KR101777082B1 - Apparatus for measuring dose of radiation that can be inserted into human body - Google Patents

Abstract

The radiation dose measurement apparatus according to the present invention comprises: a tubular body unit capable of being inserted into a human body; an expansion unit provided to be selectively expandable in the body unit; and a dose unit stacked on the expansion unit to measure an amount of radiation irradiated to the human body. According to such a configuration, shape fixation and the reproducibility of a rectum are excellent and accurate radiation dose measurement is possible.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for measuring a radiation dose,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation dose measuring apparatus, and more particularly, to a radiation dose measuring apparatus which is inserted into a rectum of a human body to shape and fix a rectum to enable accurate radiation dose measurement.

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 body's internal portion.

On the other hand, in the case of proximal radiotherapy where the radioactive isotope is directly inserted into the human body, it is necessary to manage the dose of the patient before the treatment, and to check whether the accurate dose is delivered 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. In particular, as the location of the tumor, such as prostate cancer, rectal cancer and uterine cancer, is very close to the rectum, it must be located at the correct position in the rectum, and shape fixation and reproduction is required.

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.

Korean Patent No. 10-1345421

It is an object of the present invention to provide a radiation dose measuring device capable of accurately measuring a radiation dose irradiated to a patient inserted into a rectum of a human body.

It is another object of the present invention to provide a radiation dose measuring apparatus which is excellent in fixation and recall of a rectal shape and can improve dose management quality.

According to an aspect of the present invention, there is provided an apparatus for measuring a radiation dose, comprising: a body unit having a tubular shape insertable into a human body; an expansion unit selectively expandable to the body unit; And a dose unit for measuring the amount of radiation irradiated onto the human body.

According to one aspect of the present invention, the body unit may include an insertion tube extending in the longitudinal direction so as to be insertable into the human body and formed of a flexible material, a guide member inserted in the longitudinal direction of the insertion tube to guide insertion of the insertion tube A guider, and a stopper protruding from the insertion tube and limiting a depth of insertion of the insertion tube.

According to one aspect of the present invention, the outer surface of the insertion tube may be provided with a ruler capable of recognizing the insertion length inserted into the human body.

According to one aspect of the present invention, at least a part of the distal end of the insertion tube may be formed of a material having a hardness higher than the hardness of the remaining region to guide insertion of the insertion tube relative to the insertion direction of the insertion tube.

According to one aspect of the present invention, the inflating unit may be formed of an elastic material that is bulky and expandable at an insertion end of the body unit with respect to the inserting direction in which the body unit is inserted into the human body, and may be connected to an inflation supply unit for supplying the inflating agent.

According to an aspect of the present invention, the inflation and supply unit may supply the fluid through the inflation passage formed through the inside of the body unit and connectable with the inside of the inflation member.

According to one aspect, the radiation dose unit includes at least one radiation dose meter inserted into the human body for measuring the radiation dose, and the radiation dose meter includes a glass dosimeter, a TLD (Thermoluminescence Dosimeter) dosimeter, a metal oxide field effect transistor , An optical fiber, and an EBT film.

According to one aspect of the present invention, the dose unit may include a housing member including first and second pockets stacked on the outer surface of the expansion unit, the first and second pockets being stacked on each other with a space insertable therein, A first dose member to be inserted, and a second dose member to be inserted into a second pocket of the pocket member.

According to one aspect, the first and second dose members each include at least one of a glass dosimeter, a TLD (Thermoluminescence Dosimeter) dosimeter, a metal oxide field effect transistor (MOSFET) dosimeter, an optical fiber, and an EBT .

According to one aspect of the present invention, the expansion unit may be provided with at least one position indicator for detecting a position of the expansion unit inserted into the human body.

According to one aspect of the present invention, a tip for guiding insertion of the expansion unit into the human body may protrude from the distal end of the expansion unit with respect to an insertion direction inserted into the human body.

According to one aspect of the present invention, a cover unit for covering the expansion unit provided with the dose unit may be included.

According to one aspect of the present invention, there is provided a control unit for controlling the length of the expansion unit, the control unit comprising: a first adjustment member movable in the longitudinal direction of the body unit so as to be in close contact with the expansion unit; And a second adjusting member screwed to fix the first adjusting member.

