KR102365068B1 - Patient Specific Quality Assurance Method and System of Radiation Therapy Equipment - Google Patents

Abstract

According to the present invention, a data conversion unit that converts detector data into data according to the open time of the multi-leaf collimator of the radiation therapy equipment (hereinafter referred to as 'LOT data') and a plan for quality control according to the LOT data A dose evaluation method and system for patient quality control of radiation therapy equipment that can calculate dose based on the motion log of the multileaf collimator (MLC) of the radiation therapy equipment, including the planning unit, are disclosed.

Description

{Patient Specific Quality Assurance Method and System of Radiation Therapy Equipment}

The present invention relates to a method and system for dose evaluation for patient quality control of radiation therapy equipment.

In general, delivery quality assurance (DQA) is performed as patient specific quality assurance to check whether the beam is irradiated as planned after treatment plan.

Recently, since the dose distribution calculated by computer is calculated well when the movement of the equipment is reflected as it is, for the convenience of DQA, the beam is irradiated without placing the actual phantom, and the record of the equipment movement is obtained from the log file. So, DQA is performed by computer.

In order to perform log-based DQA, it is important to read the movement of the multileaf collimator (MLC), but consider the MLC movement of the equipment in radiation therapy equipment that currently does not provide a log by the equipment company. Rather, it is simply evaluated based on the MLC designed in the treatment plan.

The present invention is a method and system for dose evaluation for patient quality control of radiation therapy equipment, which receives a detector signal measured when a beam is irradiated from radiation therapy equipment and moves the multileaf collimator (MLC) of the radiation therapy equipment. The purpose of the conversion is to allow the 2nd check QA software to calculate the dose based on the actual MLC motion log of the equipment.

Other objects not specified in the present invention may be additionally considered within the scope that can be easily inferred from the following detailed description and effects thereof.

In order to solve the above problems, the dose evaluation system for patient quality control of the radiation therapy equipment according to an embodiment of the present invention detects the radiation beam irradiated by the radiation irradiator, and stores the detected information as detector data in the server A radiation detector that receives the detector data, and a data conversion unit that converts the detector data into data according to the open time of the multi-leaf collimator of the radiation treatment equipment (hereinafter referred to as 'LOT data') and according to the LOT data Includes a planning department that establishes a plan for quality control.

Here, it further includes a dose evaluation unit for evaluating the dose delivery according to the plan for quality control.

Here, the sensing of the radiation beam irradiated by the radiation irradiator is performed without a phantom.

Here, the radiation detector counts the number of radiation beams irradiated for each projection of the entire radiation beam established in the treatment plan and the number of radiation beams irradiated for each detector array, and stores the counts as detector data.

Here, the radiation detector, the radiation therapy equipment dose evaluation system, characterized in that the storage of the data set in a medical format including the detector data in the server.

Here, the data conversion unit, by performing a calculation using a projection calibration value and a detector array calibration value for the detector data, the radiation treatment equipment dose evaluation system, characterized in that the conversion into LOT data of the radiation treatment equipment.

Here, the data conversion unit estimates the ratio value of the LOT data using the detector data, the matrix for correcting the projection, and the matrix for correcting the detector array, and corrects the projection according to the estimated ratio of the LOT data The projection calibration value and the detector array calibration value, which are elements of a matrix for calibrating a matrix and a detector array, are selected.

Here, the data conversion unit selects a ratio value of the LOT data when close to the LOT data in the preset treatment plan from the estimated ratio value of the LOT data.

Here, the plan establishment unit establishes a plan for quality control according to the selected projection calibration value and the detector array calibration value.

The radiation therapy equipment dose evaluation method for patient quality control according to an embodiment of the present invention includes the steps of: a radiation detector detects an irradiated radiation beam, and stores the sensed information as detector data in a server; a data converter is the detector receiving data, converting the detector data into data according to the open time of the multi-leaf collimator of the radiation therapy equipment (hereinafter referred to as 'LOT data') and the planning unit making a plan for quality control according to the LOT data including the steps of establishing

Here, the dose evaluation unit further comprises the step of evaluating the delivery of the dose according to the plan for quality control.

Here, the step of detecting the radiation beam irradiated by the radiation detector and storing the detected information as detector data in the server includes the number of radiation beams irradiated for each projection of the entire radiation beam established in the treatment plan and the detector array The number of irradiated radiation beams is counted for each and stored as detector data.

