CN108804834A - Complicated heterogeneous texture scattering nucleus acquisition methods - Google Patents
Complicated heterogeneous texture scattering nucleus acquisition methods Download PDFInfo
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- CN108804834A CN108804834A CN201810614264.4A CN201810614264A CN108804834A CN 108804834 A CN108804834 A CN 108804834A CN 201810614264 A CN201810614264 A CN 201810614264A CN 108804834 A CN108804834 A CN 108804834A
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- energy dispersive
- medium
- heterogeneous texture
- monte carlo
- core
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Abstract
The invention discloses a kind of complicated heterogeneous texture scattering nucleus acquisition methods, include the following steps：S1：Obtain input data：It measures the percent depth-dose curves of radioactive source, radioactive source power spectrum is obtained by inverting；S2：Establish database：Monte Carlo Simulation Model is initially set up, processing is extracted secondly based on the data of spatial symmetry；S3：Establish heterogeneous texture energy dispersive core.The difference that the present invention passes through the energy dispersive core of analysis equal densities different medium, establish the functional relation of the energy dispersive core of equal densities different medium, when calculating complicated heterogeneous texture energy dispersive core, according to the material category of medium and density information and above-mentioned functional relation, obtain complicated heterogeneous texture energy dispersive core, more traditional is solved based on the modified heterogeneous texture energy dispersive core of equivalent electron density, the precision for improving complicated heterogeneous texture energy dispersive core, can be used in the radiotherapies key technology such as Rapid Dose Calculation, dose reconstruction.
Description
Technical field
The present invention relates to the energy dispersive core acquiring technology fields in radiation dose measurement, calculating and reconstruction, especially relate to
And a kind of complicated heterogeneous texture scattering nucleus acquisition methods.
Background technology
Radiation dose measurement, calculating and reconstruction be widely used in environmental protection, radiation chemical engineering, food processing, nuclear technology and
Using fields such as, aerospaces.Wherein, it is dose of radiation calculating/weight to the energy dispersive core by irradiation medium to obtain radioactive source
Critical issue in building.The dosage of ray in the medium in radiative process is quickly and accurately calculated/rebuild, is needed accurate anti-
Reflect radioactive source and the energy dispersive core of dielectric property.
The energy dispersive core of the current widely used small beam of method acquiring unit measured directly, can not fundamentally overcome
Radioactive source equipment appurtenance and the error introduced by the scattered rays of irradiation medium, lead to the precision of energy dispersive core not in measurement process
It is high.And the method for the traditional Monte Carlo simulation extraction scattering nucleus applied before this, need the illiteracy for recording each point in three dimensions
Special Monte Carlo Simulation of Ions Inside can not as a result, the scattering nuclear data file formed is huge, and is difficult for specific radioactive source to establish scattering nucleus yet
Reflect the variation of scattering nucleus during radioactive source is used for a long time.In addition, the existing energy dispersive core obtained with Monte Carlo method
The case where uniform dielectric and simple non-uniform dielectric can only be handled, for the complicated medium above method be required for special equipment and
Operating personnel's operation with professional knowledge, time-consuming and laborious, manpower and materials consumption is big, very inconvenient.
Therefore it is urgent to provide a kind of novel complicated heterogeneous texture scattering nucleus acquisition methods to solve the above problems.
Invention content
Technical problem to be solved by the invention is to provide a kind of complicated heterogeneous texture scattering nucleus acquisition methods, method letters
It is single, the precision of complicated heterogeneous texture energy dispersive core can be improved, the radiotherapies such as Rapid Dose Calculation, dose reconstruction pass is can be used for
In key technology.
In order to solve the above technical problems, one aspect of the present invention is：A kind of complicated heterogeneous texture is provided
Scattering nucleus acquisition methods, include the following steps：
S1：Obtain input data：It measures the percent depth-dose curves of radioactive source, radioactive source power spectrum is obtained by inverting；
S2：Establish database：Monte Carlo Simulation Model is initially set up, is carried secondly based on the data of spatial symmetry
Take processing；
S3：Establish heterogeneous texture energy dispersive core：
By analyzing the difference of the energy dispersive core of equal densities different medium, the energy of equal densities different medium is established
The functional relation of scattering nucleus obtains complicated heterogeneous texture energy dispersive core according to the material category and density information of medium.
