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Fig. 2 | Radiation Oncology

Fig. 2

From: Monte Carlo simulations in radiotherapy dosimetry

Fig. 2

a Monte Carlo calculated electron fluence spectra for a 10 MeV broad electron beam at three depths (solid lines: total spectra; dashed lines: primary electrons). b Depth variation of Spencer-Attix (Δ=10 keV) stopping-power ratios, water-to-air, for clinical electron beams as a function of R50. Note the large variation of the electron spectra with depth, resulting in the strong depth dependence of the sw,air values. Adapted from ref. [3]

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