminescence Dosimeter) dosimeter, and a TLD (Thermoluminescence Dosimeter) dosimeter, and the photoconductor includes a photosensitive film.

According to one aspect, the phantom unit is formed of a PMMA material, and a scale is provided on an outer surface of the phantom unit for measuring a depth of the radiation source inserted in the longitudinal direction.

According to one aspect, the dosimeter includes a glass dosimeter, and the at least one dose plate is disposed in a pair so that the glass dosimeters cross each other.

According to one aspect, the at least one photosensitive plate is disposed in a pair so as to face each other.

According to one aspect of the present invention, the phantom unit has a hollow rectangular parallelepiped shape having an empty space therein, and includes a support portion inserted into the space while closely supporting the dose and the photosensitive plate.

According to one aspect of the present invention, the support portion includes: a support body inserted into the space and into which the radiation source is inserted; first and second dose installation grooves provided to face the support body to install the dose plate; And the first and second photosensitive mounting grooves provided on the supporting body so as to face the surfaces on which the second dose mounting grooves are not formed and on which the photosensitive plate is installed, and the end portions of the dose plate and the photosensitive plate, A fixing body made of an elastic material for fixing the mounting position and posture of the first and second dose mounting grooves and the first and second photosensitive mounting grooves is provided.

According to one aspect of the present invention, the photosensitive plate includes a guider hole inserted in a guide protruding from the support body, thereby guiding the installation position of the photosensitive member.

According to an aspect of the present invention, a plurality of phantom units may be provided, and the phantom unit may include a plurality of phantom mounting units, each of which includes a plurality of phantom units, .

According to one aspect of the present invention, the phantom mounting unit includes a plurality of partition walls that are internally provided so as to cross each other, and the installation spaces are arranged in parallel and in multiple rows mutually.

According to a preferred embodiment of the present invention, there is provided a radiation dose measuring apparatus, comprising: a dose unit including a plurality of dose plates each of which is provided with a different number of dosimeters for measuring a dose of radiation; a pair of And a phantom unit which supports at least any one of at least one of the plurality of dose plates and the pair of photosensitive plates and into which a radiation source for irradiating radiation can be inserted .

According to one aspect, the dosimeter includes a glass dosimeter, wherein some of the plurality of dose plates are inserted in parallel to one another in the longitudinal direction and the remaining portions are inserted side by side in the width direction, Are installed in the phantom unit such that the glass dosimeters cross each other.

According to one aspect of the present invention, the phantom unit has a hollow rectangular parallelepiped shape having an empty space therein. The phantom unit is inserted into the space in a state of supporting at least any one of the plurality of dose plates and the pair of photosensitive plates, .

According to one aspect of the present invention, the support portion includes a support body inserted into the space and to which the radiation source is inserted, first and second dose installation grooves provided on the support body so as to face each other, And first and second photosensitive mounting grooves provided on the support body so as to face each other on a surface on which the first and second dose mounting grooves are not provided, the first and second photosensitive mounting grooves being provided with the pair of photosensitive plates, And a fixing member made of an elastic material for fixing the mounting position and the attitude for the first and second dose mounting grooves and the first and second photosensitive mounting grooves are provided at the ends of the dose plate and the pair of photosensitive plates, do.

According to one aspect, the pair of photosensitive plates includes a guider hole inserted in a guider protruding from the support body, so that the installation position of the photoconductor is guided.

According to the present invention having the above-described configuration, first, since the examination of the proximity radiation dose corresponding to the near-field radiation therapy apparatus can be independently performed, it is possible to establish the criteria of the dose evaluation applicable to the actual treatment of the patient .

Second, as the radiation dosimetry that can be applied to external patient treatment becomes possible, it is possible to contribute to the improvement of the quality of treatment by improving the quality of high-precision dose verification.

Thirdly, since a plurality of phantom units can be simultaneously installed in the phantom installation unit to perform a close-up radiation dose inspection, it is possible to contribute to improvement of inspection accuracy and efficiency improvement.

