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Fig. 3 | Radiation Oncology

Fig. 3

From: Monte Carlo simulations in radiotherapy dosimetry

Fig. 3

a Monte Carlo calculated electron fluence spectra for a 10 MV broad photon 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 photon beams as a function of TPR 20,10. Note the almost constant depth dependence of the electron spectra, resulting in practically depth-independent sw,air values. Adapted from ref. [3]

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