KR200320954Y1 - Apparatus for measuring radiation dose - Google Patents

Abstract

The present invention relates to a radiation dose measuring instrument. It is installed on the rotating gantry head portion of the linear accelerator for radiation treatment to measure the dose of radiation generated from the radiation emitting portion in the head portion, the mounting plate spaced apart from the radiation emitting portion a predetermined distance; A chamber plate embedded in the mounting plate and projecting radiation emitted from the radiation emitter on one side thereof and generating a current signal corresponding to the dose of the projected radiation; It is fixed to the mounting plate is characterized in that it comprises a signal conversion unit for receiving the current signal generated from the chamber plate is converted into a digital signal and transmitted to the external measuring equipment.

The present invention made as described above comprises a chamber plate which generates negative ions by radiation and a signal converting unit converting the negative ions of the chamber plate into digital signals and transmitting them to an external measuring device, but rotating the assembly to the assembly. It is easy and quick to set up and detachable from the head part of the head, and the price is very low, so that it is possible to perform measurement work that could not be done for economic reasons. Medical accidents can be prevented.

Description

Apparatus for measuring radiation dose

The present invention relates to a radiation dose measuring instrument, and more particularly, a radiation dose measuring instrument mounted on the head of a medical linear accelerator for outputting high energy radiation and measuring a dose of radiation output from the linear accelerator. It is about the flag.

Among the radiations used for medical treatment, radiation is applied to cancer patients' tumors so that cancer cells can no longer reproduce and are used to kill cancer cells at the end of their life or to relieve pain.

Such radiation therapy can be used to prevent recurrence, for example, in cases where cancer cells are more likely to remain after surgery, or when surgery is not possible, or when radiation therapy is more effective than surgery, or a combination of surgery and radiation therapy In order to improve the quality of life of the patient, or after the anticancer drug treatment in combination with anticancer drug treatment to maximize the anticancer effect.

On the other hand, the radiation treatment is made by expensive medical equipment called a linear accelerator (linear accelerator). The linear accelerator is capable of outputting X-rays and electron beams, and is capable of output energy control and high dose rate.

When performing radiation treatment with the linear accelerator, the most important thing is to ensure that the linear accelerator outputs radiation of suitable energy. It is very important that the linear accelerator output the radiation with the optimal energy because the tumor to be treated can be maximized by irradiating the radiation with the optimal energy corresponding to the condition, size or depth of the tumor.

Accordingly, the radiation dose measuring device that checks in advance whether the radiation output from the linear accelerator has an appropriate energy corresponding to the state of the tumor before the linear accelerator is used.

1 is a view showing for explaining the basic structure of a conventional radiation dose measuring apparatus.

As is known in the art, a linear accelerator (25 of FIG. 2) is installed inside the treatment room 11 shielded by the concrete wall 13 and a controller 21 controlling the linear accelerator is located outside the treatment room 11. Is installed. This is to prevent the person controlling the linear accelerator from being exposed to radiation. The controller 21 is usually ten meters or more away from the linear accelerator.

As shown in FIG. 1, the conventional radiation dose measuring device is located in the treatment table 15 located below the linear accelerator (25 in FIG. 2), and generates negative ions by irradiating radiation from the linear accelerator. (17), a triaxial cable (19) connected to the anion generator (17) and transmitting anions generated from the anion generator (17) to the outside of the treatment room, and a triaxial cable (outside the treatment room (11)) It includes a measuring instrument 23 that receives the negative ion transmitted through 19) and finds out the radiation dose irradiated through the size of the negative ion.

Referring to FIG. 2, the treatment table 15 is positioned below the head 29 of the rotary gantry 27 of the linear accelerator 25, and an anion generator 17 is installed on the treatment table 15. It can be seen.

The negative ion generating unit 17 generates negative ions by reacting with the radiation generated from the radiation generating unit in the head unit 29, and the ion chamber which is installed in the bucket filled with water 31 and the bucket 31 is installed ( 33). The ion chamber 33 is connected to the measurement equipment 23 outside the treatment room through the triaxial cable 19.

As shown in FIG. 3, the ion chamber 33 includes a chamber case 35 and an aluminum electrode 37 provided inside the chamber case 35. Air is filled in the chamber case 35. Various kinds of ion chambers are used, and in addition to the cylindrical chamber illustrated, a flat chamber is also used.

3 is a schematic view for explaining the configuration and operation of the radiation dose measuring apparatus of FIG.