Here, the converting of the detector data into LOT data includes performing calculations using a projection calibration value and a detector array calibration value on the detector data to convert the detector data into LOT data of the radiation therapy equipment.

Here, the converting of the detector data to the LOT data includes estimating a ratio value of the LOT data using the detector data, a matrix for correcting projection, and a matrix for correcting a detector array, and the estimated ratio value of the LOT data The projection calibration value and the detector array calibration value, which are elements of the matrix for correcting the projection and the matrix for correcting the detector array, are selected according to .

Here, the step of establishing a plan for quality control according to the LOT data establishes a plan for quality control according to the selected projection calibration value and detector array calibration value.

As described above, according to the embodiments of the present invention, a detector signal measured when irradiating a beam from a radiation treatment equipment is received and converted into a movement of a multileaf collimator (MLC) of the radiation treatment equipment, Again, the dose can be calculated based on the actual MLC movement of the equipment through the 2nd check QA software.

Even if it is an effect not explicitly mentioned herein, the effects described in the following specification expected by the technical features of the present invention and their potential effects are treated as if they were described in the specification of the present invention.

1 is a diagram illustrating a dose evaluation system for patient quality control of a radiation therapy equipment according to an embodiment of the present invention.
2 is a view for explaining a process of performing a dose delivery quality assurance (DQA) of the radiation treatment equipment for patient quality control dose evaluation system according to an embodiment of the present invention.
3 is a diagram illustrating the detector data of the radiation treatment equipment for patient quality control according to an embodiment of the present invention, as an example.
4 and 5 are flow charts showing a method for evaluating the dose for patient quality control of the radiation therapy equipment according to an embodiment of the present invention.
Figure 6 shows an example of a treatment planning program of the radiation treatment equipment for patient quality control dose evaluation system according to an embodiment of the present invention.
7 is a diagram illustrating LOT data of a dose evaluation system for patient quality control of radiation therapy equipment according to an embodiment of the present invention as an example.
8 is a view for explaining a normalization method of the radiation treatment equipment for patient quality control dose evaluation system according to an embodiment of the present invention.
9 is a diagram illustrating a DICOM Set of a radiation therapy equipment dose evaluation system for quality control of a patient according to an embodiment of the present invention as an example.
10 is an example of the calculation result of the radiation treatment equipment for patient quality control dose evaluation system according to an embodiment of the present invention.

Hereinafter, with reference to the drawings, the dose evaluation method and system for patient quality control of the radiation therapy equipment related to the present invention will be described in more detail. However, the present invention may be embodied in various different forms, and is not limited to the described embodiments. In addition, in order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals in the drawings indicate the same members.

The suffixes "module" and "part" for components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have distinct meanings or roles by themselves.

The present invention relates to a method and system for dose evaluation for patient quality control of radiation therapy equipment.

1 is a diagram showing a dose evaluation system for patient quality control of the radiation therapy equipment according to an embodiment of the present invention.

Referring to Figure 1, the radiation treatment equipment according to an embodiment of the present invention, the dose evaluation system for patient quality control 10 is a radiation irradiator 100, a radiation detector 200, a data conversion unit 300, planning It includes a unit 400 and a dose evaluation unit 500 .

The dose evaluation system for patient quality control of the radiation therapy equipment according to an embodiment of the present invention 10 is a dose delivery quality control for each patient in order to check whether the beam is irradiated as planned after the treatment plan. It is a system that performs (delivery quality assurance; DQA).

Recently, since the dose distribution calculated by computer is calculated well when the movement of the equipment is reflected as it is, for the convenience of DQA, the beam is irradiated without placing the actual phantom, and the record of the equipment movement is obtained from the log file. So, DQA is performed by computer.

In order to perform such log-based DQA, it is important to read the movement of a multileaf collimator (MLC), but treatment equipment that does not currently provide a log from a treatment equipment company (eg, Helical tomotherapy) ), the dose is evaluated using only the MLC designed in the treatment plan without considering the MLC movement.

