KR101820863B1 - Phantom device for radiation dosimetry - Google Patents

Phantom device for radiation dosimetry Download PDF

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KR101820863B1
KR101820863B1 KR1020160017726A KR20160017726A KR101820863B1 KR 101820863 B1 KR101820863 B1 KR 101820863B1 KR 1020160017726 A KR1020160017726 A KR 1020160017726A KR 20160017726 A KR20160017726 A KR 20160017726A KR 101820863 B1 KR101820863 B1 KR 101820863B1
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South Korea
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radiation
water
hollow tube
water tank
dose
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KR1020160017726A
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Korean (ko)
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KR20170096399A (en
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정동혁
김미영
임희진
이만우
양광모
김진기
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한국원자력의학원
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1048—Monitoring, verifying, controlling systems and methods
    • A61N5/1075—Monitoring, verifying, controlling systems and methods for testing, calibrating, or quality assurance of the radiation treatment apparatus
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1048—Monitoring, verifying, controlling systems and methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/161—Applications in the field of nuclear medicine, e.g. in vivo counting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1048—Monitoring, verifying, controlling systems and methods
    • A61N5/1075—Monitoring, verifying, controlling systems and methods for testing, calibrating, or quality assurance of the radiation treatment apparatus
    • A61N2005/1076—Monitoring, verifying, controlling systems and methods for testing, calibrating, or quality assurance of the radiation treatment apparatus using a dummy object placed in the radiation field, e.g. phantom

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  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Molecular Biology (AREA)
  • High Energy & Nuclear Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

The present invention relates to a phantom device manufactured by using a hollow tube and a water tank for the purpose of inspecting output radiation dose of a radiotherapy apparatus. A phantom device for measuring a radiation dose according to the present invention is a phantom device for measuring the amount of radiation irradiated from a radiation generator. The phantom device includes a water tank in the form of a container and an inner space for submerging in the water filled in the water tank Wherein the hollow tube is provided with a radiation measuring device in a detachable state so as to be separated from water to be filled in the water tank, And the amount of radiation output is measured. According to such a configuration, since a standard set-up operation for measurement of the radiation dose can be performed by a water tank that is standardized so that the desorption structure of the radiation dose measuring element becomes a set having a standardized value, It is possible to remarkably improve the usability and practicality as well as the measurement efficiency and precision.

Description

[0001] The present invention relates to a phantom device for radiation dosimetry,

FIELD OF THE INVENTION The present invention relates to a phantom device for measuring radiation dose, and more particularly, to a phantom device for measuring radiation dose, and more particularly to a phantom device for measuring radiation dose, The present invention relates to a phantom device for dosimetry of a radiotherapeutic apparatus settled so that the desorption structure of a radiation dose measuring device such as a glass dosimeter is standardized so that the output radiation dose of the radiation therapy apparatus can be conveniently and quickly checked.

For example, radiotherapy for the treatment of diseases such as cancer (cancer) usually requires an inpatient treatment of the patient due to a relatively short treatment time of about 1 hour, and it is advantageous that the patient does not suffer any pain in the course of treatment And it is widely known as one of the three treatment methods of cancer treatment together with surgical operation and chemotherapy.

Particularly, in the medical field, radiation treatment is performed to quantitatively dose the radiation dose by precise control so that the same amount of radiation as the treatment plan is irradiated to each organs and cancer cells of the patient, Do.

Therefore, before using the radiation therapy apparatus, it is essential that quality control (quality control) is performed in advance to confirm the abnormality and the operation precision of the normal radiation dose and the output state.

Actually, at the medical institutions operating the radiation treatment apparatus, based on the provisions of Article 5 (Quality Control) of <Technical Standard for Radiation Safety Management in the Medical Field> of the "Nuclear Safety Commission Notice No. 2015-005" The quality control of the treatment device or the radiotherapy device is performed on its own periodically or irregularly.

According to Article 7 (7) of the Notification, medical institutions should be subject to independent quality audits by external organizations. (For reference, detailed quality control items at this time are described in detail in the annexed table of the notification).

