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• W2898885218 abstract "One of the grand challenges in intensity-modulated radiotherapy (IMRT) planning is to optimize the beam angles in a reasonable computation time. To demonstrate the value of prior knowledge on improving the efficiency of beam angle optimization (BAO) in IMRT, this study proposes a modified genetic algorithm (GA) by incorporating prior knowledge into the evolutionary procedure. In the so-called nowGABAO (kNOWledge guided GA for BAO) approach, two types of prior knowledge are incorporated into the general flowchart of GA: (1) beam angle constraints, which define the angle scopes through which no beam is allowed to pass, and (2) plan templates, which define the most possible beam configurations suitable to the studied case and are used to guide the evolutionary progress of GA. Optimization tasks with different prior knowledge were tested, and the results on two complicated clinical cases at the head-and-neck and lung regions show that suitable defining of angle constraints and plan templates may obviously speedup the optimization. Furthermore, a moderate number of quite bad templates produce negligible influence on the degradation of optimization efficiency. In conclusion, prior knowledge helps improve the beam angle optimization efficiency, and can be suitably incorporated by a GA. It is resistant to the inclusion of bad templates." @default.
• W2898885218 created "2018-11-09" @default.
• W2898885218 creator A5033911461 @default.
• W2898885218 date "2018-11-05" @default.
• W2898885218 modified "2023-09-27" @default.
• W2898885218 title "Prior Knowledge Helps Improve Beam Angle Optimization Efficiency in Radiotherapy Planning" @default.
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• W2898885218 doi "https://doi.org/10.48550/arxiv.1811.01834" @default.
• W2898885218 hasPublicationYear "2018" @default.
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