1 is a perspective view schematically showing an apparatus for inspecting a near-field radiation dose according to a preferred embodiment of the present invention,
FIG. 2 is a plan view and a side view schematically showing the apparatus for inspecting a near-field radiation dose shown in FIG. 1. FIG.
FIG. 3 schematically shows dose plates of the dose unit shown in FIG. 1,
FIG. 4 is a schematic view of photosensitive plates of the photosensitive unit shown in FIG. 1,
5 is a plan view schematically showing a modified example to which the OSLD dosimeter is applied,
FIG. 6 is a plan view schematically showing a modified example to which the TLD dosimeter is applied,
FIG. 7 is a plan view and a side view schematically showing a device for inspecting a near-field radiation dose according to another embodiment of the present invention,
FIG. 8 is a schematic plan view and a side view of a phantom unit of the apparatus for testing a near-field radiation dose shown in FIG.

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

1 and 2, an apparatus 1 for inspecting a near-field radiation dose includes a radiation dose unit 10, a photosensitive unit 20 and a phantom unit 30 according to a preferred embodiment of the present invention.

For reference, the apparatus 1 for inspecting a near-field radiation dose described in the present invention is a device for measuring a radiation dose and distribution for an external audit of a brachytherapy radiation treatment.

The dose unit 10 includes at least one dose plate 11-16 provided with a dosimeter D1 for measuring a dose of radiation. In this embodiment, as shown in Fig. 3, the dosimeter D1 is shown and exemplified as including a glass dosimeter formed of silver or cobalt glass. This glass dosimeter D1 has a substantially cylindrical shape.

Meanwhile, the dose unit 10 includes six dose plates 11 to 16 and is illustrated and illustrated. Hereinafter, six dose plates 11 to 16 will be referred to as first to sixth dose plates 11, 12, 13, 14, 15 and 16, respectively.

Referring to FIG. 3, the first to third dose plates 11, 12, and 13 are provided so that three, two, and one glass dosimeters D1 are inserted in parallel to each other in the longitudinal direction. In addition, the fourth to sixth dose plates 14, 15 and 16 are provided such that three, two, and one glass dosimeters D1 are inserted in the width direction crossing the longitudinal direction. At this time, the first and fourth dose plates 11 and 14, in which the three glass dosimeters D1 are inserted, are provided with glass dosimeters D1 spaced apart from one another at equal intervals.

The first through third dose plates 11,12 and 13 and the fourth through sixth dose plates 14,15 and 16 face each other by a phantom unit 30 to be described later. For example, as shown in Fig. 2, the first dose plate 11 and the fourth dose plate 14, which are provided with three glass dosimeters D1, face each other. Therefore, the glass dosimeters D1 face each other in mutually intersecting directions. By thus facing the plurality of dose plates 11, 12, 13, 14, 15, 16 mutually, the dose measurement accuracy of the glass dosimeter D1 having a cylindrical shape extending in the longitudinal direction .

Here, the first to sixth dose plates 11, 12, 13, 14, 15, 16 are not limited to facing the dose plates having the same number of the glass dosimeters D1, It is possible to face the dose plate having a different number of the glass dosimeters D1 or to face the auxiliary dose plate 17 (see Fig. 3) in which the glass dosimeter D1 is not provided. That is, at least one of the plurality of dose plates 11, 12, 13, 14, 15 and 16 of the dose unit 10 is used to measure the dose of radiation. Although not shown in detail, a dummy (not shown) having the same shape as that of the glass dosimeter D1 is used in place of the dosimetry plate D1, the dose plates 11, 12, 13, 14, 15, ) To modify the dose measurement conditions.

The photosensitive unit 20 includes at least one photosensitive plate 21 (22) provided with a photosensitive member (F) for radiation dose distribution measurement. The at least one photosensitive plate 21 (22) is arranged in a pair so as to face each other as shown in Fig. Hereinafter, for convenience of explanation, the pair of photosensitive plates 21 and 22 will be referred to as first and second photosensitive plates 21 and 22 as shown in FIG.

