1. A radiosurgery treatment planning method for simulating radiation treatment of tumorous tissue, comprising the steps of: mapping a volume of tumorous tissue requiring irradiation and other regions to generate a model having a curvature; distinguishing between tumorous tissue regions of said model requiring a predetermined dose of radiation and said other regions requiring less than said predetermined dose of radiation; positioning at least several isocenter points in a distributed manner so that they can be superimposed upon said model of said mapped tumorous tissue requiring irradiation; simulating radiation beams passing through said isocenter points; and determining which regions of said tumorous tissue received said predetermined dose of radiation by identifying first cells formed by crossing simulated radiation beams within said model of said tumorous tissue which, upon said simulating step, received a maximum number of radiation beams passing therethrough.