Radiotherapy planning system, determining device and storage medium

A technology of radiation therapy and planning, applied in the medical field, can solve the problems of endangering the health status of patients' organs at risk and the increase of exposure dose, and achieve the effect of protecting organs at risk and precise treatment

Inactive Publication Date: 2019-03-12
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when the tumor target area is expanded, the entire target area needs to cover the changing range of the tumor. This method requires a physicist to have high clin

Method used

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  • Radiotherapy planning system, determining device and storage medium
  • Radiotherapy planning system, determining device and storage medium

Examples

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Embodiment 1

[0029] figure 1 It is a structural diagram of a method for determining a radiotherapy plan in Embodiment 1 of the present invention. This embodiment of the present invention is applicable to the situation where a radiotherapy plan is determined for the tumor site of a tumor patient. The method is executed by a device for determining a radiotherapy plan. The device It is implemented by software and / or hardware, and is specifically configured in a server or computer device carrying a radiotherapy planning system.

[0030] Such as figure 1 A radiotherapy plan determination method is shown, including:

[0031] S110. Acquire an image sequence distributed over time, where the image sequence includes sampling points at the same position corresponding to the region of interest.

[0032] Wherein, the image sequence is a related image reconstructed after performing a scanning operation on the same area to be scanned within a period of time. Wherein, the area to be scanned may be unde...

Embodiment 2

[0048] figure 2 It is a flow chart of a method for determining a radiotherapy plan in Embodiment 2 of the present invention, which is subdivided and optimized on the basis of the technical solutions of the above-mentioned embodiments.

[0049] Further, the operation "solving the optimization model" is refined as "determining subfield information, and calculating the dose at the sampling point based on the subfield information; if the dose at each sampling point deviates from the target dose is not less than the set threshold, modify the sub-field information, and recalculate the dose at the sampling point until the deviation between the dose at each sampling point and the target dose is less than the set threshold", so as to improve the determination of the radiotherapy plan mechanism. The following is only an example of iteratively solving the optimization model. In each iterative calculation process, the current subfield information is determined, and the dose on the sampl...

Embodiment 3

[0073] image 3 It is a flow chart of a radiotherapy plan determination method in Embodiment 3 of the present invention. The embodiments of the present invention provide a preferred implementation manner based on the technical solutions of the foregoing embodiments.

[0074] Such as image 3 A method for determining a radiotherapy plan is shown, which is applied to a radiotherapy planning system, including:

[0075] S301. Determine a physiological motion cycle, and acquire 4DCT images within the physiological motion cycle.

[0076] S302. Determine the time length corresponding to each static CT image according to the scanning time corresponding to each static CT image in the 4DCT image.

[0077] The time periods corresponding to the static CT images do not intersect with each other, and the cumulative sum of the time lengths of the static CT images is the same as the physiological motion cycle.

[0078]Exemplarily, each static CT corresponds to a different phase of the phy...

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Abstract

The invention discloses a radiotherapy planning system, a determining device and a storage medium. The system includes one or more processors, and a storage device for storing one or more programs; the one or more programs are executed by one or more processors, and the one or more processors perform the following steps: acquiring image sequences distributed with time, wherein the image sequencesincluding sample points corresponding to the same location of an interest region; establishing an optimization model based on the sampling points and the weight of each image in the image sequences; and solving the optimization model to determine the radiation therapy plan. The above technical scheme solves the problem that in the prior art, a tumor target area generates periodic movements due tobreathing, heartbeat, and the like, so that the actual exposure dose of the target area and surrounding endangered organs is different from the target dose, the system provides a more precise radiotherapy plan for the movement target area, facilitates more precise treatment, effectively protects the surrounding endangered organs of the target area, and is suitable for use with most existing radiotherapy equipment that implements radiotherapy plans.

Description

technical field [0001] Embodiments of the present invention relate to the field of medical technology, and in particular, to a radiotherapy planning system, a determining device, and a storage medium. Background technique [0002] Radiation therapy is one of the important methods of tumor treatment. Before radiation therapy, static CT (Computed Tomography, computerized tomography) images of the patient are collected first, and then the radiation therapy plan is determined according to the static CT images of the patient. [0003] During the implementation of radiation treatment plan, the tumor site will move periodically due to breathing, heartbeat and other reasons. In order to enable the moving tumor to reach the prescribed dose, in the prior art, tumor target volume expansion or radiotherapy equipment with gating or target volume tracking functions are usually used to solve the above problems. [0004] However, when the tumor target area is expanded, the entire target ar...

Claims

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Application Information

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IPC IPC(8): A61N5/10
CPCA61N5/1031A61N5/1037
Inventor 赵轲俊
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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