As shown in FIG. 4, the first and second photosensitive plates 21 and 22 are each provided with a photosensitive film as a photoreceptor (F). Specifically, the first and second photosensitive plates 21 and 22 are provided with first and second mounting grooves 21a and 22a, respectively, which are inserted into the first and second photosensitive plates 21 and 22, Respectively. It is also possible to provide a modification in which the photoreceptor F is provided on one surface and the other surface, that is, both surfaces, of the first and second photosensitive plates 21 and 22, respectively.

The first and second photosensitive plates 21 and 22 are formed in a plate shape having the same length as the first to sixth dose plates 11, 12, 13, 14, 15 and 16 But the width is longer than the first to sixth dose plates 11, 12, 13, 14, 15, 16 in order to secure a sufficient photosensitive area.

For reference, in the present embodiment, the first to sixth dose plates 11, 12, 13, 14, 15 and 16 are illustrated as having a length of 120 mm, a width of 18 mm and a thickness of 5 mm, The first and second photosensitive plates 21 and 22 are shown and illustrated as having a length of 120 mm, a width of 25 mm and a thickness of 5 mm. 12, 13, 14, 15, 16 and the first and second photosensitive plates 21, 21, 22, 23, and 24, depending on the dose inspection conditions, ) 22 is variable in length, width and thickness.

The first to sixth dose plates 11, 12, 13, 14, 15 and 16 and the first and second photosensitive plates 21 and 22 are preferably made of an acrylic material .

In the phantom unit 30, a dose unit 10 and a photosensitive unit 20 are inserted, and a radiation source 31 for measuring a dose and a distribution of radiation is inserted. Here, although the radiation source 31 is not shown in detail, it may be inserted into a metal tube (not shown).

The phantom unit 30 has a hollow rectangular parallelepiped shape having an insertion hole 32 into which the dose unit 10 and the photosensitive unit 20 are inserted and a space 33 extending from the insertion hole 32 I have. At this time, the phantom unit 30 has a length of 120 mm corresponding to the lengths of the dose plates 11, 12, 13, 14, 15 and 16 and the photosensitive plates 21 and 22, And an outer shape of a rectangular parallelepiped having a length of 55 x 55 mm. In addition, the width and length of the space 33 of the phantom unit 30 are shown and emptied with a size of 35 x 35 mm. The phantom unit 30 has a small size so that the phantom unit 30 can be easily carried and can be easily transported over a long distance.

For reference, the phantom unit 30 is formed of a material similar to a phantom equivalent phantom used for actual near-field radiation therapy, and is formed of PMMA material in the present embodiment. In addition, a scale 34 is provided on the outer surface of the phantom unit 30 to measure the depth of the radiation source 31 inserted in the longitudinal direction. At this time, before the radiation source 31 is inserted into the phantom unit 30, a substitute for the radiation source 31, such as wire, is inserted into the phantom unit 30 so that the depth at which the radiation source 31 can be inserted It is preferable to contribute to prevention of breakage of the radiation source 31 and improvement of inspection quality.

The phantom unit 30 is inserted into the space 33 while supporting the dose unit 10 and the photosensitive unit 20 and is provided with a source insertion port 40a into which a radiation source 31 is inserted And a support portion 40.

The support portion 40 is inserted into the phantom unit 30 while supporting the dose unit 10 and the photosensitive unit 20. The support portion 40 includes a support body 41, a first dose installation groove 42, a second dose installation groove 43, a first photosensitive installation groove 44 and a second photosensitive installation groove 45, .

The support body 41 is preferably made of the same material as the phantom unit 30 and is inserted into the insertion hole 32 with a size corresponding to the insertion hole 32 of the phantom unit 30. That is, the support body 41 has a rectangular parallelepiped shape having a length and a length of 35 mm and a length of 120 mm, is inserted into the insertion hole 32, and is closely attached to the inside of the phantom unit 30.

The first and second dose installation grooves 42 and 43 are provided on the support body 41 facing each other. 2, the first to fourth surfaces 41a, 41b, 41c, and 41d that are mutually connected in the clockwise direction to closely contact the inner surface of the insertion hole 32 of the phantom unit 30 The first and second dose installation grooves 42 and 43 are provided in a stepped manner on the first and third surfaces 41a and 41c facing each other at this time. At this time, the first and second dose installation grooves 42 and 43 have dimensions corresponding to the first to sixth dose plates 11, 12, 13, 14, 15 and 16 .