As described above, the measurement equipment 23 connected to the ion chamber 33 is installed outside the treatment chamber 11 and has a power supply 43 and a converter 39. The power supply 43 and the converter 39 are electrically connected to the ion chamber 33 via the triaxial cable 19.

The power supply unit 43 induces a cathode to the chamber case 35 of the ion chamber 33 as a direct current power source and the weak electrode is grounded. In addition, the aluminum electrode 37 is connected to the converter 39, and eventually a circuit including the chamber case 35, the aluminum electrode 37, and the converter 39 is configured. This circuit configuration is based on basic circuit engineering theory.

When radiation is applied to the ion chamber 33 in the above state, various molecules constituting the air in the ion chamber 33 are ionized with anions and cations, and the anions are collected by the aluminum electrode 37 to the converter 39. Move.

Since the magnitude of the radiation energy applied to the ion chamber 33 and the degree of ionization of the air are proportional, the magnitude of the ions delivered to the measurement equipment 23 varies according to the magnitude of the radiation energy output from the linear accelerator. Therefore, it is possible to find out the radiation dose output based on the magnitude of the electrical signal found through the measurement equipment.

However, the conventional radiation dose measuring apparatus configured as described above has a problem that a three-axis cable connecting the ion chamber 33 and the measuring equipment 23 is necessary because the measuring equipment 23 is located outside the treatment room. The triaxial cable 19 is very expensive, of course, very delicate, high occurrence rate of the failure, and relying on the total amount of import, which is cumbersome for maintenance and takes a long time to repair in case of failure.

In addition, the conventional radiation dose measuring device has a problem that it takes a long time to set the device. For example, it takes at least 20 minutes to receive water from the bucket 31 and the measuring equipment 23 should be warmed up for at least 15 minutes.

In addition, since the measuring equipment reaches tens of thousands of dollars and the ion chamber and the three-axis cable also cost thousands of dollars, it is virtually difficult to own and operate such measuring instruments for hospital finance. Without such a measuring device, it is impossible to optimize the radiation energy size according to the characteristics of the patient's tumor. Therefore, it is impossible to prescribe radiation of the appropriate intensity, and thus the treatment effect is very low. It may cause an accident.

The present invention has been made to solve the above problems, comprising a chamber plate for generating negative ions by radiation and a signal conversion unit for converting the negative ions of the chamber plate to a digital signal and delivering them to an external measuring device, By allowing the assembly to be detachable from the head of the rotating gantry, the setting is easy, quick and particularly inexpensive, allowing measurement to be performed that was not possible for economic reasons, as well as prescribing the patient with the correct energy radiation. An object of the present invention is to provide a radiation dose measuring apparatus capable of preventing a medical accident caused by overexposure.

1 is a view showing for explaining the basic structure of a conventional radiation dose measuring instrument.

Figure 2 is a view showing a state of measuring the radiation dose of the linear accelerator using the radiation dose measuring apparatus of FIG.

3 is a schematic view for explaining the operation mechanism of the radiation dose measuring instrument of FIG.

Figure 4 is a perspective view showing a radiation dose measuring instrument according to an embodiment of the present invention.

5 is an exploded perspective view of the radiation dose measuring apparatus of FIG. 4.

6 is an exploded perspective view showing the chamber plate shown in FIG.

7 is a view schematically showing an operation mechanism of a radiation dose measuring apparatus according to an embodiment of the present invention.

8 is a view showing the radiation dose measuring apparatus installed in the head portion of the linear accelerator according to an embodiment of the present invention.

FIG. 9 is a partial cross-sectional view showing a state in which a radiation measuring device is accommodated in the mounting holder of FIG. 8. FIG.

FIG. 10 is a side view illustrating a state in which a radiation measuring device is accommodated in the mounting holder of FIG. 8. FIG.

