Patent ID: 6411675
Filing Date: 2002-06-25
Classification: A61N,G16H,G16Z

Abstract:
A method of radiation treatment planning for flux modulated radiation treatment or flux modulated radiation surgery enabling the production of a desirable radiation dose distribution from a predetermined number and arrangement of pencil beams, said method comprising the steps of:a. calculating the desired doses in each of the voxels of each organ at risk from the results of a preliminary optimization of the planning treatment volume and from desired points in the dose volume distributions for each organ at risk, and b. calculating the optimum fluences for said pencil beams by minimizing an adaptive analytic cost function of the desired dose in the voxels in said planning treatment volume and of said desired doses in each of the voxels in organs at risk by the method of simulated annealing, whereby a therapist can specify the desired dose in the voxels of said planning treatment volume and said desired points in the dose volume distributions for each organ at risk and take advantage of the fast computational possibilities with analytic cost functions for substantial improvements in clinical performance of a treatment planning system.