A radiotherapy plan optimization system for automatically determining the weight of the objective function

Abstract

The invention discloses a radiotherapy scheme optimization system capable of automatically determining the weight of a target function. The radiotherapy scheme optimization system includes an information input module, a pretreatment module, a scheme optimization module, a weight adjustment module, and a scheme optimization result output module; the information input module acquires patient three-dimensional information, organ drawing information, treatment head information, target function information, and DV restricted parameters of organs used in a target function; the pretreatment module calculates dose deposition matrixes of different radiation directions through a dose calculation engine; the scheme optimization module performs scheme optimization through a scheme optimization engine; the weight adjustment module calculates dose distribution of each organ and the value of each sub target function according to input information of the scheme optimization module, and determines if the all the sub target functions meet an optimization ending condition; and the scheme optimization result output module outputs the scheme optimization information. The automatic scheme optimization is an iterative process without inputting an ideal DVH curve.

Description

technical field [0001] The invention belongs to the technical field of radiotherapy plan optimization, and relates to a radiotherapy plan optimization system for automatically determining the weight of an objective function. Background technique [0002] In the process of radiotherapy protocol optimization, the overall objective function of protocol optimization is generally expressed as the sum of the products of each sub-objective function and the corresponding weight. The weights of the sub-objective functions represent the importance of each sub-objective function in the optimization process. Before the scheme optimization, the weight value used by each sub-objective function is pre-set by the physicist based on experience, and the weight value is fixed during the optimization process. After the scheme optimization is completed, the physicist evaluates the quality of the scheme optimization on the optimization results. If the optimization result does not meet the requi...

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Problems solved by technology

However, in general protocol optimization, due to the very large differences between patient anatomy, it is not feasible to use this approximate replacement method

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