Therefore, the relevant inspection or authorized organization can visit the medical institution with the equipment and equipment necessary for the inspection and carry out the quality audit. At this time, the present invention is directly related to the inspection of X-ray and electron beam output agreement among the items listed in the annexes of the notification. For reference, in the specification of the present invention, X-ray and electron beam are defined as radiation in a usual term.

Generally, the radiation dose inspection of a radiation treatment apparatus is carried out by an inspection institution having a measurement technique, and a radiation dose measuring instrument called a phantom, which is made to be capable of measuring radiation in place of a human body, It is known as the most reliable way to measure the dose.

However, there is a disadvantage in that the inspection agency has to determine and secure the measurement time by avoiding the patient's treatment time in advance at the visit inspection of each medical institution, and it is troublesome that the concerned medical institution needs active cooperation.

Considering that approximately 160 radiotherapy facilities are currently used at 80 medical institutions nationwide (mostly university hospital), the method of inspecting all the medical facilities scattered throughout the country and examining the radiation dose is as follows: There is a problem that efficiency and practicality are very poor in terms of inspection time.

In addition, if the medical institution does not actively consider the visit measurement, it is very difficult to check all the institutions within a predetermined period.

Therefore, the radiation dose testing method that is currently being performed is to send a simple kit in the form of a kit to each of the medical institutions by the inspection agency, and the testee of each medical institution constructs a phantom to directly measure the radiation dose Postal dosimetry is often carried out, in which the inspection tool is returned to the inspection body by post and the results are verified.

As a representative example of postal measurement as described above, TLD (Thermo luminance dosimeter) jig method and IROC (Imaging and Radiation Oncology Core) method are known.

That is, the TLD jig method is a radiation dose testing method using a thermoluminescent dosimeter (TLD) device, which was implemented by the Korea Food and Drug Administration (KFDA / KFDA) since 2004. This test method uses only a TLD device and a jig (Phantom), which is a medium for measuring radiation dose, must be prepared by the examinee (each medical institution). Accordingly, since a uniform sized water tank (phantom) is not provided during the measurement process, it is difficult to maintain the consistency and coherence among the examinees, which causes a lot of error factors, resulting in poor measurement accuracy and reliability.

In TLD jig method, the use frequency is gradually reduced due to inconvenience of use such as heat treatment for about 2 hours for reading and reuse of TLD device, while the use of optically stimulated luminosity dosimeter (OSLD: Optically Stimulated Luminance Dosimeter) or glass A dosimeter (GD: Glass Dosimeter) is being replaced.

The Imaging and Radiation Oncology Core (IROC) method measures the radiation dose using an acrylic phantom having a built-in optical stimulus dosimeter (OSLD). The IROC is an Imaging and Radiation Oncology Core ) Is conducted by radiation dose management and external quality control services.

Therefore, when the IROC is inspected, the acrylic phantom with the OSLD dosimeter can be received by international mail. The inspector (the examinee) mounts the acrylic phantom received from the IROC under the radiotherapy apparatus, irradiates a certain amount of radiation, The IROC inspection method is sent to the IROC by international mail and the read result can be received by e-mail. The IROC inspection method has a disadvantage in that the inspection precision and reliability are relatively inferior because acrylic phantom is used instead of water.

SUMMARY OF THE INVENTION The present invention has been made in view of the technical background as described above and it is an object of the present invention to solve the problems of the background art described above, It can not be said to have been publicly known to the general public before.

Korean Registered Patent No. 10-1313305 Korean Patent Publication No. 10-1241108 Korean Patent Publication No. 10-0808111 Korean Patent Publication No. 10-0750991 Korean Patent Publication No. 10-0513692

The present invention has been made in view of the problems and disadvantages of the phantom device for dose checking of the conventional radiotherapy apparatus as described above, and it is an object of the present invention to provide a phantom device, And a standard and efficient set-up operation for measuring the radiation dose by a water tank which is standardized so as to make a phantom device for a dose examination of a radiation therapy apparatus.