According to another aspect of the present invention, there is provided an apparatus for measuring a radiation dose, comprising: a body unit formed of a flexible material so as to be insertable into a rectum of a human body; an expandable unit provided in the body unit and selectively expandable depending on whether inflation agent is supplied; And a dose unit that includes at least one dosimeter provided in the expansion unit and measures the amount of radiation irradiated to the human body.

According to one aspect of the present invention, the body unit may include an insertion tube extending in the longitudinal direction and formed of a flexible material, and a stopper protruding from the insertion tube.

According to one aspect of the present invention, a guider hole into which a plug for guiding insertion of the insertion tube is inserted is formed in a longitudinal direction of the insertion tube, and a gas and an expanding agent can be discharged through the guider hole.

According to one aspect of the present invention, the outer surface of the insertion tube may be provided with a ruler capable of recognizing the insertion length inserted into the human body.

According to one aspect of the present invention, at least a part of the distal end of the insertion tube may be formed of a material having a hardness higher than the hardness of the remaining region to guide insertion of the insertion tube relative to the insertion direction of the insertion tube.

According to one aspect of the present invention, the inflating unit is formed of an elastic material which is bulky and expandable at an insertion end of the body unit with respect to an inserting direction in which the body unit is inserted into the human body. The inflating unit includes an inflation channel And an expansion supply unit connected with the expansion supply unit.

According to one aspect of the present invention, the expansion unit may be provided with at least one position indicator for detecting a position of the expansion unit inserted into the human body.

According to one aspect of the present invention, the dose unit may include a housing member including first and second pockets stacked on the outer surface of the expansion unit, the first and second pockets being stacked on each other with a space insertable therein, A first dose member to be inserted; And a second dose member inserted into a second pocket of the pocket member.

According to one aspect, the first and second dose members each include at least one of a glass dosimeter, a TLD (Thermoluminescence Dosimeter) dosimeter, a metal oxide field effect transistor (MOSFET) dosimeter, an optical fiber, and an EBT .

According to one aspect of the present invention, a cover unit for covering the expansion unit provided with the dose unit may be included.

According to one aspect of the present invention, a tip for guiding insertion of the expansion unit into the human body may protrude from the distal end of the expansion unit with respect to an insertion direction inserted into the human body.

According to one aspect of the present invention, a tip for guiding insertion of the inflation unit into the human body is protruded from the distal end of the inflation unit with respect to the inserting direction inserted into the human body, Can be fixed.

According to one aspect of the present invention, there is provided a control unit for controlling the length of the expansion unit, the control unit comprising: a first adjustment member movable in the longitudinal direction of the body unit so as to be in close contact with the expansion unit; And a second adjusting member screwed to fix the first adjusting member.

According to the present invention having the above-described configuration, firstly, the inflation of the inflating agent in the rectum of the human body causes inflation of the rectum, so that rectal shape fixation and reproducibility for measuring the radiation dose are excellent.

Second, it is easy to insert into the rectum and it is possible to manage the degree of insertion, and the radiation dose can be measured at the correct position.

Third, since it is possible to measure the radiation dose at the correct position by inserting directly into the rectum, it is advantageous to improve the reliability of the treatment according to the improvement of the accuracy of the radiation dose quality control.

FIG. 1 is a plan view schematically showing a radiation dose measuring apparatus according to a first preferred embodiment of the present invention.
Fig. 2 is a side view schematically showing the radiation dose measuring apparatus shown in Fig. 1. Fig.
Fig. 3 is a cross-sectional view schematically showing the line III-III in Fig. 1; Fig.
4 is a cross-sectional view schematically showing the line IV-IV in Fig.
Fig. 5 is a plan view schematically showing the dose unit shown in Fig. 1. Fig.
FIG. 6 is a cross-sectional view schematically showing the region VI of FIG. 2. FIG.
7 is a side view schematically showing a radiation dose measuring apparatus according to a second preferred embodiment of the present invention.
FIG. 8 is a schematic enlarged view of a part of the radiation dose measuring apparatus according to the second embodiment shown in FIG.
FIG. 9 is a side view schematically showing a radiation dose measuring apparatus according to a third preferred embodiment of the present invention.
10 is a side view schematically showing the X region of FIG. 9 in an enlarged manner. And,
FIG. 11 is a side view schematically showing a length-controlled state of the radiation dose measuring apparatus according to the third embodiment shown in FIG.

