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- W2149602885 abstract "We employ the Monte Carlo method to study a constrained optimization problem — packing hard spheres with unequal radii (r 2 > r 1 ) into a 3D bounded region and discuss its connection with the Gamma Knife radiosurgery treatment planning. Selection of the best fit solution is based on the Boltzmann factor, e -ΔE/T , which allows us to search for the global optimal solution. As an illustration we determined the least number (≤15) of packed spheres that will occupy the largest volume for three different hypothetical tumor sizes (4115, 10 000 and 36 000 voxels). For the bounded regions and the sizes of the packed spheres that we studied here, the optimal volume packing ratio ranges from 41.3 to 48.7%. From our study, using a lower r 2 /r 1 ratio is more desirable due to the ≤15 radiation shots constraint. The optimal volume packing ratio can be obtained within a relative short CPU computing time and could provide a good starting point for the radiosurgery treatment planning." @default.
- W2149602885 created "2016-06-24" @default.
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- W2149602885 date "2003-07-01" @default.
- W2149602885 modified "2023-09-23" @default.
- W2149602885 title "STUDY OF THE UNEQUAL SPHERES PACKING PROBLEM: AN APPLICATION TO RADIOSURGERY TREATMENT" @default.
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- W2149602885 doi "https://doi.org/10.1142/s0129183103004966" @default.
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