Dose evaluation system 10 for patient quality control of radiation therapy equipment according to an embodiment of the present invention receives a detector signal measured when irradiating a beam from radiation therapy equipment and receives a multileaf collimator (Multileaf collimator) of radiation therapy equipment ; MLC) movement, and this again can be used to calculate the dose based on the actual MLC movement of the equipment through the 2nd check QA software.

Dose evaluation system 10 for patient quality control of radiation therapy equipment according to an embodiment of the present invention is preferably performed in equipment that does not acquire LOG. For example, it is applied to radiation therapy equipment (helical tomotherapy) that currently does not provide a log by an equipment company, making it possible to perform log-based DQA.

The radiation irradiator 100 irradiates a radiation beam according to a preset treatment plan.

As shown in FIG. 1 , irradiating a radiation beam according to a preset treatment plan is performed without a phantom. In this step, the beam is irradiated as it is without placing the DQA-only phantom that is generally used.

The radiation detector 200 detects the irradiated radiation beam, and stores the detected information as detector data in the server.

When the radiation therapy equipment 11 irradiates the DQA beam, the number of irradiated beams can be counted for each projection of the entire beam established in the treatment plan.

The number of beams collected by the radiation detector is closely related to the Jaw size of the treatment and the time the MLC is open (Leaf open time, LOT).

Among the information obtainable from the equipment, the one that has the greatest influence on the actual treatment is the equipment called binary multi-leap collimators (MLC) inside the radiation therapy equipment.

The actual beam is irradiated depends on how many seconds this MLC has been opened, that is, depending on the Leap open time (LOT).

The equipment company considers a large error in MLC to be an equipment error and treatment is stopped, but a small difference is judged not to be an equipment error and treatment proceeds.

However, due to these differences, the dose in the treatment planning stage and the actual treatment dose may be different, and the DQA process is performed to analyze it.

The count information of the beam collected for each detector array and each projection is stored in the server of the equipment in the form of a medical format.

Here, in an embodiment of the present invention, DICOM Recorded is applied in the form of a medical format, but it is possible that the detector data is output in the form of another format.

The radiation detector 200 counts the number of radiation beams irradiated for each projection of the entire radiation beam established in the treatment plan and the number of radiation beams irradiated for each detector array, and stores the counts as detector data.

The radiation detector 200 stores a dataset in a medical format including the detector data in the server.

The data conversion unit 300 receives the detector data and converts the detector data into data according to the open time of the multi-leaf collimator of the radiation therapy equipment (hereinafter referred to as 'LOT data').

That is, according to the opening time of the multileaf collimator, the movement of the multileaf collimator (MLC) is read to obtain log-based data.

The data conversion unit 300 performs a calculation using a projection calibration value and a detector array calibration value for the detector data, and converts it into LOT data of the radiation therapy equipment.

Specifically, a matrix and detector array for estimating a ratio value of LOT data using the detector data, a matrix for correcting projection, and a matrix for correcting a detector array, and correcting the projection according to the estimated ratio of LOT data The projection calibration value and the detector array calibration value, which are elements of a matrix for correcting , are selected.

From the estimated LOT data ratio value, a ratio value of LOT data in the case of close to the LOT data in the preset treatment plan is selected.

Specifically, it will be described in detail with reference to FIG. 8 below.

The plan establishment unit 400 establishes a plan for quality control according to the LOT data.

The planning unit 400 establishes a plan for quality control according to the selected projection calibration value and detector array calibration value.

Specifically, to perform DQA, a new DQA DICOM plan is changed based on the calculated LOT value, and the DQA plan is changed to be distinguished from the existing plan.

At this time, the previously calculated LOT is changed and saved as “Tomo Projection Sinogram Data” in the RT-Plan DICOM file produced in the actual treatment planning stage.

The dose evaluation unit 500 evaluates the dose delivery according to the plan for quality control.

The planning unit 400 and the dose evaluation unit 500 according to an embodiment of the present invention may consider the MLC movement of the equipment as log-based DQA software.

A method for evaluating the dose for patient quality control of the radiation therapy equipment according to an embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5 below.

2 is a view for explaining a process of performing a dose delivery quality assurance (DQA) of the radiation treatment equipment for patient quality control dose evaluation system according to an embodiment of the present invention.

Looking at the process of treating a patient in radiation therapy, the internal anatomy and tumor of the patient are photographed through CT simulation, the radiation treatment plan system calculates how to perform radiation therapy on the patient's CT image, and the planned treatment Delivery QA is performed using the phantom to check whether the method fits the patient well, and if the DQA result is pass, the actual treatment begins.