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

FIG. 1 is a plan view schematically showing a radiation dose measuring apparatus 1 according to a first preferred embodiment of the present invention, and FIG. 2 is a side view schematically showing the radiation dose measuring apparatus 1 shown in FIG. 1 .

1 and 2, a radiation dose measuring apparatus 1 according to a first preferred embodiment of the present invention includes a body unit 10, an expansion unit 20, and a dose unit 30. [

For reference, the radiation dose measuring device 1 described in the present invention is a device for measuring the amount of near-infrared radiation used for measuring the radiation dose for the quality control of brachytherapy radiation treatment. Further, the radiation dose measuring apparatus 1 according to the present invention is inserted through a rectum (not shown) provided inside the human body, and measures the amount of radiation irradiated to neighboring organs such as prostate and uterus located near the rectum do.

The body unit 10 has a tubular shape extending in the longitudinal direction so as to be inserted into the human body. In this body unit 10, the body unit 10 includes an insertion tube 11, a guider 12, and a stopper 13.

The insertion tube 11 extends in the longitudinal direction and can be inserted into the inside of the human body. The insertion tube 11 may be formed of a flexible material having a round cross-section, that is, a curved circumferential surface and bent to facilitate insertion into the human body. 3 and 4, the insertion tube 11 is provided with a tube of a hollowed-out type.

On the other hand, on the outer surface of the insertion tube 11, a ruler 14 is provided in the longitudinal direction so as to recognize the insertion length inserted into the inside of the human body.

The guider 12 is inserted in the longitudinal direction of the insertion tube 11 to guide the insertion of the insertion tube 11. That is, when the insertion tube 11 formed of a flexible material is inserted into the human body, the guider 12 is inserted into the body of the insertion tube 11 so that the insertion tube 11 can be easily inserted into a desired path, Guide entry. The guider 12 is inserted into the insertion tube 11 through a guider hole 15 formed in the insertion tube 11 as shown in FIG.

The stopper 13 protrudes from the insertion tube 11 and restricts the insertion depth of the insertion tube 11 inserted into the human body. The stopper 13 protrudes in the circumferential direction of the insertion tube 11 as shown in Fig. 4, and has a curved outer surface. The stopper 13 restricts insertion of the insertion tube 11 into the human body only from the insertion end to the position of the stopper 13 based on the insertion direction of the insertion tube 11 inserted into the inside of the human body.

On the other hand, the stopper 13 is made of a material having a low hardness, such as an elastic material, so that it is preferable to buffer shocks when the stopper 13 comes into contact with the human body.

The expansion unit 20 is provided at one side of the body unit 10 and is optionally bulky. That is, the volume of the inflating unit 20 varies depending on the amount of the inflating agent F (refer to FIG. More specifically, the expansion unit 20 is provided at the insertion end of the body unit 10 with respect to the insertion direction D in which the body unit 10 is inserted into the human body, And is formed of an elastic material that can be inflated by the same inflating agent (F).

The expansion unit 20 is connected to an expansion supply unit 21 that selectively supplies an inflator F for volume expansion to the inside of the expansion unit 20 via the body unit 10. More specifically, the inflation and supply section 21 penetrates the inside of the insertion tube 11 through the rear side with reference to the insertion direction D of the insertion tube 11 as shown in FIG. 1, And is connected to an expansion passage (16) which can be connected to the inside of the expansion unit (20). The expansion passage 16 extends in the longitudinal direction of the insertion tube 11 and supplies the inflation agent F into the expansion unit 20 provided at the insertion end of the insertion tube 11.

For reference, the inflating agent (F) includes, but is not limited to, a fluid such as water.

A tip 22 for guiding insertion of the expansion unit 20 into the human body is protruded from the distal end of the expansion unit 20 with respect to the insertion direction D of the expansion unit 20. The tip 22 has a length of about 1 cm or less and is provided with a diameter smaller than the diameter of the expansion unit 20 and is connected to the insertion tube 11 provided inside the expansion unit 20. Here, the tip 22 may be screwed to the insertion tube 11 provided in the expansion unit 120.

