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A dose optimization system

A technology of dose and optimization model, applied in the direction of treatment, radiation therapy, etc., can solve the problems of poor accuracy and generality of optimization results, and achieve the effect of accelerating the convergence speed.

Active Publication Date: 2018-11-06
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the defects in the prior art that the ideal dose-volume histogram cannot be directly executed by radiotherapy equipment, the precision of the optimization result is poor, and the versatility between various treatment modes is poor, the present invention provides a dose optimization method and system

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Embodiment Construction

[0043] The detailed features and advantages of the present invention are described in detail below in the specific embodiments, the content of which is sufficient to enable any person skilled in the art to understand the technical content of the present invention and implement it accordingly, and according to the specification, claims and drawings disclosed in this specification , those skilled in the art can easily understand the related objects and advantages of the present invention.

[0044] The invention proposes a dose optimization method and system. Dose volume histogram (DVH) is used to quantitatively express the three-dimensional distribution information of absorbed dose in a defined volume. Such as figure 1 As shown, the horizontal axis of the histogram is absorbed dose, which can be percentage dose or absolute dose; the vertical axis is volume, which can be percentage volume or absolute volume. An important function of DVH is to help analyze whether a treatment pl...

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Abstract

The invention provides a dosage optimization method and a system. The method comprises the following steps of acquiring a first dosage volume histogram, wherein a first dosage volume histogram is a result of fluxgraph optimization; providing a second optimization model, and taking the first dosage volume histogram as an optimization target so as to optimize a parameter of a second optimization model and acquiring a second dosage volume histogram, wherein if a comparison result of the second dosage volume histogram and the first dosage volume histogram is less than a threshold, optimization is finished; otherwise, the optimization is continued.

Description

technical field [0001] The present invention relates to the optimization of radiotherapy equipment, in particular to the optimization based on the ideal dose volume histogram. Background technique [0002] As a local treatment of tumors, radiotherapy has been constantly seeking to solve a basic problem: how to better deal with the dose relationship between tumor tissue and surrounding normal tissues, so that the tumor can be controlled locally while the surrounding normal tissues and surrounding normal tissues Radiation damage to organs is minimal. Clinical experience has proved that the local control of tumors has a certain relationship with the radiation damage of normal tissues. In most cases, the tumor control rate is directly proportional to normal tissue damage, that is, increasing the local tumor control rate will inevitably cause more damage to normal tissue. Clinical experience has also proved that by improving the irradiation technique and choosing a reasonable t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/00
Inventor 李贵周婧劼
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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