The first and second photosensitive mounting grooves 44 and 45 are formed on the second and fourth surfaces 41b of the supporting body 41 in which the first and second dose mounting grooves 42 and 43 are not provided 41d so as to face each other. The first and second photosensitive mounting grooves 44 and 45 also have dimensions corresponding to the first and second photosensitive plates 21 and 22 so that the first and second photosensitive plates 21 and 22 ) Is prevented from flowing.

At least one of the dose plates 11, 12, 13, 14, 15 and 16 and the opposite ends of the photosensitive plates 21 and 22, A fixing body 46 for fixing the mounting position and the posture of the first and second dose mounting grooves 42 and 43 and the first and second photosensitive mounting grooves 44 and 45 is provided. Here, the fixing member 46 is formed of an elastic material.

4) is provided in the first and second photosensitive plates 21 and 22 so that the guider 47 protruding from the support body 41 is inserted into the first and second photosensitive plates 21 and 22, So that the photoreceptor F of the second photosensitive plates 21 and 22 can be positioned at an accurate position.

The inspection method of the apparatus 1 for inspecting the near-field radiation dose according to the present invention having the above-described structure will be described with reference to FIGS. 1 to 4. FIG.

1 and 2, the first and second dose installation grooves 42 and 43 and the first and second photosensitive installation grooves 44 and 45 provided in the support body 41 of the support portion 40, The first and fourth dose plates 11 and 14 and the first and second photosensitive plates 21 and 22 are inserted into the first and second dose plates 11 and 14, respectively. At this time, the glass dosimeters D1 of the first and fourth dose plates 11 and 14 face each other as shown in FIG.

3, the second and fifth dose plates 12 and 15 provided with two glass dosimeters D1, which are not the first and fourth dose plates 11 and 14, Or the third and sixth dose plates 13 and 16 are inserted into the support body 41, as shown in Fig. The auxiliary dose plate 17 in which the glass dosimeter D1 is not inserted and any one of the first to sixth dose plates 11, 12, 13, 14, 15, A modification is possible in which the support body 41 is inserted. It is also possible that only one of the first and second photosensitive plates 21 and 22 is supported by the support body 41. That is, the installation conditions of the dose plates 11, 12, 13, 14, 15, 16 and the photosensitive plates 21, 22 vary in various ways depending on the proximity radiation condition to be inspected.

Is inserted into the space 33 through the insertion hole 32 of the phantom unit 30 in a state where the dose unit 10 and the photosensitive unit 20 are inserted into the support portion 40. Thereafter, the radiation source 31 is inserted into the source insertion port 40a provided at the center of the support body 41 of the support portion 40, and the radiation is irradiated to measure the proximity radiation dose and distribution. Specifically, the time and position of the radiation source 31 staying in the affected area and the intensity of the radiation source 31 are inspected by the glass dosimeter D1 and the photoconductor F. FIG.

In this embodiment, the dosimeter D1 of the dose unit 10 includes a glass dosimeter, but the present invention is not limited thereto. For example, an OSLD (Optically Stimulated Luminescence Dosimeter) dosimeter D2 as shown in FIG. 5 or a TLD (Thermoluminescence Dosimeter) dosimeter D3 as shown in FIG. Here, the OSLD dosimeter D3 of FIG. 5 is a light-stimulating luminous dosimeter for measuring a radiation dose using a characteristic of emitting light in proportion to an irradiated dose. The TLD dosimeter D4 shown in FIG. 6 has a characteristic of a thermoluminescence dosimeter which is proportional to the amount of radiation absorbed by the amount of light generated by heating after the absorption of the fluorescent material, and is composed of calcium fluoride (CaF2), lithium fluoride (LiF) Calcium (CaSO4), oxidized berry room (BeO) and the like are used.

