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. 2015 Aug 10;21(2):117–122. doi: 10.1016/j.rpor.2015.07.003

Fig. 5.

Fig. 5

(a) Neutron fluence per Gy components in organs when the photon beam is centred on gonads position and isocenter at 4 cm depth in phantom. Irradiation in standard condition. MCNP4B-GN simulation result. Neutron fluence decreases moving away from gonads position and going deeper in phantom. (b) Thermal neutron equivalent dose at organs when the radiation source is centred on gonads position and isocenter at 4 cm depth in tissue. Irradiation in standard condition. Comparison between BDT measurement and MCNP4B-GN simulation results. Accuracy BDT: 20%.