It is another object of the present invention to provide a phantom device for dose checking of a radiation therapy apparatus capable of significantly improving convenience and practicality in use as well as measurement efficiency and precision of a radiation dose by a standard set-up operation .

According to an aspect of the present invention, there is provided a phantom device for inspecting a dose of a radiation therapy apparatus, the phantom device for measuring a radiation dose irradiated from a radiation generator, (Hollow tube) provided in the form of a bridge for traversing the inner space so as to be submerged in the water filled in the water tank, and the radiation dose measuring device is installed in the hollow space of the upper- And the amount of radiation output from the radiation generator is measured in a state in which the radiation detector is set so as to be isolated from the water to be filled in the water tub.

In the phantom device for dose checking of a radiation therapy apparatus according to the present invention having the above-described configuration, it is preferable that the water tank is provided with a level indicator for a water filling guide.

The gap between the level indicator for the water filling guide and the hollow tube is preferably arranged to be substantially the same as the horizontal and vertical dimensions of the irradiation surface.

According to an aspect of the present invention, it is preferable that the hollow tube is provided so that the depth of immersion in the water from the water level filled in the water tank, that is, the level indicator for the water filling guide, is arranged at 10 ± 0.1 cm. In order to limit the immersion depth of the hollow tube to 10 ± 0.1 cm, it is intended to satisfy the recommendation of the International Atomic Energy Agency Technical Report (TRS-398).

In addition, the hollow tube may have a configuration in which a light emitting portion for confirming whether the radiation dose measuring device is embedded is provided in only a part of a section.

According to another aspect of the present invention, it is possible to further include an insertion rod set to be inserted into both sides of the radiation dose measuring device embedded in the hollow tube.

It is preferable that the insertion bar is provided with a recognition mark for recognizing the state of being embedded in the hollow tube.

According to an aspect of the present invention, it is preferable that the water tank, the hollow tube, and the insertion rod are made of transparent acrylic.

According to the phantom device for examining a dose of a radiation therapy apparatus according to the present invention, a standard set-up for measurement of radiation dose is performed by a water tank which is standardized so that the desorption structure of the radiation dose measuring device becomes a standardized set ), It is possible to remarkably improve convenience and practicality in use as well as measurement efficiency and precision of the radiation dose. Accordingly, not only the inspection time for measuring the radiation dose can be minimized, but also reproducibility and reliability can be greatly improved.

In addition, the phantom device for examining a dose of a radiation therapy apparatus according to the present invention provides convenience of a dose examination process in that an examiner can directly insert the device into a desired position without being immersed in water.

FIG. 1 and FIG. 2 are respectively a schematic perspective view and a combined perspective view of a phantom device for dose checking of a radiotherapy apparatus according to the present invention in different directions.
3 is a schematic cross-sectional view of a phantom device for dose checking of a radiotherapy apparatus according to the present invention shown in Fig.
FIG. 4 is a schematic cross-sectional view illustrating an essential portion of a phantom device for a dose examination of a radiation therapy apparatus according to the present invention. FIG.
FIG. 5 is a photographed photograph of a set-up state for measuring a radiation dose using a phantom device for dose examination of a radiation therapy apparatus according to the present invention. FIG.
FIG. 6 and FIG. 7 are schematic views showing a state in which a radiation dose is measured using a phantom device for dose examination of a radiation therapy apparatus according to the present invention, respectively.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a phantom device for inspecting a dose of a radiation therapy apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that both the foregoing description and the accompanying drawings are merely exemplary and are not to be construed as limiting the scope of the present invention as defined by the appended claims. The parts that the engineer can easily implement can be omitted.

1 and 2 of the accompanying drawings are respectively a schematic perspective view and a combined perspective view showing a phantom device for dose examination of a radiotherapy apparatus according to the present invention in different directions, Sectional view including a hollow tube portion of a phantom device for dose examination of a radiotherapy apparatus according to the present invention. FIG. 4 is a schematic cross-sectional view illustrating the essential part of a phantom device for dose measurement of a radiation therapy apparatus according to the present invention.

