KR100621949B1 - The Calibration System of Radiation Absorbed Dose using Internet - Google Patents

Abstract

The present invention is provided to correct the radiation dose standard emitted by the medical radiation generating apparatus distributed in each hospital by receiving the radiation dose standard value and the standard dose system and the dosimeter by international standard protocol (Protocol) Regarding the radiation dose calibration system using the Internet, the recommendation organization that provides information on the measurement method and procedure of the radiation dose to the Internet, a data communication network based on the World Wide Web (WWW). ; Standards and calibration organizations providing calibration data for the radiation standard dose system and ionization chambers and electrometers in medical institutions; A regulatory agency that provides regulatory and reference data on output radiation doses for medical radiation generators used in domestic medical institutions; A dose calibration site for providing a calibration program for making use of calibration data for the output radiation dose of the medical radiation generating device and stored data on the basis of data provided from the standards, calibration organizations, and regulatory agencies; And at least one individual radiation generating device for accessing the dose calibration site and calibrating the radiation dose based on the calibration program.

Radiation Generator, Dose Calibration, Radiation Dose

Description

The Calibration System of Radiation Absorbed Dose using Internet}

1 is a block diagram showing the configuration of a radiation dose calibration system according to the present invention.

2 is a block diagram of a dose calibration site according to the present invention;

3 is a flow chart of the radiation dose calibration process according to the present invention.

Figure 4 is a radiation dose calibration flow chart according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: Recommendation Body 200: Standard / Calibration Institution

300: regulator 400: dose calibration site

410: database portion 420: selection portion

430: Good faith bridge 450: Data processing department

440: dose comparison unit 460: data output unit

500: individual radiation generator

The present invention relates to a radiation dose calibration system of a radiation generating apparatus, and in particular, reference values and calibration data for the standard radiation measured by the international standard measurement method and the output radiation dose of the medical radiation generating apparatus used in domestic medical institutions Regarding the radiation dose calibration system using the Internet for correcting the output radiation dose of the medical radiation generating apparatus scattered in each hospital based on the radiation dose calibration system of the present invention received from the relevant institution.

Until now, the dosimetry of radiation generators, which have been mainly used in clinical trials, has been performed using standard doses (cobalt-60 gamma rays) calibrated in the air from standards and calibration institutes (Exposure, Calibration factor, and irradiation). Dose-absorption dose (R / rad) Radiation dose was measured based on the air kerma or the exposure dose correction constant for ions in the air to determine the conversion factor and absorbed dose. I am doing the following correction.

Recently, in the case of therapeutic radiation generators used for cancer treatment, the American Association of Physicists in Medicine (AAPM), a dose correction system based on water absorbed dose standards, is used to ensure the accuracy of dose correction. New standard measurement methods such as the TG-51 and the International Atomic Energy Agency (IAEA) TRS-398 have been announced, and the paradigm of radiation dose calibration has shifted from air kerma standards to water absorbed dose standards. Users of radiation generators in each medical institution can check the air kerma of the dosimetry (ion box and electric field) calibrated by Korea Standard Science Institute (KRISS) and Korea Food and Drug Administration (KFDA). Use the calibration constants to measure the radiation dose to the radiation generator and then use an Excel program, either manual or spreadsheet. It is not only inconvenient to use because it is performing dose work using the program, and the programs of individual radiation generators used by medical institutions are different from each other, so that comprehensive data management and statistical processing are difficult.

The present invention was derived to solve the above problems, the user recommended by the recommendation organization to facilitate the use of the standard measurement method recommended by the American Medical Physics Society and the International Atomic Energy Agency in the web-based Internet environment. Graphical user interface to select one of the standard measurement methods to be selected-User interface, various data used for dose measurement, and database of calculation processing programs such as tables and graphic values for all physical variables applied to dose calculation system By reducing the error and error in the dose calculation by automatically calculating the data on the dose system and radiation dose calibration of the individual radiation generating apparatus owned by the user on the Internet using the dose calibration system of the radiation generating apparatus of the present invention, Dose Correctness Not only can the performance be faster, but the comparative analysis and continuous statistical processing of the calibration results of the radiation dose can standardize the standardization and calibration data of the radiation dose calibration system of the radiation generator. Therefore, it is possible to emit optimal radiation for each radiation generating device, so that the most appropriate radiation can be irradiated to patients who need cancer treatment and radiation irradiation, thereby providing a radiation dose calibration system using the Internet to maximize the radiation treatment effect. The purpose is.