<Explanation of symbols for the main parts of the drawings>

11: Treatment room 13: Concrete wall

15: treatment table 17: negative ion generating unit

19: 3-axis cable 21: Controller

23: measuring equipment 25: linear accelerator

27: rotating gantry 29: head

31: bucket 33: ion chamber

35: chamber case 37: aluminum electrode

39: converter 43,95: power supply

51: radiation dose measuring instrument 52: mounting plate

53: main plate 55: cover plate

57: Handle 59: Jamming Home

61: signal conversion section 63: outgoing port

65: receiving groove 69: chamber plate

71: first substrate 73: contact plate

75: second substrate 77: support

79a, 79b, 80a, 80b: conductive layer film 87, 89, 91: wire

93: through hole 97: first converter

99: second converter 102: mounting holder

104: holder frame 106: mounting screws

108: fixing bolt 110: support side

112: pressure member 114: accommodation space

116: spring 118: jam

120: internal space 122: transmission cable

In order to achieve the above object, the present invention is mounted on the rotating gantry head of the linear accelerator for radiation therapy to measure the dose of radiation generated from the radiation emitting part in the head, the shape of the plate having a predetermined thickness A mounting plate installed to be spaced apart from the radiation emitting part at a predetermined distance; A chamber plate embedded in the mounting plate and projecting radiation emitted from the radiation emitter on one side thereof and generating an electrical signal corresponding to the dose of the projected radiation; It is fixed to the mounting plate and electrically connected to the chamber plate is characterized in that it comprises a signal conversion unit for receiving the electrical signal generated from the chamber plate to convert it into a digital signal and transmit it to the external measuring equipment.

In addition, the mounting plate; The chamber plate is interposed between the main plate and the cover plate to embed the chamber plate therebetween, characterized in that made of acrylic resin to pass the radiation.

In addition, the chamber plate; The first and second substrates, each having a conductive layer film respectively connected to the signal conversion unit through a wire, are coated on the opposing surfaces spaced apart from each other in parallel and facing each other and are sealed from the outside to provide an internal space therebetween. It features.

In addition, the first substrate and the second substrate is a PCB substrate made of a PCB material, characterized in that the contact plate is further provided between the first substrate and the second substrate to maintain the gap between the first and second substrates.

In addition, the signal conversion unit; When the air in the inner space is ionized to anion and cation by providing radiation to the chamber plate from the outside by supplying the electricity of the anode and the cathode to both conductive layer films of the chamber plate, respectively, the anion flows to the one conductive layer film. A power supply to be collected, a first converter electrically connected to the one conductive layer film to receive the collected negative ions and converting the negative ions into an analog voltage signal, and connected to the first converter and converted by the first converter And a second converter converting the voltage signal into a digital voltage signal and transferring the voltage signal to an external measuring device.

In addition, the main plate is in the form of a square plate and a handle is provided on one side thereof, one of the two sides adjacent to the side where the handle is located is formed with a concave engaging groove therein, the locking groove is formed The opposite side of one side is parallel to the one side, but the separation distance from one side is different, characterized in that forming a support side formed by connecting each other in a streamlined form.

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Basically, the radiation dose measuring device according to the present invention is installed to be detachable from the head portion 29 of the rotating gantry 27 as shown in FIG. 8 and the chamber plate 69 and the signal converting portion 61 generating negative ions. ) Forms one assembly.

4 is a perspective view showing a radiation dose measuring apparatus according to an embodiment of the present invention.

Referring to the drawings, the radiation dose measuring device 51 according to the present embodiment, the main plate 53 having a predetermined thickness and takes the form of a square plate, and the cover plate 55 coupled to the main plate 53. And a chamber plate 69 provided between the main plate 53 and the cover plate 55, and electrically connected to the chamber plate 69, and receiving negative ions from the chamber plate 69. It is configured to include a signal converter 61 for converting into a signal. The main plate 53 and the cover plate 55 form one mounting plate 52.

The main plate 53 is made of an acrylic plate of a predetermined thickness and a handle 57 is provided at one side thereof to conveniently carry the radiation dose measuring instrument 51 or to easily mount it to the mounting holder 102 (FIG. 8). I can pull it out.

A locking groove 59 is formed at one side of two neighboring sides of one side where the handle 57 is located. The locking groove 59 is a groove into which the lower end of the mounting screw (106 in FIG. 9) is inserted when the radiation dose measuring device 51 is mounted in the mounting holder (102 in FIG. 8).

In addition, the support side surface 110 is formed on the opposite side of the side formed with the engaging groove (59). The support side surface 110 is made up of three surfaces that are parallel to the side where the locking groove 59 is located, and the separation distance thereof is different, and the boundary portion of each surface is streamlined. In particular, in the support side surface 110, the width w of the portion corresponding to the furthest part from the handle 57 is formed to be the narrowest. Forming the support side 110 of such a shape is intended to more easily push the main plate 53 into the mounting holder (102).

Reference numeral 63 denotes an outgoing port. The transmission port 63 is a connection port for transmitting the digital signal processed and digitized inside the signal conversion unit 61 to an external measurement device (for example, various interface devices or computer systems). According to an exemplary embodiment, the digital type electric signal may be processed once more as an infrared signal without being sent out through the transmission port 63 and then transmitted wirelessly.

