Effective Doses and Organ Doses per Unit Fluence Calculated for Monoenegetic 0.1 to 100MeV Electrons by the MIRD-5 Phantom

To determine quantities for radiation protection against high-energy electrons, such as those from LINAC, the organ dose equivalents and equivalent doses for the human body were calculated using EGS-4 Monte Carlo simulation code and an MIRD-5 mathematical human phantom. Conversion factors for the incident fluence to the organ dose equivalent, to the effective dose and to the effective dose equivalent for monoenergetic electrons were obtained for AP and PA geometrical irradiation conditions at incident energies from 0.1 to 100MeV. The agreement between the results of the present study of effective doses and those of other studies was acceptable within the statistical uncertainties. At energies lower than 10MeV, the skin sensitive layer was taken into account in some computations. It was found that the effective doses depend on the incident electron energy, beam size, and exposure position of the body.