The OSLE dosimeter D2 has a width and a length of 10 mm and is spaced apart from each other at equal intervals. The TLD dosimeter D3 has a width of about 3.5 mm and a width of about 0.38 mm, And are spaced apart from one another.

Referring to FIG. 7, an apparatus 100 for testing a near-field radiation dose according to another embodiment of the present invention is schematically shown.

7, the apparatus for inspecting a near-field radiation dose 100 according to another embodiment includes a radiation dose unit 10, a photosensitive unit 20, a phantom unit 30, and a phantom mounting unit 150. As shown in FIG. Here, the configurations of the dose unit 10, the photosensitive unit 20, and the phantom unit 30 have the same configurations as those of the preferred embodiment of the present invention described with reference to FIGS. 1 to 4, Are omitted and denoted by the same reference numerals.

The apparatus for inspecting a near-field radiation dose 100 according to another embodiment includes a plurality of phantom units 30 in which a dose unit 10 and a photosensitive unit 20 are inserted and supported, respectively, and a plurality of phantom units 30, Are simultaneously installed by the phantom mounting unit 150 to perform inspection. 8, the phantom installation unit 150 has a plurality of installation spaces 152 partitioned into a plurality of phantom units 30 so that a plurality of phantom units 30 can be installed therein.

More specifically, the phantom mounting unit 150 includes a plurality of partition walls 151 that are internally installed to cross each other, so that the installation spaces 152 are divided into multiple rows and multiple rows. The plurality of installation spaces 152 have a size corresponding to the size of the phantom unit 30 in which the dose unit 10 and the photosensitive unit 20 are inserted and supported. 7 and 8 that the plurality of installation spaces 152 are provided in three rows and two columns, but it is not limited thereto.

In the case of the apparatus for inspecting a near-field radiation dose 100 according to another embodiment, it is possible to simultaneously examine a plurality of radiation sources 31 with a near-radiation dose. For example, three rows of phantom units 30 corresponding to three radiation source lines 31 commonly used in patient treatment are provided in multiple rows in which the dose unit 10 and the photosensitive unit 20 are inserted, respectively, . &Lt; / RTI >

In addition, it is possible to inspect not only the different radiation sources 31 at the same time, but also the near-radiation dose for the same radiation source 31. As a result, it is possible to contribute not only to shortening inspection time for a plurality of radiation sources 31 but also to improvement in inspection accuracy.

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: Close-up radiation dose detector 10:
11, 12, 13, 14, 15, 16: first to sixth dose plates
20: photosensitive unit 21, 22: first and second photosensitive plates
30: phantom unit 40: support
41: Support body 150: Phantom mounting unit
151: bulkhead 152: installation space
D1, D2, D3: Dosimeter

Claims

A dose unit comprising at least one dose plate on which a dosimeter for dosimetry of radiation is provided;
A photosensitive unit including at least one photosensitive plate on which a photosensitive member for measuring a radiation dose distribution is provided; And
A phantom unit into which the radiation dose unit and the photosensitive unit are inserted and supported and into which a radiation source for irradiating radiation can be inserted;
/ RTI >
Wherein the phantom unit has a hollow shape having a hollow space therein and includes a support portion which is inserted into the space while closely supporting the dose and the photosensitive plate.

The method according to claim 1,
Wherein the dosimeter comprises at least one of a glass dosimeter, an OSLD (Optically Stimulated Luminescence Dosimeter) dosimeter, and a TLD (Thermoluminescence Dosimeter)
Wherein the photoreceptor comprises a photosensitive film.

The method according to claim 1,
Wherein the phantom unit is made of a PMMA material and has a scale for measuring a depth of the radiation source inserted in the longitudinal direction on an outer surface thereof.

The method according to claim 1,
Wherein the dosimeter comprises a glass dosimeter,
Wherein the at least one dose plate is disposed in a pair so as to face each other, and the glass dosimeters are disposed in a direction crossing each other.

The method according to claim 1,
Wherein the at least one photosensitive plate is disposed in a pair so as to face each other.

The method according to claim 1,
Wherein the phantom unit has a hollow rectangular parallelepiped shape.