5 is an exploded perspective view of the radiation dose measuring apparatus of FIG. 4.

Referring to the drawings, the radiation dose measuring apparatus according to the present embodiment, the receiving groove 65 is provided on one side and the main plate 53 for receiving the chamber plate 69 in the receiving groove 65, and A cover plate 55 that covers the chamber plate 69 and is coupled to the main plate 53, and a signal conversion unit 61 positioned at the side of the chamber plate 69 and electrically connected to the chamber plate 69. It is configured to include.

The cover plate 55 firmly fixes the chamber plate 69 by tightly coupling the main plate 53 by a plurality of bolts with the chamber plate 69 interposed therebetween.

The chamber plate 69 is a flat ion chamber that generates negative ions when irradiated with radiation from the outside. The principle of generating negative ions by the radiation of the chamber plate 69 is the same as that of the cylindrical ion chamber 33 described above.

The chamber plate 69 includes a first substrate 71, an adhesion plate 73 sequentially stacked on the first substrate 71, and a second substrate 75. The first and second substrates 71 and 75 use a PCB substrate formed of a known PCB material. In addition, the adhesion plate 73 may use an acrylic plate, and in some cases rubber or silicone may be used.

One end of the first substrate 71 is provided with a signal conversion unit 61. The support 77 is fixed on the first substrate 71 to install the signal conversion unit 61. The support 77 is an element for fixing the signal conversion unit 61 to the first substrate 71. The support 77 is located in a state in which the two are spaced apart from each other and bolted to both ends of the signal conversion unit 61, respectively.

The signal converter 61 is mounted on the main plate 53 in a state of being fixed to the first substrate 71 together with the second substrate 75.

FIG. 6 is an exploded perspective view illustrating the chamber plate and the signal conversion unit illustrated in FIG. 5.

As shown, the chamber plate 69 is composed of the first and second substrates 71 and 75 and the contact plate 73. The first and second substrates 71 and 75 are known PCB substrates, and conductive layer films 79a, 79b, 80a, and 80b of predetermined patterns are respectively coated on the inner facing surfaces thereof. The conductive layer film is a layer formed by applying a conductive metal so as to correspond to opposite surfaces of the first and second substrates 71 and 75.

In particular, circular conductive layer films 79a and 80a are formed at the center of each of the substrates 71 and 75. The conductive layer films 79a and 80a have the same diameter and face each other.

In addition, the circuit structure in the chamber plate 69 of this embodiment is the same as that of FIG. That is, the conductive layer film 79a formed at the center of the first substrate 71 is connected to the first converter (97 in FIG. 7) in the signal conversion unit 61 through the wire 91 and the second substrate ( The conductive layer film 80a formed at 75 is connected to the cathode of the power supply portion (95 in FIG. 7) in the signal conversion portion 61 through the wire 87. The anode of the power supply unit 95 in FIG. 7 is connected to the conductive layer film 80b formed at the edge of the second substrate 75 through another wire 89 and forms a ground.

Of course, the conductive layer film 80a in the center of the second substrate 75 and the conductive layer film 80b of the edge portion are spaced apart from each other.

By implementing the circuit configuration as described above, it is possible to induce a potential difference between the conductive layer films 79a and 80a facing each other to separate the cations and anions of the ions ionized in the internal space (120 in FIG. 7).

The close contact plate 73 is an acrylic plate having a predetermined thickness, has the same area as the second substrate 75, and has a through hole 93 in the center thereof. The through hole 93 includes conductive layer films 79a and 80a of the first and second substrates in its inner region. In addition, the close contact plate 73 is tightly coupled to the first substrate 71 and the second substrate 75 so that the outside between the first substrate 71 and the second substrate 75 as shown in FIG. The inner space 120 is closed about the formed.

Meanwhile, two support members 77 are further provided on the first substrate 71. The support 77 is firmly fixed to the signal conversion unit 61 with respect to the chamber plate 69 in combination with the signal conversion unit 61 in a state fixed to the first substrate (71).

7 is a diagram schematically illustrating an operation mechanism of a radiation dose measuring apparatus according to an embodiment of the present invention.

Referring to the drawings, it can be seen that the inner space 120 formed by the inner circumferential surface of the first substrate 71, the second substrate 75, and the through hole 93 is provided in the chamber plate 69. As described above, the conductive layer films 79a and 80a are coated on opposite surfaces of the first and second substrates 71 and 75 constituting the internal space 120.