1 to 4, a phantom device 100 for dose examination of a radiotherapy apparatus according to the present invention includes a water tank 110 having a container shape capable of storing water by being filled therein, And a hollow tube 120 provided in the form of a bridge that traverses the inner space in a state where the charged water 101 is submerged. Water 101 is filled in the water tub 110 and a radiation dose measuring device 130 such as a glass dosimeter is inserted into the hollow tube 120. In this state, And is set to form a phantom device for measurement.

According to the present invention, it is preferable that the water tub 110 is formed in a tubular container having an open top, and is formed in the form of a square box or a rectangular box as shown in the figure, But may be made of various types of cylindrical vessels capable of filling water, such as, for example, a cylindrical shape.

According to an aspect of the present invention, the water tank 110 is preferably made of transparent acrylate having a thickness of 0.5 to 1.0 cm to form a phantom of a medium closest to the human body.

The water tank 110 is provided with a level indicator P for water filling guide.

delete

Accordingly, the phantom device 100 for a dose examination of a radiation therapy apparatus according to the present invention can easily adjust the water in the water tub 110 based on the level indicator P during a setting operation for measuring the radiation dose by an operator, .

5 is a photographic view of the phantom device 100 for dose checking of the radiation therapy apparatus of the present invention in which the water tank 110 is actually made of transparent acrylic.
According to a preferred embodiment of the present invention, when the radiation irradiation surface (X to X: X1) output from the radiation generator (refer to 10 in Figs. 6 and 7) is formed to be 10 cm x 10 cm, Is manufactured such that the height H is 20 ± 1 cm and the width W is 17 ± 1 cm. The hollow tube 120 is a water surface filled in the water tub 110, That is, the depth L to be immersed in the water from the level indication P for the water-filling guide is set to 10 ± 0.1 cm. The limitation of the immersion depth (L) in the water of the hollow tube 120 to 10 ± 0.1 cm is intended to meet the recommendation of the International Atomic Energy Agency Technical Report (TRS-398).

On the other hand, the size standard of the water tank 110 as described above does not limit the present invention, and the size of the radiation irradiation surface (X to X: X1) output from the radiation generator (refer to 10 in Figs. 6 and 7) The size standard can be produced in a proportionally modified size.

The hollow tube 120 serves as an outer case having both ends opened so that the radiation dose measuring device 130 can be inserted and detached in a detachable state.

According to an aspect of the present invention, the hollow tube 120 is preferably made of transparent acrylic to form a phantom of a medium closest to the human body.

5 is a photographic view of the phantom device 100 for measuring a radiation dose of the present invention in which the hollow tube 120 is actually made of transparent acrylic. In the case of the hollow tube 120 made of transparent acrylic, it is preferable that a mark M for setting a setting position at which the radiation dose measuring device 130 is inserted is displayed.

According to another aspect of the present invention, the hollow tube 120 may have a configuration in which a light emitting portion for confirming whether the radiation dose measuring device 130 is embedded is formed in only a part of a section.

According to the present invention, the hollow tube 120 is formed so that the shape and size of the inner diameter of the hollow tube 120 are complementary to each other, so that the hollow tube 120 can be easily inserted according to the outer shape and outer diameter size specifications of the radiation dose measuring device 130 For example, when the radiation dose measuring element 130 is formed in a cylindrical shape, it is formed into a cylindrical cylinder structure.

6, the phantom device 100 for measuring the dose of the radiotherapy apparatus according to the present invention is configured such that when the operator sets the radiation dose by the operator, The amount of radiation output from the radiation generator 10 in a state of being isolated from water filled in the water tub 110 can be measured easily and efficiently.

According to the phantom device 100 for examining the dose of the radiation therapy apparatus according to the present invention having the above-described configuration, it is possible to eliminate the process of heat treatment for reuse of the radiation dose measuring device after reading the existing radiation dose measuring phantom device So that the convenience and efficiency of use can be maximized.

In the meantime, the phantom device 100 for examining a dose of a radiation therapy apparatus according to the present invention includes a pair of inserting holes 130 which are inserted into both sides of a radiation dose measuring device 130 set to be embedded in the hollow tube 120, And may further comprise a rod 140.