Recently, the dose distribution calculated by computer is calculated well when the movement of the equipment is reflected as it is, so for the convenience of DQA, the beam is irradiated without placing the actual phantom, and then the record of the equipment movement is obtained from the log file to obtain the DQA. A so-called Phantomless DQA procedure performed by a computer is becoming a flow in the DQA field.

If the vendor does not provide a separate method to receive the log file from the device, it is difficult to perform Phantomless DQA.

Since several calculation tools simply cannot reflect the movement of the equipment, it is used only for the purpose of a second check (e.g., Mobius3D) that simply checks whether the treatment plan is successful.

The radiation therapy equipment receiving the DICOM RT-Record type detector signal measured when the radiation therapy equipment irradiates a beam, and the radiation therapy equipment dose evaluation system 10 for quality control of the radiation therapy equipment according to an embodiment of the present invention It converts the movement of the multileaf collimator (MLC) of

According to the present invention, here, the DICOM-RT Record is for explaining one embodiment according to the radiation equipment, and the detector data may be output in other forms.

3 is a diagram illustrating the detector data of the radiation treatment equipment for patient quality control according to an embodiment of the present invention, as an example.

The radiation detector 200 counts the number of radiation beams irradiated for each projection of the entire radiation beam established in the treatment plan and the number of radiation beams irradiated for each detector array, and stores the counts as detector data.

The radiation detector 200 stores a dataset in a medical format including the detector data in the server.

It provides a function to transmit the data collected from the radiation detector to a specific DICOM storage server using the treatment planning software (e.g., Accury Precision).

Detector data is generally stored in the form of DICOM Record and can be exported by the user, and when the inside is checked, the count value collected in the detector is stored in the form of a sonogram as shown in FIG. there is.

In a sonogram, the horizontal axis represents the detector channel and the vertical axis represents the projection angle. For one projection, a sine wave-shaped curve along the vertical axis can be simply represented, and all the data values collected through the projection are collected to form a sinogram. Accordingly, data can be analyzed using the sinogram.

4 and 5 are flowcharts illustrating a method for evaluating a dose for patient quality control of a radiation therapy equipment according to an embodiment of the present invention.

Referring to FIG. 4 , in the method for assessing the dose for patient quality control of radiation therapy equipment according to an embodiment of the present invention, in step S100, a radiation detector detects an irradiated radiation beam, and the detected information is converted to a server as detector data. save to

Detecting the radiation beam irradiated by the radiation detector, and storing the detected information as detector data in the server (S100) includes the number of radiation beams irradiated for each projection of the entire radiation beam established in the treatment plan and the detector The number of radiation beams irradiated for each array is counted and stored as detector data.

In step S200, the data converter receives the detector data, and converts the detector data into data according to the open time of the multi-leaf collimator of the radiation therapy equipment (hereinafter referred to as 'LOT data').

In the step of converting the detector data into LOT data (S200), a calculation using a projection calibration value and a detector array calibration value for the detector data is performed to convert the detector data into LOT data of the radiation treatment equipment.

Here, the detector data, a matrix for correcting the projection, and a matrix for correcting the detector array are used to estimate a ratio value of the LOT data, and a matrix and a detector array for correcting the projection according to the estimated ratio value of the LOT data The projection calibration value and the detector array calibration value, which are elements of the matrix to be corrected, are selected.

In step S300, the planning unit establishes a plan for quality control according to the LOT data.

The step of establishing a plan for quality control according to the LOT data (S300) establishes a plan for quality control according to the selected projection calibration value and detector array calibration value.

In step S400, the dose evaluation unit evaluates the dose delivery according to the plan for quality control.

Specifically, referring to FIG. 5 , the method for assessing the dose for quality control of the radiation therapy equipment for the patient according to an embodiment of the present invention can be performed up to the actual patient's DQA using collectable detector data.

Referring to Figure 5, the radiation therapy equipment according to an embodiment of the present invention, the radiation therapy equipment dose evaluation method for quality control, specifically, in step S100, the radiation detector detects the irradiated radiation beam, and the detected information is the detector data stored on the server as

In step S110, DQA is performed without a phantom. In this step, the beam is irradiated as it is without placing the DQA-only phantom that is generally used.

