title: [The automatic optimization arithmetic of selecting beam arcs in X-knife radiotherapy planning system].
abstract: In this paper, two new concepts of DR (Dose Repulsion) and DG (Dose Gravitation) are presented with their calculation formulas. For the problem of selecting beam arcs in x-knife radiotherapy Planning system, a mathematics model of constrained optimization has been built. Furthermore, we have produced a feasible project of automatic selecting optimized beam arcs plan using SA (Simulated Annealing) arithmetic based on the distribution of the fields of DR and DG in the reduced phase space.
authors.affiliation: No. 266 Hospital of the PLA, First Military Medical University.
authors.forename: Yin-xiang
authors.initials: YX
authors.lastname: Liu
authors.forename: Shu-xiang
authors.initials: SX
authors.lastname: Li
authors.forename: Qing-wen
authors.initials: QW
authors.lastname: Lu
mesh_terms: D000465:Algorithms; D001932:Brain Neoplasms / Q000532:radiotherapy; D008962:Models, Theoretical; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D020266:Radiotherapy, Conformal / Q000379:methods