title: Reduction of the limitations for the calculations of shielding effects with Van de Geijn's computer program.
abstract: The possibilities for reducing in Van de Geijn's computer program the original limitations for the size and the position within the field of shielding blocks are explored. New methods are presented which are based on experimental measurements as well as more theoretical approaches, without need for any change in the program itself. Two typical clinical examples are presented and the precision obtained critically investigated.
mesh_terms: D003037:Cobalt Radioisotopes; D003201:Computers; D006801:Humans; D011835:Radiation Protection; D011867:Radioisotope Teletherapy / Q000379:methods; D011878:Radiotherapy / Q000379:methods*
chemical_list: D003037:Cobalt Radioisotopes