A characteristic of the present invention for achieving the above object is the measurement of the radiation dose of the radiation generating device to the Internet (Internet), which is a data communication network based on the World Wide Web (WWW), and Advisory bodies such as the American Society for Medical Physics (AAPM), the International Atomic Energy Agency (IAEA), and the Korean Society for Medical Physics (KSMP), which provide information on relevant procedures; and

Standards and calibration agencies, such as the Korea Research Institute of Standards and Science (KRISS) and the Korea Food and Drug Administration (KFDA), which provide standard dose system and calibration data for radiation generating devices; and

Regulatory bodies such as the KINS, which provide regulatory and reference data on the radiation dose of radiation generating devices; and

The radiation dose calibration of the radiation generating device and various information related to the calibration are provided to the individual radiation generating device based on the data provided from the recommendation body, the standard, calibration organization, and the regulatory body. A dose calibration site that centrally manages the accumulation and calibration data of individual radiation generators; And

In order to calibrate the radiation dose of the radiation generator according to the standard measurement method for radiation dose calibration by accessing the dose calibration site, various data related to the dose calibration of the radiation generator are received from the dose calibration site or the results of dose correction are sent. It consists of one or more individual radiation generating device; If the individual radiation generating device having a plurality of the individual radiation generating device is composed of a network that can operate as a local area network between each other.

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

1 is a block diagram showing the configuration of a radiation dose calibration system according to the present invention.

As shown in FIG.

The present invention relates to an advisory body such as the American Medical Physics (AAPM), the International Atomic Energy Agency (IAEA), and the Korean Medical Physics Society (KAMP), which provides information on methods and procedures for measuring radiation doses;

Standards / calibration bodies 200, such as the Korea Research Institute of Standards and Science (KRISS) to the Korea Food and Drug Administration (KFDA), which provide calibration standard data for the radiation generation device and radiation standard dose system;

A regulatory agency 300, such as the Institute of Nuclear Safety and Technology (KINS), which provides regulation and reference data on output radiation doses for individual radiation generating devices used in domestic medical institutions;

On the basis of the data received from the recommendation body, the standard / calibration body, and the regulatory body, the radiation dose calibration of the individual radiation generating device and various information related to the radiation dose calibration are provided to the individual radiation generating device and the radiation dose A dose calibration site 400 for storing various data related to calibration and for centrally managing data on calibration results of individual radiation generators;

It consists of a plurality of individual radiation generating device 500 for emitting medical high energy photon beam and electron beam to correct the radiation dose of the radiation generating device by the calibration program of the dose calibration site and related calibration data. Medical institutions having a large number of the individual radiation generating apparatus 500 can be mutually calibrated using a local area network (LAN), the radiation dose calibration process according to the present invention through the American Academy of Medical Physics (AAPM) The standard data of the TG-51 and TRS-398 protocols recommended by the International Atomic Energy Agency (IAEA) and the radiation dose calibration methods provided by the standards and calibration agencies are stored in the database of the dose calibration site, If the calibration is necessary, access the dose calibration site online and The radiation dose calibration system consists of receiving data, calibrating the radiation dose of individual radiation generating devices, checking whether it is in compliance with the regulations and standards of the regulatory agency, and then transmitting or storing data on dose calibration results. Medical institutions that have a large number of radiation generating devices can also calibrate the radiation dose of at least one radiation generating device and network it to be able to calibrate itself through the local area network.

For reference, the reference temperature required for calibration for each type of radiation of TG-51 and TRS-398, which are recommended by the recommendation organization 100, the dose measurement point according to the type of reference ion box, the depth of ion box measurement, the quality indicators, and the reference phantom. The main characteristics of the substances are shown in Table 1.

Figure 2 is a block diagram showing the configuration and main functions of the dose correction site 400 according to the present invention, the dose correction site 400 is to store the data on the radiation dose measuring method and procedure of the recommended institution 100 Database for recommendation agencies, standards calibration organization database for storing the standard dose system and calibration related data provided by the standards and calibration organization 200, and regulations for storing data on regulations and standards provided by the regulatory body 300 A database unit 410 comprising a user database for storing a calibration result of the radiation dose based on an institution database and a standard measurement method, and various data exchanged with the medical radiological generator 500;

A selection unit 420 for selecting a standard measurement method suitable for an individual radiation generator based on the data stored in the database unit 410; and

When the standard measurement method is selected by the selection unit, the dose correction unit 430 for inputting various data related to dose correction according to the program procedure to calculate the water absorption dose; and

A dose comparison unit 440 for checking whether the calculation result of the dose correction unit 430 is matched with the water absorption dose of the standard / calibration engine database of the database unit 410; and

A data processing unit 450 performing statistical processing of various data generated at a dose calibration site including dose comparison data of the dose comparing unit 440 and storing the data in the database unit 410; And

And a data output unit 460 for outputting the dose comparison data of the dose comparing unit 440 and the data of the database unit 410 or transmitting the data to the individual radiation generating device.