In a preferred embodiment of the present invention, in step s 2, the method for establishing Monte Carlo Simulation Model is：
A Single Medium model is established, including cube dielectric model, sphere dielectric model, beam are directly incident on medium
Geometric center on, dielectric material, density and variable dimension；
Fine analog is carried out to above-mentioned model with Monte Carlo method, preserves the total space file of its output.
Further, the beam uses the sequence monoenergetic particles source of different-energy successively, or directly uses radioactive source
Power spectrum.
In a preferred embodiment of the present invention, in step s 2, the data based on spatial symmetry extract processing
Method be：
If the Monte Carlo Simulation Model established is cube medium, in operation Monte Carlo software data extraction program
Afterwards, from the result that Monte Carlo software simulates cube medium, Central axis percent depth dosage PDD and several depth are extracted
Off-axis dosage is distributed OAR；
If the Monte Carlo Simulation Model established is sphere medium, in operation Monte Carlo software data extraction program
Afterwards, the dosage distributed intelligence of different radii different angle is extracted from the result that Monte Carlo software simulates sphere medium.
The beneficial effects of the invention are as follows：
(1) present invention has carried out function using Monte Carlo simulation results to the energy dispersive core of equal densities different medium
Relationship is built and comparative analysis, overcomes and traditional is solved based on the modified heterogeneous texture energy dispersive core of equivalent electron density
Limitation improves the precision of complicated heterogeneous texture energy dispersive core, can be used for the radiotherapies such as Rapid Dose Calculation, dose reconstruction key
In technology；
(2) the method for the present invention is simple, and calculating speed is fast, time saving and energy saving, and radioactive source in measurement process is fundamentally overcome to set
Standby attachment and the error introduced by the scattered rays of irradiation medium, and it is of less demanding to the professional knowledge of operating personnel.
Description of the drawings
Fig. 1 is the flow chart of complicated one preferred embodiment of heterogeneous texture scattering nucleus acquisition methods of the invention.
Specific implementation mode
The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention includes：
A kind of complexity heterogeneous texture scattering nucleus acquisition methods, include the following steps：
S1：Obtain input data：
It measures the percent depth-dose curves of radioactive source, radioactive source power spectrum is obtained by inverting.Preferably, the energy of radioactive source
Spectrum information is obtained by the power spectrum inversion method developed, referring specifically to Patent No. ZL200910116116.0, entitled base
It is described in detail in the patent of invention of more algorithm radioactive source inversion methods.
S2：Establish database：
S2.1：Establish Monte Carlo Simulation Model：
Establish a Single Medium model (such as：Cube, sphere), beam is directly incident in the geometric center of medium, is situated between
Material, density and variable dimension；
Beam uses the sequence monoenergetic particles source of different-energy successively, or directly uses the power spectrum of radioactive source.It is special with covering
Caro method carries out fine analog to above-mentioned model, preserves the total space file of its output；Flow is embodied：Monte Carlo journey
The energy saltation point core Π that sequence (such as subprogram EDKnrc of EGSnrc) obtains：Π is a series of single energy or the light of certain power spectrum
Son be incident on a certain uniform dielectric (such as：Water) in, correspond to the radiation energy value matrix of three-dimensional coordinate (x, y, z), by
The point core acquisition methods of development obtain, referring specifically to Patent No. ZL200910116115.6, a kind of entitled parsing Meng Teka
The patent of invention of sieve dose calculation methodology is described in detail.
S2.2：Data based on spatial symmetry extract processing：
Monte Carlo software data extraction program is run, from the result that Monte Carlo software simulates cube medium, is carried
Take be parallel to directions of rays, cross ray center axis Different Plane on dosage distribution, i.e. Central axis percent depth dosage PDD and
The off-axis dosage of several depth is distributed OAR；Extraction different radii is different from the result that Monte Carlo software simulates sphere medium
The dosage distributed intelligence of angle；
The data of the sequence monoenergetic particles of extraction different-energy successively；The particle data of each energy is stored to respective number
According to file；Or the power spectrum of the radioactive source is directly inputted in Monte Carlo software, extract Monte Carlo simulation results；
S3：Establish heterogeneous texture energy dispersive core：
Step S2, the foundation of all database needed for Method Of Accomplishment are repeated according to different medium；
By analyzing the difference of the energy dispersive core of equal densities different medium, the energy of equal densities different medium is established
The functional relation of scattering nucleus：
F indicates that scattering nucleus, r indicate position vector of the scattering nucleus from starting point to position.
