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Figure 1: An axial computed tomorgraphy slice of a prostate cancer patient. The PTV was generated from the CTV by a uniform expansion of 5 mm in all directions. PTV: Planning Target Volume, CTV: Clinical Target Volume

Figure 1: An axial computed tomorgraphy slice of a prostate cancer patient. The PTV was generated from the CTV by a uniform expansion of 5 mm in all directions. PTV: Planning Target Volume, CTV: Clinical Target Volume