When the radiation therapy equipment 11 irradiates the DQA beam, the number of irradiated beams can be counted for each projection of the entire beam established in the treatment plan.

In step S120, the DICOM dataset (DICOM image, DICOM-RT Plan, DICOM-RT Structure, DICOM-RT Dose) including the detector data stored in the treatment plan program is transmitted to the developed system.

Here, the count information of the beams collected for each detector array and each projection is stored in the server of the equipment in the form of DICOM Recorded.

According to the present invention, here, the DICOM-RT Record is for explaining one embodiment according to the radiation equipment, and the detector data may be output in other forms.

In step S210, the received detector data is processed and changed to leaf open time (LOT). The number of beams collected by the radiation detector is closely related to the Jaw size of the treatment and the time the MLC is open (Leaf open time, LOT).

Among the information that can be obtained from the equipment, the one that has the most influence on the actual treatment is the equipment called binary multi leap collimators (MLC) inside the radiation therapy equipment.

The actual beam is irradiated depends on how many seconds this MLC has been opened, that is, depending on the Leap open time (LOT).

Here, the data conversion unit 300 receives the detector data and converts the detector data into data (hereinafter, referred to as 'LOT data') according to the open time of the multi-leaf collimator of the radiation therapy equipment.

That is, according to the opening time of the multileaf collimator, the movement of the multileaf collimator (MLC) is read to obtain log-based data.

In step S310, the DICOM-RT plan based on the generated LOT is changed.

The plan establishment unit 400 establishes a plan for quality control according to the LOT data.

Specifically, to perform DQA, a new DQA DICOM plan is changed based on the calculated LOT value, and the DQA plan is changed to be distinguished from the existing plan.

At this time, the previously calculated LOT is changed and saved as “Tomo Projection Sinogram Data” in the RT-Plan DICOM file produced in the actual treatment planning stage.

In step S320, after changing to DICOM Set for DQA, transmit the Dicom Set to Second check QA Software that can calculate the Tomotherapy plan.

In step S410, DQA is calculated. Here, the dose evaluation unit 500 evaluates the dose delivery according to the plan for quality control.

According to an embodiment of the present invention, MLC movement of equipment may be considered as log-based DQA software.

Figure 6 shows an example of a treatment planning program of the radiation treatment equipment for patient quality control dose evaluation system according to an embodiment of the present invention.

DICOM including the number of DQA beam counts measured by the detector can be transferred from each treatment plan program (e.g., Accury Precision) to another DICOM storage server.

The system proposed in the present invention includes a DICOM storage serve to receive this information. That is, the radiation detector detects the irradiated radiation beam, and stores the detected information as detector data in the server.

7 is a diagram illustrating LOT data of a dose evaluation system for patient quality control of radiation therapy equipment according to an embodiment of the present invention as an example.

7 (a) is a Planned LOT, (b) is Detector Data, (c) is Converted LOT from Detector Data, (d) is a Normalized Difference between (a) and (c).

The LOT of MLC established at the time of treatment plan is generated in the form of a sinogram as shown in FIG.

The number of beam counts per projection and detector array that can be obtained from DICOM Record is also obtained in the form of a sinogram as shown in FIG. 7 (b) above, (b) of FIG. should be changed to form.

In the case of (b) of FIG. 7 , the number of beams counted by the detector is related to the actual MLC, but so-called noise may be generated because the beams are scattered.

In addition, it can be seen that the number of beam counts varies for each projection, because the so-called TomoEDEG Dynamic Jaws technology, which changes the size of the jaw for each projection, actually reduces the number of beams that are actually collected in the detector.

Also, the efficiency at which the beam is collected for each Detector Array column may be different.

8 is a view for explaining a normalization method of the radiation treatment equipment for patient quality control dose evaluation system according to an embodiment of the present invention.

In an embodiment of the present invention, in the normalization method, the data converter receives detector data, and converts the detector data into data according to the open time of the multi-leaf collimator of the radiation therapy equipment (hereinafter referred to as 'LOT data'). is used for

Binary MLC and its open time are correlated with count data collected from the exit detector array. The radiation therapy equipment according to an embodiment of the present invention has an arc-type exit detector array with 512 or more chambers for beam detection on the opposite side of the MLC, and when a leaf is opened in the MLC, the beam fluence ( The amount of particles passing through a unit area for a preset time) may be calculated.

