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Radiotherapy plan optimization system and device and storage medium

A radiotherapy and planning technology, applied in the field of image processing, can solve the problems of large number of adjustment objects, inability to guarantee very close to the ideal curve, high model complexity, etc.

Pending Publication Date: 2020-11-24
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the first solution above, the sampling point is used as the adjustment unit, the number of adjustment objects is very large, the model complexity is high, and the model is not adjusted based on the optimization strategy, so it cannot be guaranteed that the DVH curve of some ROIs that are focused on will be certain. can be very close to the ideal curve
The second solution, their method is to manually adjust the plan through human experience, so it requires continuous trial and error, which is a cumbersome process. This kind of adjustment model based on the experience of physicists based on rules cannot guarantee its robustness.

Method used

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  • Radiotherapy plan optimization system and device and storage medium
  • Radiotherapy plan optimization system and device and storage medium
  • Radiotherapy plan optimization system and device and storage medium

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Embodiment 1

[0031] figure 1 It is a schematic structural diagram of the radiotherapy plan optimization system provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation of optimizing the radiotherapy plan, such as figure 1 As shown, the system includes: a processor 10 and a storage device 20 .

[0032] Wherein, there may be one or more processors 10, the storage device 20 is used to store instructions, and the processor 10 is used to execute instructions to realize such as figure 2 The steps of the radiotherapy plan optimization method:

[0033] S110. Acquire an ideal dose volume histogram of the region of interest.

[0034] Exemplarily, the region of interest may be a region that needs attention during radiotherapy. For example, it may be a target volume and at least one organ at risk.

[0035] Optionally, the region of interest here is determined according to the default configuration of the system. For example, for thoracic tumors, the syste...

Embodiment 2

[0074] image 3 The flowchart of the method for optimizing the radiotherapy plan performed by the processor 10 provided in Embodiment 2 of the present invention. The embodiment of the present invention can be a variation of the above embodiment. On the basis of the above embodiment, the target area of ​​the target area is added. The index of dose conformity. The embodiment of the present invention may be combined with various optional solutions in the foregoing embodiments. In the embodiment of the present invention, optionally, the method includes: obtaining the target dose conformity degree of the target area, the first optimization includes optimizing the dose conformity degree of the target area, and determining the current dose conformity degree of the target area , the second optimization includes determining the weight corresponding to the dose conformity degree based on the current dose conformity degree and the target dose conformity degree of the target area.

[00...

Embodiment 3

[0110] Figure 4 Schematic diagram of the structure of the radiotherapy plan optimization device provided in Embodiment 3 of the present invention, as shown in Figure 4 As shown, the device includes: an ideal dose volume histogram acquisition module 31 , a current dose volume histogram determination module 32 , a weight determination module 33 and an iteration module 34 .

[0111] Wherein, the ideal dose volume histogram acquisition module 31 is used to acquire the ideal dose volume histogram of the region of interest;

[0112] The current dose volume histogram determination module 32 is configured to perform a first optimization based on the ideal dose volume histogram and the current weight of the region of interest, and determine the current dose volume histogram;

[0113] A weight determination module 33, configured to perform a second optimization based on the ideal dose-volume histogram and the current dose-volume histogram of the region of interest, and determine the ...

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Abstract

The embodiment of the invention discloses a radiotherapy plan optimization system and device and a storage medium. The system comprises one or more processors and a storage device, wherein the storagedevice is used for storing instructions, and the processors are used for executing the instructions to achieve the following steps: a, acquiring an ideal dose volume histogram of a region of interest; b, performing first optimization based on the ideal dose volume histogram and the weight of the current region of interest, and determining a current dose volume histogram; c, performing second optimization based on the ideal dose volume histogram and the current dose volume histogram of the region of interest, determining the weight of the updated region of interest, returning the updated weight of the region of interest to the step b, and sequentially executing the first optimization and the second optimization until a termination condition is met. According to the invention, the weight ofthe current region of interest is automatically and efficiently adjusted to obtain a dose volume histogram curve meeting requirements, and the purpose of optimizing a radiotherapy plan is achieved.

Description

technical field [0001] Embodiments of the present invention relate to image processing technologies, and in particular to a radiotherapy plan optimization system, device and storage medium. Background technique [0002] At present, the number of cancer patients is increasing day by day, and radiotherapy is currently the most commonly used method for direct or adjuvant treatment of cancer. Radiation therapy is a way of using ionizing radiation as a treatment. Its principle is that the energy generated by a large amount of radiation can damage the chromosomes of cells, stop the growth of cells, and eliminate cancer cells that can divide and grow rapidly. [0003] Before radiation therapy, a radiation therapy plan needs to be developed. In the prior art, there is an idea of ​​using an ideal dose volume histogram (Dose volume histogram, DVH) to guide plan adjustment. For example, Masoud Zarepisheh et al. described in their article "A DVH-guided IMRT optimization algorithm for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16H20/40G06N3/04G06F30/27
CPCG16H20/40G06F30/27G06N3/045
Inventor 彭雄峰
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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