3 is a flow chart illustrating a radiation dose calibration process of the radiation generating apparatus according to the present invention will be described a preferred water absorption dose derivation process.

First of all, the radiation generating device selects one of the protocols of the American Society of Medical Physics (AAPM) TG-51 or the International Atomic Energy Agency (IAEA) TRS-398 standard measurement method and selects whether the radiation to be calibrated is electron or photon beam. Prepare a Dose Worksheet to calibrate the radiation generator from the dosimetry site.

After selecting the ion box calibrated by the standard institution, read the ion box information from the database, input the measurement conditions such as the calibration data (Chamber data) and the type of radiation to be measured. Read the calibration factor.

Select one of cylindrical type or parallel parallel type whose calibration constant is different according to the type of radiation and energy used.Then, the difference between the standard quality used by the standard organization and the existing quality used by the user Calculate the correction factor of correction. After entering the measured data, the physical correction factors and the water absorption dose at the reference point are automatically calculated. If the calculated result is matched while repeating the calibration process of adjusting the output of the radiation generator until the radiation amount emitted from the radiation generator reaches the desired water absorption dose value at the reference point, the calibration is completed.

In the case of a medical institution that has a large number of radiation generating devices, it may be mutually calibrated with the remaining radiation generating devices based on the operating system of the local area network.

Figure 4 is a flow chart showing the radiation dose calibration method of the radiation dose generation device according to the present invention step by step, individual radiation generator users TG-51 and the International Atomic Energy Agency (IAEA) TRS-398 of the American Academy of Medical Physics (AAPM) After the program selection step (S10) of selecting a desired program from among, whether the type of radiation is a photon beam and an electron beam, water absorption dose calibration constant, measurement conditions, used ion information and energy (Beam Quality), etc. An information input step (S20) is performed to input physical information such as input of basic information necessary for water absorption dose calculation and a measured value of an ion box.

Next, the absorbed dose calculation step (S30) of calculating the absorbed dose value of the water at the reference point by reading the corresponding value by linear interpolation from the data recorded for each basic physical factor, that is, the table and the graph, according to the selected program. After that, the water absorbed dose value is finally converted to the absorbed dose value at the maximum dose depth and then subjected to the automatic conversion step (S40), which is then automatically converted to the absorbed dose value and the standard institution database of the dose calibration site. A comparison step (S50) is performed to compare the absorbed dose value of the standard measurement method stored in the apparatus. If the calibration result of the automatically converted absorbed dose value matches the absorbed dose correction value of the standard measurement method, the calibrated radiation generator is operated. Proceed to the operation application step (S70) to end this step, and if the absorbed dose values do not match, compare again. Fed back to the information and the measurement value input step (S20) and a step (S60) of modifying the properties for.

Through these steps, the individual radiation generator user confirms that the radiation dose calibration of the radiation generator is completed by comparing and analyzing the absorption dose of the high energy photon and electron beams of the radiation generator and the water absorbed dose at the reference point. It will be used for clinical use.

As described above, if the dose calibration system of the radiation generating apparatus of the present invention is applied, the user of the individual radiation generating apparatus can select the standard measurement method recommended by the international recommendation institution to suit the characteristics of the radiation generating apparatus owned by each. By automatically performing online real-time operation according to the procedures and methods recommended by the standard measurement method, it is possible not only to efficiently and conveniently perform dose calibration of radiation generators, but also to ensure accuracy and to calibrate between individual radiation generators. There is an advantage that this is possible.

In addition, it has data storage and data processing functions, based on data from various institutions and data on the results of radiation dose calibration regardless of the type of radiation of the radiation generator. 1) Water absorbed dose according to the type of radiation and ion box Changes in calibration constants, 2) physical calculation factors, ie temperature pressure correction coefficients, ion recombination correction coefficients, polarity effects by type of ion box, and 3) output dose and calibration status for individual medical radiation generators. In addition, the database has the advantage that it is easy to manage the history of the radiation generating device.