In addition, the conductive layer film 80a applied to the second substrate 75 is connected to the cathode of the power supply unit 95 through the electric wire 87, and the conductive layer film 79a applied to the first substrate 71 is the electric wire. It is connected to the first converter 97 via 91. The anode of the power supply unit 95 is grounded to the second substrate 75 through a wire 89.

When radiation is applied to the chamber plate 69 in the state having the circuit configuration as described above, the air in the interior space 120 is ionized into anions and cations. As described above, the second substrate 75 side conductive layer film 80a has a negative electrode property, and the first substrate 71 side conductive layer film 79a has a positive electrode property. It moves to the conductive layer film 80a, and the ion of a cathode moves to the lower conductive layer film 79a.

Cathode ions collected on the conductive layer film 79a on the first substrate 71 side move to the first converter 97 in the signal conversion unit 61 through the wire 91.

The first converter 97 is a general converter that converts the received negative ion, that is, electrons, into a voltage. The first converter 97 is connected to the second converter 99 inside the signal converter 61. The second converter 99 is a general converter that converts an analog signal into a digital signal. Therefore, the analog voltage signal transmitted through the first converter 97 is converted into a digital voltage signal by the second converter 99.

As a result, the signal conversion unit 61 converts negative ions generated from the chamber plate 69 into digital signals.

The outgoing port 63 is connected to the output terminal of the second converter 99. The transmission port 63 is, for example, a connection port to which the external transmission cable 122 is plugged. The transmission cable 122 is connected to a measuring device such as a computer through a known interface.

In this embodiment, the signal processed by the signal converter 61 is transmitted to the external measuring device by wire, but the second converter 99 is not used without the transmission port 63 and the transmission cable 122. As described above, the digital signal generated by the conversion may be converted into an infrared signal and wirelessly transmitted to an external measuring device.

On the other hand, as the degree of ionization of air in the interior space 120 increases, the amount of electrons moving to the first converter 97 through the wire 91 increases, so that the output voltage increases. Since ionization of air in the internal space 120 is proportional to the magnitude of the applied radiation, a higher voltage is output when stronger energy radiation is applied, and a lower voltage is output when radiation of relatively small energy is applied.

As a result, the radiation dose measuring apparatus of the present embodiment can find out the dose of radiation applied based on the output voltage provided through the signal converter 61.

8 is a view showing that the radiation dose measuring apparatus according to an embodiment of the present invention is mounted on the head of the linear accelerator.

Referring to the drawings, the mounting holder 102 is provided on the bottom surface of the head 29 of the rotating gantry (27). The mounting holder 102 is fixed to the head portion 29 through the fixing bolt 108.

The mounting holder 103 has a shape of a letter c and a holder frame 104 for placing the radiation emitting window (X) at its center so as not to obstruct the radiation emitting window (X), and installed in the holder frame (104) And a mounting screw 106 whose end portion is inserted into the engaging groove 59 of the main plate 53 in a mounted state, and a pressing member (112 in FIG. 9) and a spring positioned opposite to the mounting screw 106. (116 in FIG. 9).

The holder frame 104 takes the form of a c-shaped as described above and one side is opened to accommodate the edge of the square plate-shaped main plate 53 and the main plate 53 by sliding in the direction of the arrow A or the opposite direction Can be pulled out.

As a result, the mounting holder 102 serves to position the chamber plate 69 in the lower portion of the radiation emitting window X while being installed on the bottom surface of the head portion 29. In addition, since the holder frame 104 does not obstruct radiation irradiation because it does not obstruct the radiation emitting window X, the holder frame 104 may be detached from the head portion 29 when it is not necessary to attach another separate device to the head portion 29. no need.

In addition, the handle 57 provided on the main plate 53 allows the radiation dose measuring instrument 51 to be pushed in the direction of the arrow A to the holder frame 104 or drawn out in the opposite direction.

9 and 10 are partial cross-sectional views showing a state in which the radiographic measuring device is accommodated in the mounting holder of FIG.

Referring to the drawings, it can be seen that the mounting screw 106 is provided on one side wall of the holder frame 104. The mounting screw 106 is a known screw that penetrates one side wall of the holder frame 104 and an end thereof is inserted into the holder frame 104. The head of the mounting screw 106 may be located outside the holder frame 104 to adjust the protruding distance of the end of the mounting screw 106 from the outside.

Therefore, when the radiation dose measuring device 51 is completely inserted into the holder frame 104 and the end of the mounting screw 106 is fitted into the locking groove 59, the main plate 53 with respect to the holder frame 104 is formed. It is firmly fixed and does not fall out again.