The insertion rod 140 functions as a tool for facilitating insertion and removal of the radiation dose measuring device 130 into the hollow tube 120, As shown, to fill the empty space on both sides of the radiation dose measuring device 130 inserted into the hollow tube 120.

The insertion rod 140 is preferably made of transparent acrylic to form a phantom of the medium closest to the human body. The insertion rod 140 may be formed of a transparent acrylic material, It is preferable that the recognition mark 141 is provided.

According to the phantom device 100 for examining a dose of a radiation therapy apparatus according to the present invention having the above-described configuration, as shown in FIG. 7, when the operator inserts the insertion rod 140 in a setting operation for measuring a radiation dose, The radiation dose measuring device 130 can be easily inserted into and removed from the hollow tube 120 so that the radiation dose measuring device 130 can be removed from the radiation generator 10 in a state of being isolated from water filled in the water tank 110 The output amount of radiation can be measured easily and efficiently.

That is, the phantom device 100 for dosing inspection of a radiation therapy apparatus according to the present invention can use water as a medium through a standardized and standardized water tank to enable delivery by courier or postal delivery, while wetting the radiation dose measuring device with water It is possible to greatly improve the convenience and practicality of the setting operation of the phantom device for measuring the radiation dose, thereby minimizing the inspection time for measuring the radiation dose The reproducibility and reliability of the radiation dose measurement can be greatly improved.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that various modifications may be made, and such modifications are intended to fall within the scope of the appended claims.

10: Radiation generator
100: Phantom device for dose examination of radiotherapy apparatus
110: aquarium
111: Handle
120: hollow tube
130: radiation dose measuring element
140: Insertion rod

Claims (7)

A phantom device for a dose examination of a radiation therapy apparatus for measuring an amount of radiation irradiated from a radiation generator,
A water tank filled with water in a container form;
A hollow tube provided in the shape of a bridge for traversing the inner space of the water tank so as to submerge in the water filled in the water tank;
And a glass dosimeter detachably embedded in the hollow tube,
And the amount of radiation output from the radiation generator is measured in a state in which the glass dosimeter is set so as to be isolated from water filled in the water tub. The method according to claim 1,
Wherein the water tank is provided with a level indicator (P) for a water filling guide. 3. The method of claim 2,
In the hollow tube,
And a depth (L) immersed in water from the water surface of the water to be filled up to the level indicator (P) for the water filling guide of the water tank is set to 10 ± 0.1 cm. The method according to claim 1,
Wherein the hollow tube has a transparent portion for confirming whether or not the glass dosimeter is built in the phantom device. 5. The method according to any one of claims 1 to 4,
Further comprising an insertion rod set to be inserted into both sides of the glass dosimeter incorporated in the hollow tube. 6. The method of claim 5,
In the insertion rod,
And a recognition mark for recognizing a state of being embedded in the hollow tube is provided. 6. The method of claim 5,
Wherein the water tank, the hollow tube, and the insertion rod are each made of transparent acrylic.
KR1020160017726A 2016-02-16 2016-02-16 Phantom device for radiation dosimetry KR101820863B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20240029329A (en) 2022-08-26 2024-03-05 한국표준과학연구원 Control system and control method of phantom for radiation dosimetry

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102052915B1 (en) * 2018-05-16 2019-12-06 한림대학교 산학협력단 Phantom apparatus for inspecting medical device and adapter plates inserted thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100961892B1 (en) 2008-06-16 2010-06-09 가톨릭대학교 산학협력단 Phantom for magnetic resonance spectroscopy
KR101303297B1 (en) * 2011-11-28 2013-09-03 한국원자력의학원 Portable phantom apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100961892B1 (en) 2008-06-16 2010-06-09 가톨릭대학교 산학협력단 Phantom for magnetic resonance spectroscopy
KR101303297B1 (en) * 2011-11-28 2013-09-03 한국원자력의학원 Portable phantom apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20240029329A (en) 2022-08-26 2024-03-05 한국표준과학연구원 Control system and control method of phantom for radiation dosimetry

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