Claims (7)

Recommendation bodies such as the American Society for Medical Physics (AAPM), the International Atomic Energy Agency (IAEA), and the Korean Society for Medical Physics (KSMP), which provide information on methods of radiation dose measurement of radiation generating devices and related procedures; Standards / calibration bodies 200, such as the Korea Research Institute of Standards and Science (KRISS) and the Korea Food and Drug Administration (KFDA), which provide calibration data on the radiation standard dose system of the radiation generating device and the ion box / electric machine; A regulatory agency 300, such as the KINS, which provides regulation and reference data on radiation dose of a radiation generating device; Dose calibration that provides a calibration program for the radiation dose of the radiation generator and the calibration program for applying the data provided by the agency, based on the data provided by the advisory, standards, calibration and regulatory bodies. Site 400; A radiation dose calibration system using the Internet, comprising at least one individual radiation generator (500) connected to the dose calibration site and transmitting and receiving radiation dose calibration and various data of the radiation generator by the calibration program. The method of claim 1, The measurement method and procedure provided by the recommendation institution 100 are the standard measurement method TG-51 of the American Academy of Medical Physics (AAPM) to the standard measurement method TRS-398 of the International Atomic Energy Agency (IAEA). Calibration system. The method of claim 1, Radiation standard dose system and calibration data for the ion box / electric machine of the radiation generator provided by the standard and calibration organization are provided from the Korea Research Institute of Standards and Science and the Korea Food and Drug Administration. The method of claim 1, The dose calibration site 400 includes a database unit 410 for storing data exchanged with the recommendation institution 100, the standard and calibration organization 200, the regulatory organization 300, and the individual radiation generating apparatus 500; and A selection unit 420 for selecting a standard measurement method suitable for the individual radiation generating apparatus 500 based on the data stored in the database unit 410; and A dose correction unit 430 for calculating a water absorption dose by inputting various data on dose correction according to a program procedure when a standard measurement method is selected by the selection unit; and A dose comparison unit 440 which compares the calculation result of the dose correction unit 430 with the water absorption dose of a standard calibration database and confirms whether or not it matches; A data processing unit 450 performing statistical processing of various data generated at a dose calibration site including dose comparison data of the dose comparing unit 440 and storing the data in the database unit 410; And A data output unit 460 for outputting dose comparison data of the dose comparing unit 440 and data stored in the database unit 410 or transmitting the data to the individual radiation generating apparatus; Radiation dose calibration system using the Internet, characterized in that it further comprises. The method of claim 4, wherein The database unit 410 includes a recommendation agency DB that stores data on measurement methods and procedures provided by recommendation agencies such as the American Academy of Medical Physics (AAPM), the International Atomic Energy Agency (IAEA), and the Korean Medical Physics Society (KSMP). DB of standard calibration organization that stores various data received from standards and calibration institutes such as Korea Research Institute of Standards and Science (KRISS), Korea Food and Drug Administration (KFDA), and various types of data received from regulators such as KINS Regulatory body DB for storing the data and radiation dose calibration system using the Internet, characterized in that it further comprises a user DB for storing the data sent and received with each individual radiation generator and the data exchanged between the individual radiation generator. The dose calibration step of the radiation generating device is to select a desired dose calibration program from TG-51 of the American Academy of Medical Physics (AAPM) and TRS-398 Dosimetry of the International Atomic Energy Agency (IAEA), the type of radiation. Water absorption dose calculation including physical values such as input of basic information required for water absorption dose calculation such as whether photon beam and electron beam, water absorption dose calibration constant, measurement condition, ion box information and energy used, etc. Inputting calibration information required for the step S20, and absorbed dose calculation for calculating water absorbed dose values at a reference point by reading corresponding values from data contained for each of the basic physical factors according to the selected program, that is, values of tables and graphs In step S30, the absorbed dose value calculated in the absorbed dose calculation step S30 is automatically converted into the absorbed dose value at the maximum dose depth. In the step S40 and comparing the automatically converted absorbed dose value with the absorbed dose value of the standard measurement method (S50), if the comparison result does not match in the comparison step (S50), if the comparison result is corrected and the comparison result is the same, Method for correcting the radiation dose using the Internet, characterized in that to complete the calibration of the radiation dose of the radioactive device and to proceed to the operation step of applying the corrected radiation generator (S70). The method of claim 6, If the comparison results of the absorbed dose calibration values do not match, the correction input step (S60) fed back to the basic information and measured value input step (S20) in order to correct the basic information input and the ion-containing measurement value necessary for the water absorption dose calculation Radiation dose calibration method using the Internet, characterized in that it further comprises.

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