A tip hole (22a) communicating with the guider hole (15) may be formed through the tip (22). The gas and the inflator F can be discharged through the tip hole 22a and the guider hole 15. For reference, in this embodiment, the tip hole 22a is formed in the tip 22, but the present invention is not limited thereto, and a modification in which the tip hole 22a is not formed through is possible.

On the other hand, the expansion unit 20 is provided with at least one position indicator 23. The position indicator 23 inspects the expansion unit 20 using a separate imaging device in a state where the position indicator 23 is inserted into a human body, that is, inside the rectum, to confirm whether the position of the expansion unit 20 is located in the object. The position indicator 23 is exemplified as a light emitter formed of a material without a metal artifact so as not to affect images of other objects.

Three position markers 23 are provided so as to be positioned at the tip 22 of the expansion unit 20, the central region of the expansion unit 20 and the rear end position of the expansion unit 20 As shown in FIG. It goes without saying that the number, position and shape of the position indicator 23 are not limited to the illustrated examples.

For reference, the above-described expansion unit 20 has a circular balloon shape having a diameter of about 2 to 5 cm and a length of 5 to 10 cm, more preferably a length of 7.5 cm, a width of 3 cm, And has an internal capacity. However, the present invention is not limited thereto, and the expansion unit 20 can be modified into various shapes such as a cylinder shape and a crescent shape, and the diameter and the length can also be changed.

The dose unit 30 is provided in the expansion unit 20 as shown in Figs. 1 and 2, and measures an amount of radiation irradiated to the human body. The dose unit 30 includes at least one dosimeter inserted into the human body to measure the amount of radiation. In the present embodiment, the dose unit 30 includes a pocket member 31, a first dose member 32, and a second dose member 33 as shown in Fig. 5, . However, the present invention is not limited thereto, and various modifications are possible in which the dose unit 30 is constituted by a single dosimeter or includes three or more dosimeters.

The pocket member 31 is provided on the outer surface of the expansion unit 20 as shown in FIGS. 1 and 2, and has a space that can be inserted therein. More specifically, the pocket member 31 has first and second pockets 31a and 31b which are stacked in a multilayered manner.

The first dose member 32 is inserted into the first pocket 31a of the pocket member 31 and the second dose member 33 is inserted into the second pocket 31b of the pocket member 31. [ The first and second dose members 32 and 33 may be at least one of a glass dosimeter, a TLD (Thermoluminescence Dosimeter) dosimeter, a metal oxide field effect transistor (MOSFET) dosimeter, an optical fiber, and an EBT .

In the present embodiment, the first dose member 32 is inserted into the first pocket 31a including the EBT film, which is a photosensitive film capable of obtaining a radiation distribution with a relatively large area as compared with other dosimetry systems. In addition, the second dose member 33 includes a glass dosimeter which is inserted into a second pocket 31b stacked on the first pocket 31a. As a result, the radiation dosimetry can be performed together with the distribution of the radiation of the first and second dose members 32 and 33. [

The operation of measuring the radiation dose of the radiation dose measuring apparatus 1 according to the first embodiment of the present invention will be described with reference to FIG.

1, an expanding unit 20 and a dose unit 30 are provided at the insertion end of the body unit 10 and inserted into the human body in the insertion direction D. As shown in FIG. The radiation dose measuring apparatus 1 is provided with a guider 12 inserted into a guider hole 15 penetrating through a insertion tube 11 of a body unit 10 through a rectum inside the human body, Is guided. In addition, the body unit 10 formed of a flexible material corresponding to the rectilinear shape having a curved shape also enters the inside of the rectum while being bent.

The depth inserted by the stopper 13 provided in the insertion tube 11 is limited. At this time, the position indicator 23 is detected through the separate image means so that the position of the insertion unit of the expansion unit 20 and the dose unit 30 is detected by an external user. Further, as shown in Fig. 2, when insertion of the insertion tube 11 is completed, the guider 12 for guiding the insertion can be separated.

The inflation unit 20 receives the inflation agent F from the inflation supply unit 21 through the inflation passage 16. When the inflation unit 20 enters the rectum, As a result, as shown in Fig. 3, the inflating agent F is supplied into the expansion unit 20, thereby expanding the volume and fixing the shape of the rectum. The dose unit 30 provided in the expansion unit 20, which has been bulged in the state of being inserted into the rectum, measures the amount of radiation irradiated to the affected part.