Meanwhile, in the mounting holder 102, an accommodation space 114 is formed on an opposite wall of the one side wall on which the mounting screw 106 is located, and the pressing member 112 and the spring 116 are formed in the accommodation space 114. Is provided. The accommodation space 114 is a groove formed in the surface facing the support side surface 110 of the main plate 53, the locking jaw 118 is formed at the inlet portion thereof. The locking step 118 is to support the pressing member 112 does not escape from the receiving space (114).

The pressing member 112 has a tip portion extending outward from the receiving space 114 to press the supporting side 110 so that the pressing member 112 is elastic to the main plate 53 side by the spring 116 in the receiving space 114. Supported.

Eventually, by holding the handle 57, the measuring device 51 is inserted into the mounting holder 102 and the mounting screw 106 is tightened to complete the mounting of the radiation dose measuring device 51 with respect to the mounting holder 102. In this case, in particular, the pressing member 112 elastically pressurizes the support side surface 110 of the main plate 53 so that the measuring device 51 does not shake in the mounting holder 102.

In order to remove the measuring device 51 from the mounting holder 102 in the above state, by rotating the mounting screw 106 in the opposite direction to remove the end of the mounting screw 106 from the locking groove 59, the handle 57 Grab and pull.

The present invention has been described in detail through specific embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. .

The radiation dose measuring apparatus of the present invention made as described above comprises a chamber plate that generates negative ions by radiation, and a signal converting unit converting negative ions of the chamber plate into digital signals and transmitting them to an external measuring device. The assembly is detachable to the head of the rotating gantry, so setting is easy and quick, and especially the price is very low, so that it is possible to perform the measurement work that was not possible for economic reasons, and to prescribe the radiation of accurate energy to the patient. Medical accidents caused by overexposure can be prevented.

Claims (6)

Is mounted on the rotating gantry head portion 29 of the radiation accelerator linear accelerator 25 to measure the dose of radiation generated from the radiation emitting portion in the head portion 29, A mounting plate 52 taking the form of a plate having a predetermined thickness and installed at a predetermined distance from the radiation emitting unit; A chamber plate (69) embedded in the mounting plate (52) for projecting radiation emitted from the radiation emitter on one side thereof and generating an electrical signal corresponding to the dose of the projected radiation; The signal conversion unit is fixed to the mounting plate 52 and electrically connected to the chamber plate 69 to receive an electrical signal generated from the chamber plate 69, convert it into a digital signal, and transmit it to an external measuring device. A radiation dose measuring instrument comprising: (61). The method of claim 1, The mounting plate 52 is; Comprising the chamber plate 69 interposed therebetween, the main plate 53 and the cover plate 55 to embed the chamber plate 69, characterized in that made of acrylic resin to pass the radiation Radiation dose measuring instrument. The method according to claim 1 or 2, The chamber plate (69); Conductive layer films 79a, 79b, 80a, and 80b, which are connected to the signal conversion unit 61 through wires 87, 89, and 91, respectively, are applied to opposing surfaces spaced apart from each other in parallel to each other and sealed from the outside. High energy radiation dose measuring device comprising a first substrate (71) and a second substrate (75) to provide an internal space (120) between. The method of claim 3, wherein The first substrate 71 and the second substrate 75 are PCB substrates made of a PCB material, and the first and second substrates 71 and 75 are disposed between the first substrate 71 and the second substrate 75. Radiation dose measuring device, characterized in that the contact plate 73 further maintains the gap. The method of claim 3, wherein The signal conversion unit 61; The positive and negative electrodes are supplied to both conductive layer films 79a and 80a of the chamber plate 69, respectively, and radiation is applied to the chamber plate 69 from the outside so that the air in the internal space 120 is negative and negative. A power source that allows anion to be collected into one conductive layer film 79a when ionized with a cation, A first converter (97) electrically connected to the one side conductive layer film (79a) for receiving the collected negative ions and converting the negative ions into an analog voltage signal; And a second converter 99 connected to the first converter 97 and converting the voltage signal converted by the first converter 97 into a digital voltage signal and transferring the converted voltage signal to an external measuring device. Radiation dose measuring instrument. The method of claim 2, The main plate 53 takes the form of a square plate and a handle 57 is provided on one side thereof, and a locking groove 59 recessed inward on one side of two sides adjacent to the side where the handle 57 is located. ) Is formed, the opposite side of one side of the engaging groove 59 is formed parallel to the one side, but the separation distance from one side is different and forms a support side surface 110 formed by connecting in a streamline with each other Radiation dose measuring instrument.