A beam count value per projection is collected from each detector channel and is affected by the LOT, the size of the jaw, and the sensitivity of the detector, as well as the position of the detector and the condition of the surrounding leaves by the scattered beam. .

In the conventional case, correction of detector values for projection and array has been described only as a normalization method using a maximum value.

The normalization method according to an embodiment of the present invention uses a method of finding an optimal ratio between two calibrations of a projection calibration value and a detector array calibration value, rather than simply normalizing the maximum value.

In general, the deconvolution detector count value can be changed to LOT by projection and array calibrations (projection calibration ( _CP ) and detector array calibration ( _CA ), respectively), and is expressed by Equation 1.

Here, D is the detector count, C _P is the projection calibration value according to the field size, C _A is the array calibration value, and L is the LOT value.

In connection with the signal normalization procedure according to an embodiment of the present invention, in order to correct the total number of counts of the detector due to the jaw size and the detector sensitivity, the correction factor for the projection _CP and each leaf ( Each of the correction coefficients for leaf) C _L is implemented, and L, which is the measured LOT, can be calculated using Equation (2).

Here, C _A in Equation 1 corresponds to C _L in Equation 2 .

Here, c ₁ and c ₂ are normalization constants considering the maximum leaf open time (LOT) and background noise.

For example, since there is 2x2 mapping detector data and c ₂ can be ignored, P in Equation 1 can be obtained by using c ₁ in Equation 2.

Specifically, the mathematical expression for correcting the detector values for the projection and detector arrays using the Hadamard product for each array is as shown in Equation (3).

When solved as shown in Equation 4, the ratio value of the LOT estimated from the detector is the Hadamard product of the detector data (detData in the above equation) is the projection correction matrix (calFactor_Projection) and the detectorarray correction matrix (calFactor_Array) can be calculated as

Equation 4 is specifically implemented as Equation 5 using c ₁ and c ₂ .

Here, C _P and C _L can be estimated using the planned LOT L′ instead of measuring LOT L, as shown in Equation 6.

Then, for all detector data, iteratively until ΔCP and ΔCL are less than 0.01%, and then estimate c ₁ and c ₂ by minimizing the difference between the measured LOT L and the planned LOT L′.

Accordingly, the P value having the smallest root mean square error between the LOT and the planned LOT calculated in Equation 7 may be calculated.

As shown in Equation 7, estimating the ratio value of the LOT data using the detector data, the matrix for correcting the projection, and the matrix for correcting the detector array, and correcting the projection according to the estimated ratio of the LOT data The projection calibration value and the detector array calibration value, which are elements of a matrix for calibrating a matrix and a detector array, are selected.

Since the optimal values of C _P and C _A are mutually influencing values, iteration was performed using the above formula, and then the values obtained when the two values converge were taken.

Since the P value that determines the absolute LOT is a value that varies depending on the dynamic jaw size, MLC position of the plan, LOT of MLC, and the state of the detector, even if the same energy and the same MLC are investigated. The P value was extracted. To extract, the P value with the smallest root mean square error between the calculated LOT and the planned LOT is calculated.

9 is a diagram illustrating a DICOM Set of a radiation therapy equipment dose evaluation system for quality control of a patient according to an embodiment of the present invention as an example.

The DICOM Set of FIG. 9 includes a CT image, an RT structure, a Modified RT Plan, and an RT Dose.

The DICOM Set newly created in the system is transmitted to the program (e.g., Mobius3D) that can calculate the dose through the export function.

In the preceding process, when data is received from the DICOM storage server of the developed system, it automatically processes from LOT change to transmission to the designated calculation server automatically.

10 is an example of the calculation result of the radiation treatment equipment for patient quality control dose evaluation system according to an embodiment of the present invention.

10 shows the results calculated through Mobius3D after transmitting the values received by the detector to the system for two plans as an embodiment. Through this result, it can be confirmed that the DQA DICOM set created through this system was successfully transmitted and the calculation proceeded well.

The above description is only one embodiment of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to implement it in a modified form without departing from the essential characteristics of the present invention. Therefore, the scope of the present invention is not limited to the above-described embodiments, and should be construed to include various embodiments within the scope equivalent to the content described in the claims.

