Radiotherapy plan optimization method and system
A technology for radiotherapy and optimization methods, which is used in radiotherapy, therapy, X-ray/γ-ray/particle irradiation therapy, etc.
Active Publication Date: 2017-05-31
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology
If the dose of some parts of the target area does not meet the prescribed dose requirements or the dose of some parts of the endangered organs to be protected exceeds the limited dose, the radiation therapy plan at this time cannot meet the requirements of the doctor and needs to be adjusted
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[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0022] In radiation therapy, high doses of radiation are required to be delivered to the tumor target area as much as possible to minimize the damage to surrounding organs, so it is necessary to formulate a radiation therapy plan. In order to better control the dose distribution in each organ or target area, the radiation treatment plan is optimized so that the radiation kills tumor cells while sparing surrounding normal tissues as much as possible. The embodiment ...
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The invention relates to the field of radiotherapy, and provides a radiotherapy plan optimization method. The method comprises the following steps: acquiring a dose objective of an area-of-interest, wherein the area-of-interest includes organs-of-interest and tumor-of-interest; establishing an optimization model and conducting optimization; calculating dose distribution in the area-of-interest after conducting optimization; and iteratively implementing the following steps until radiotherapy plan optimization is completed: judging whether the dose distribution in the area-of-interest satisfies the dose objective or not, if so, completing the radiotherapy plan optimization, if not, updating the current optimization model and optimizing the optimization model, and calculating the dose distribution in the area-of-interest after conducting the optimization. The radiotherapy plan optimization method provided by the invention can continuously update the optimization model by adding sampling points, which fail to satisfy the dose objective, to the optimization model, so that a radiotherapy plan satisfying a dose requirement in the area-of-interest is obtained.
Description
technical field [0001] The invention relates to the field of radiation therapy, in particular to a method and system for optimizing a radiation therapy plan. Background technique [0002] Radiation therapy is a method to treat malignant tumors by using radiation such as α, β, γ rays produced by radioactive isotopes and x-rays, electron beams, proton beams and other particle beams produced by various x-ray therapy machines or accelerators. [0003] Due to the high energy of the beam, normal cells are also affected while tumor cells are killed. Radiation therapy is planned in order to minimize damage to normal tissue. In radiotherapy planning, doctors need to give prescriptions and treatment plans, and physicists outline organs and tumor locations, as well as gross tumor volume (Gross TumorVolume, GTV), clinical target volume (Clinical Target volume, CTV) and plan according to the doctor’s prescription. Target areas such as the treatment volume (PlanningTarget Volume, PTV), ...
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Login to View More IPC IPC(8): A61N5/10
CPCA61N5/1031A61N5/1048A61N5/1071A61N2005/1085A61N2005/1092
Inventor 赵轲俊
Owner SHANGHAI UNITED IMAGING HEALTHCARE