5 and 6, the amount of the radiation is set so as to be equal to or greater than the amount of radiation that is applied to the first and second pockets 31a and 31b of the pocket member 31 provided on the outer surface of the expansion unit 20. [ 1 and the second dose member 32 (33). Here, the first dose member 32 includes the EBT film as the photosensitive film and the second dose member 33 includes the glass dosimeter, so that the distribution can be obtained together with the measurement of the radiation dose.

Referring to FIG. 7, a radiation dose measuring apparatus 100 according to a second preferred embodiment of the present invention is shown.

7, the radiation dose measuring apparatus 100 according to the second embodiment includes a body unit 110, an expansion unit 120, a dose unit 130, and a cover unit 140, similar to the first embodiment. .

The body unit 110 has an insertion tube 111 which can be inserted into the human body and a ruler 114 for confirming the insertion length is provided on the outer surface of the insertion tube 111. An inflation passage 116 of an inflating agent F (see FIG. 3) for inflating the inflation unit 120 is formed through the insertion tube 111 and the insertion depth is limited by the stopper 113.

The body unit 110 is formed of a flexible material so as to be bent in accordance with the shape of the curved rectangle. A part of the tip of the body unit 110 with respect to the insertion direction D is formed of a material having a hardness As shown in FIG. 8, the distal end 111a of the insertion tube 111 is formed of a rigid material so that insertion is not guided by the guider 12 as in the first embodiment, It is easy to enter. In addition, the region 111b except for the tip 111a of the insertion tube 111 is formed of a flexible material in a manner similar to that of the first embodiment, and is provided so as to be capable of bending corresponding to the shape of the rectum.

The expansion unit 120 is provided in the insertion tube 111 and is optionally bulky and inflatable. Since the configuration of the expansion unit 120 is similar to that of the first embodiment, detailed illustration and description are omitted.

The dose unit 130 is provided in the expansion unit 120 to measure the amount of radiation inside the human body. This dose unit 130 includes a pocket member 131, a first dose member 132 and a second dose member 133. [

Since the dose unit 130 is similar to the first embodiment described above, detailed illustration and description are omitted. 8, the second dose member 133 is provided in the second row and the third row unlike the first embodiment, and the type and the number of the second dose member 133 are But the present invention is not limited to the illustrated examples and can be variously changed.

The cover unit 140 covers the expansion unit 120 provided with the dose unit 130. The cover unit 140 protects the dose unit 130 provided on the outer surface of the expansion unit 120 and prevents damage to the inside of the human body by the dose unit 130 when inserted into the rectum. Further, since the cover unit 140 is formed of a smooth material, it guides the insertion into the human body more smoothly.

The cover unit 140 is posture-fixable by a tip 122 protruding from an insertion end of the expansion unit 120. The tip 122 secures the cover unit 140 relative to the expansion unit 120 for precise positioning of the cover unit 140 relative to the expansion unit 120.

Referring to FIG. 9, a radiation dose measuring apparatus 200 according to the third embodiment is shown. 9 includes a body unit 210, an expansion unit 220, a dose unit 230, a cover unit 240, and a control unit 250. The body unit 210, the expansion unit 220, do.

The body unit 210 includes an insertion tube 211 and a stopper 213 having a scale 213 and an expansion passage 216. The expansion unit 220 includes a tip 222 and a position indicator 223 And is provided on the inserting end side of the insertion tube 211. The dose unit 230 is provided in the expansion unit 220 and the cover unit 240 covers the dose unit 230. Since the structures of the body unit 210, the expansion unit 220, the dose unit 230 and the cover unit 240 are similar to those of the second embodiment, detailed description and illustration are omitted.

The adjustment unit 250 according to the third embodiment includes first and second adjustment members 251 and 252, as shown in Fig.

The first adjustment member 251 is provided to be movable in the longitudinal direction of the insertion tube 211 of the body unit 210 so as to be in close contact with the expansion unit 220. Further, the second adjusting member 252 is screwed to the first adjusting member 251 to fix the first adjusting member 251. To this end, the first and second adjusting members 251 and 252 are provided with first and second threads 253 and 254, respectively, and are screwed together.

