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. 2009 Dec 4;37(1):154–163. doi: 10.1118/1.3259742

Figure 8.

Figure 8

In‐plane half lateral profiles of single pencil beams at isocenter plane in air for 72.5, 148.8, and 221.8MeV energies. Measurements were performed with a cylindrical ionization chamber (model 31014, PTW‐Freiburg, Freiburg, Germany).