Claims (15)

In the radiation therapy equipment dose evaluation system,
a radiation detector that detects the radiation beam irradiated by the radiation irradiator and stores the sensed information as detector data in the server;
a data conversion unit that receives the detector data and converts the detector data into data according to the open time of the multi-leaf collimator of the radiation therapy equipment (hereinafter referred to as 'LOT data'); and
Dose evaluation system of radiation therapy equipment comprising a; plan establishment unit to establish a plan for quality control according to the LOT data. According to claim 1,
Dose evaluation system for radiation therapy equipment, characterized in that it further comprises; a dose evaluation unit for evaluating the dose delivery according to the quality control plan. According to claim 1,
Sensing the radiation beam irradiated by the radiation irradiator, the dose evaluation system of the radiation therapy equipment, characterized in that performed without a human body model (Phantom). According to claim 1,
The radiation detector counts the number of radiation beams irradiated for each projection of the entire radiation beam established in a preset treatment plan and the number of radiation beams irradiated for each detector array Radiation therapy equipment, characterized in that it is stored as detector data of the Dose Assessment System. According to claim 1,
The radiation detector, the radiation therapy equipment dose evaluation system, characterized in that for storing a dataset in a medical format including the detector data in the server. 5. The method of claim 4,
The data conversion unit,
Dose evaluation system for radiation therapy equipment, characterized in that the conversion into LOT data of the radiation therapy equipment by performing a calculation using the projection calibration value and the detector array calibration value in the detector data. 7. The method of claim 6,
The data conversion unit,
estimating a ratio value of LOT data using the detector data, a matrix for correcting projection, and a matrix for correcting a detector array,
Dose evaluation system of radiation therapy equipment, characterized in that the projection calibration value and detector array calibration value, which are elements of a matrix for correcting the projection and a matrix for correcting the detector array, are selected according to the estimated ratio value of the LOT data. 8. The method of claim 7,
The data conversion unit,
Dose evaluation system for radiation therapy equipment, characterized in that selecting a ratio value of LOT data when close to LOT data in the preset treatment plan from the estimated ratio value of LOT data. 8. The method of claim 7,
The plan establishing unit, the radiation therapy equipment dose evaluation system, characterized in that the establishment of a plan for quality control according to the selected projection calibration value and detector array calibration value. In the method for evaluating the dose of radiation therapy equipment,
A radiation detector detecting the irradiated radiation beam, and storing the detected information as detector data in a server;
receiving the detector data by a data conversion unit, and converting the detector data into data according to an open time of a multi-leaf collimator of the radiation therapy equipment (hereinafter referred to as 'LOT data'); and
Dose evaluation method of radiation therapy equipment comprising a; the plan establishing unit establishing a plan for quality control according to the LOT data. 11. The method of claim 10,
Dose evaluation method of radiation therapy equipment comprising a; the dose evaluation unit evaluating the dose delivery according to the quality control plan. 11. The method of claim 10,
The step of detecting the radiation beam irradiated by the radiation detector and storing the detected information as detector data in the server includes the number of radiation beams irradiated for each projection of the entire radiation beam established in the preset treatment plan and the detector array Dose evaluation method of radiation therapy equipment, characterized in that by counting the number of radiation beams irradiated for each and storing it as detector data. 11. The method of claim 10,
The step of converting the detector data into LOT data includes:
A method of evaluating a dose of radiation therapy equipment, characterized in that the calculation is performed using a projection calibration value and a detector array calibration value in the detector data and converted into LOT data of the radiation therapy equipment. 14. The method of claim 13,
The step of converting the detector data into LOT data includes:
estimating a ratio value of LOT data using the detector data, a matrix for correcting projection, and a matrix for correcting a detector array,
Dose evaluation method of radiation therapy equipment, characterized in that the projection calibration value and detector array calibration value, which are elements of a matrix for correcting the projection and a matrix for correcting the detector array, are selected according to the estimated ratio value of the LOT data. 15. The method of claim 14,
The step of establishing a plan for quality control according to the LOT data is,
Dose evaluation method of radiation therapy equipment, characterized in that establishing a plan for quality control according to the selected projection calibration value and detector array calibration value.

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