An optimization system for intensity modulated radiotherapy

An intensity-modulated radiation therapy and iterative optimization technology, applied in radiation therapy, treatment, etc., can solve the problems of occupying computing device memory, time-consuming, and many constraints, and achieve the effect of small memory occupation and fast optimization speed
CN104645500BActive Publication Date: 2018-08-03SHANGHAI UNITED IMAGING HEALTHCARE
14 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI UNITED IMAGING HEALTHCARE
Publication Date
2018-08-03

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention provides a method and system for optimizing intensity-modulated radiotherapy. The method includes: discretizing the radiation beam and the organ of interest into multiple core beams and multiple voxels respectively, and determining the relationship between multiple core beams and multiple voxels The degree of correlation between multiple pen core bundles and multiple voxels, the current dose distribution and ideal dose distribution of multiple voxels, and the weights of multiple voxels, the weights of multiple pen core bundles are updated to Get the update value of the weight of multiple pen core bundles; calculate the new dose distribution of the planned target area according to the update value of the weight of multiple pen core bundles, if the new dose distribution does not meet the requirements, then re-weight the weight of multiple pen core bundles Updates are made until the new dose distribution for multiple voxels meets the requirements. The present invention can avoid pre-calculating and storing the dosage distribution matrix of the pen core beam, and can also avoid the process of solving equations, and at least has the advantages of fast optimization speed and small memory occupation.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention mainly relates to the technique of intensity-modulated radiotherapy, in particular to an optimization system of intensity-modulated radiotherapy. Background technique

[0002] Intensity Modulated Radiation Therapy (IMRT, Intensity Modulated Radiation Therapy) is a commonly used radiotherapy method, which mainly adjusts and optimizes the dose intensity in the radiation field (beam) to meet the requirements. The optimization of IMRT can be achieved through the optimization of fluence map.

[0003] In the prior art, there are mainly two strategies for flux map optimization: one is to establish an optimization model, using the weight of the discretized pencil beam or beamlet in the flux map as the decision variable, and discretizing the voxel (voxel) weight as the decision variable ) of the difference between the actual dose and the specified dose (such as the weighted sum of squares) is the minimization objective, and the global opt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More