10 and 11, the adjustment unit 250 having such a configuration presses the expansion unit 220 in which the first adjustment member 251 is in close contact in the direction of the arrow to adjust the desired length, and the second adjustment member 252 are rotated toward the first adjusting member 251 side and screwed to fix the posture. Conversely, although not shown in detail, the first adjusting member 251 may be moved in the opposite direction of the arrows shown in FIGS. 10 and 11 and the second adjusting member 252 may fix it.

For reference, it is preferable that the adjustment unit 250 adjusts the length of the expansion unit 220 to approximately 6 cm to 10 cm. In addition, the first adjusting member 251 closely attached to the expansion member 220 may be provided with a position indicator 223.

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, 200: radiation dose measuring device 10, 110, 210: body unit
11, 111, 211: insertion tube 20, 120, 220: expansion unit
30, 130, 230: a dose unit 31, 131: a pocket member
32, 132: first dose member 33, 133: second dose member
140, 240: Cover unit 250: Control unit
251: first adjusting member 252: second adjusting member

Claims (26)

A body unit having a tubular shape insertable into a human body;
An expansion unit selectively expandable to the body unit; And
And a dose unit stacked on the expansion unit and measuring an amount of radiation irradiated on the human body,
The body unit includes:
An insertion tube extending in the longitudinal direction so as to be inserted into the human body and formed of a flexible material;
A guider inserted in the longitudinal direction of the insertion tube to guide insertion of the insertion tube; And
And a stopper protruding from the insertion tube to limit an insertion depth of the insertion tube.
delete The method according to claim 1,
Wherein a ruler is provided on an outer surface of the insertion tube to recognize an insertion length inserted into the human body.
The method according to claim 1,
Wherein at least a part of a distal end of the insertion tube is formed of a material having a hardness higher than a hardness of the remaining region so as to guide insertion of the insertion tube in a direction of insertion into the human body.
The method according to claim 1,
Wherein the expanding unit is formed of an elastic material capable of expanding in volume at an insertion end of the body unit based on an inserting direction in which the body unit is inserted into the human body and connected to an expansion supply unit for supplying an inflating agent.
6. The method of claim 5,
Wherein the inflatable supply unit is formed to penetrate the inside of the body unit and supplies the inflator through an inflation channel connectable with the inside of the inflating unit.
The method according to claim 1,
Wherein the dose unit includes at least one dosimeter inserted into the human body to measure a dose of radiation,
Wherein the dosimeter comprises at least one of a glass dosimeter, a TLD (Thermoluminescence Dosimeter) dosimeter, a metal oxide field effect transistor (MOSFET) dosimeter, an optical fiber, and an EBT film.
The method according to claim 1,
Wherein the dose unit comprises:
A pocket member stacked on an outer surface of the expansion unit, the pocket member including first and second pockets stacked on each other with a space insertable therein;
A first dose member inserted into a first pocket of the pocket member; And
A second dose member inserted into a second pocket of the pocket member;
And a radiation detector for detecting the radiation dose.
9. The method of claim 8,
Wherein each of the first and second dose members includes at least one of a glass dosimeter, a TLD (Thermoluminescence Dosimeter) dosimeter, a MOSFET (metal oxide field effect transistor) dosimeter, an optical fiber, .
The method according to claim 1,
Wherein the expansion unit is provided with at least one position indicator for detecting a position inserted into the human body.
The method according to claim 1,
Wherein a tip for guiding insertion of the expansion unit into the human body is protruded from the distal end of the expansion unit based on an insertion direction inserted into the human body.
12. The method according to any one of claims 1 to 11,
A cover unit covering the expansion unit provided with the dose unit;
And a radiation detector for detecting the radiation dose.
12. The method according to any one of claims 1 to 11,
An adjustment unit for adjusting a length of the expansion unit;
/ RTI >
The adjustment unit includes:
A first adjusting member which is movable in a longitudinal direction of the body unit so as to be in close contact with the expansion unit; And
A second adjusting member screwed to the first adjusting member and fixing the first adjusting member;
And a radiation detector for detecting the radiation dose.
delete delete delete delete delete delete delete delete delete delete delete delete delete

Images