The method according to claim 1,
The support portion
A support body inserted into the space and into which the radiation source is inserted;
First and second dose mounting grooves provided on the support body so as to face each other and on which the dose plate is installed; And
First and second photosensitive mounting grooves provided on the support body so as to face the surfaces on which the first and second dose mounting grooves are not provided and in which the photosensitive plate is installed;
/ RTI >
The dose plate and the photosensitive plate are provided at their end portions in parallel with each other in the lengthwise direction. The first and second dose mounting grooves and the proximity of the first and second photosensitive mounting grooves, Radiation dosimetry device.

8. The method of claim 7,
Wherein the photosensitive plate has a guider hole inserted in a guider protruding from the support body to guide the installation position of the photoreceptor.

The method according to claim 6,
Wherein the plurality of phantom units are provided so that the dose unit and the photosensitive unit are respectively inserted and supported,
A phantom mounting unit having a plurality of installation spaces partitioned so that the plurality of phantom units are installed at the same time;
And a detector for detecting the radiation dose.

10. The method of claim 9,
The phantom mounting unit includes:
Wherein the plurality of partition walls are provided so as to cross each other, and the installation spaces are arranged in a mutually parallel fashion and in multiple rows.

A dose unit including a plurality of dose plates each of which is provided with a different number of dosimeters for measuring a radiation dose;
A photosensitive unit including a pair of photosensitive plates arranged to face each other with a photosensitive member for radiation dose distribution measurement; And
A phantom unit which supports at least any one of the plurality of dose plates and at least one of the pair of photosensitive plates and into which a radiation source for irradiating radiation can be inserted;
/ RTI >
Wherein the phantom unit has a hollow shape having a hollow space therein and includes a support portion which is inserted into the space while closely supporting the dose and the photosensitive plate.

12. The method of claim 11,
Wherein the dosimeter comprises at least one of a glass dosimeter, an OSLD (Optically Stimulated Luminescence Dosimeter) dosimeter, and a TLD (Thermoluminescence Dosimeter)
Wherein the photoreceptor comprises a photosensitive film.

12. The method of claim 11,
Wherein the phantom unit is made of a PMMA material and has a scale for measuring a depth of the radiation source inserted in the longitudinal direction on an outer surface thereof.

12. The method of claim 11,
Wherein the dosimeter comprises a glass dosimeter,
Wherein some of the plurality of dose plates are inserted in parallel to each other in the longitudinal direction and a part of the others is inserted in parallel to the width direction so that at least one pair of the plurality of dose plates is arranged to cross the glass dosimeters A device for inspecting a near-radiation dose installed in a phantom unit.

12. The method of claim 11,
Wherein the phantom unit has a hollow rectangular parallelepiped shape.

12. The method of claim 11,
The support portion
A support body inserted into the space and into which the radiation source is inserted;
First and second dose mounting grooves provided on the support body so as to face each other and in which one of the plurality of dose plates is installed; And
First and second photosensitive mounting grooves provided on the support body so as to face each other on the surface on which the first and second dose mounting grooves are not provided, the first and second photosensitive mounting grooves being provided with the pair of photosensitive plates;
/ RTI >
The plurality of dose plates and the pair of photosensitive plates are provided at their ends in parallel with each other in the longitudinal direction. The first and second dose mounting grooves and the fixing member for fixing the mounting position and the posture of the first and second photosensitive mounting grooves, A device for inspecting a near-radiation dose.

17. The method of claim 16,
Wherein the pair of photosensitive plates is provided with a guider hole inserted in a guider protruding from the support body to guide the installation position of the photoreceptor.

16. The method of claim 15,
Wherein the plurality of phantom units are provided so that the dose unit and the photosensitive unit are respectively inserted and supported,
A phantom mounting unit having a plurality of installation spaces partitioned so that the plurality of phantom units are installed at the same time;
And a detector for detecting the radiation dose.

19. The method of claim 18,
The phantom mounting unit includes:
Wherein the plurality of partition walls are provided so as to cross each other, and the installation spaces are arranged in a mutually parallel fashion and in multiple rows.