When calculating complicated heterogeneous texture energy dispersive core, according to the material category of medium and density information and above-mentioned function
Relationship obtains complicated heterogeneous texture energy dispersive core, more traditional based on the modified heterogeneous texture energy of equivalent electron density
It measures scattering nucleus to solve, improves the precision of complicated heterogeneous texture energy dispersive core, can be used for the radiation such as Rapid Dose Calculation, dose reconstruction
It treats in key technology.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (4)
1. a kind of complexity heterogeneous texture scattering nucleus acquisition methods, include the following steps：
S1：Obtain input data：It measures the percent depth-dose curves of radioactive source, radioactive source power spectrum is obtained by inverting；
S2：Establish database：Initially set up Monte Carlo Simulation Model, secondly based on spatial symmetry data extract plus
Work；
S3：Establish heterogeneous texture energy dispersive core：
By analyzing the difference of the energy dispersive core of equal densities different medium, the energy dispersive of equal densities different medium is established
The functional relation of core obtains complicated heterogeneous texture energy dispersive core according to the material category and density information of medium.
2. complexity heterogeneous texture scattering nucleus acquisition methods according to claim 1, which is characterized in that in step s 2,
The method for establishing Monte Carlo Simulation Model is：
A Single Medium model is established, beam is directly incident in the geometric center of medium, and dielectric material, density and size can
Become；
Fine analog is carried out to above-mentioned model with Monte Carlo method, preserves the total space file of its output.
3. complexity heterogeneous texture scattering nucleus acquisition methods according to claim 2, which is characterized in that the beam is successively
Using the sequence monoenergetic particles source of different-energy, or directly use the power spectrum of radioactive source.
4. complexity heterogeneous texture scattering nucleus acquisition methods according to claim 1, which is characterized in that in step s 2,
The method that data based on spatial symmetry extract processing is：
If the Monte Carlo Simulation Model established is cube medium, after running Monte Carlo software data extraction program,
From the result that Monte Carlo software simulates cube medium, extract Central axis percent depth dosage PDD and several depth from
Axis dosage is distributed OAR；
If the Monte Carlo Simulation Model established is sphere medium, after running Monte Carlo software data extraction program, from
The dosage distributed intelligence of different radii different angle is extracted in the result of Monte Carlo software simulation sphere medium.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020106054A1 (en) * | 2000-09-22 | 2002-08-08 | Numerix, Llc. | Radiation therapy treatment method |
| CN101477202A (en) * | 2009-01-22 | 2009-07-08 | 中国科学技术大学 | Energy deposition nucleus acquirement method |
| CN104166962A (en) * | 2014-07-29 | 2014-11-26 | 南京邮电大学 | Cone beam CT scattering correction method by use of scattering nucleus method |
-
2018
- 2018-06-14 CN CN201810614264.4A patent/CN108804834A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020106054A1 (en) * | 2000-09-22 | 2002-08-08 | Numerix, Llc. | Radiation therapy treatment method |
| CN101477202A (en) * | 2009-01-22 | 2009-07-08 | 中国科学技术大学 | Energy deposition nucleus acquirement method |
| CN104166962A (en) * | 2014-07-29 | 2014-11-26 | 南京邮电大学 | Cone beam CT scattering correction method by use of scattering nucleus method |
Non-Patent Citations (1)
| Title |
|---|
| 任强: "剂量引导放射治疗中三维剂量重建方法研究", 《中国优秀博硕士学位论文全文数据库(博士)医药卫生科技辑》 * |
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Address after: Room 406, block B, phase I, Zhongdan Ecological Life Science Industrial Park, No. 3-1, xinjinhu Road, Jiangbei new district, Nanjing City, Jiangsu Province Applicant after: Zhongke Chaojing (Nanjing) Technology Co.,Ltd. Address before: 230601 NO.560, Haiheng building, No.6 Cuiwei Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant before: ZHONGKE CHAOJING (ANHUI) TECHNOLOGY Co.,Ltd. |
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