J Med Phys Close
 

Figure 4: TrueBeam® – Measurement setup (a) and computed tomography scanning setup (b). Farmer type FC65-G chamber with IBM dose 1 Electrometer was used for the measurements. Reference reading was taken using a SSD 95 cm for a 10 cm × 10 cm field size by delivering 100 MU. The plastic phantom made of poly methyl methacrylate, at a density of 1.19 g/cm3, used for measurement had the dimensions of 30 W × 60 L × 15 H cm3, with an adaptor plate for FC65-G ionization chamber kept at 5-cm depth

Figure 4: TrueBeam<sup>®</sup> – Measurement setup (a) and computed tomography scanning setup (b). Farmer type FC65-G chamber with IBM dose 1 Electrometer was used for the measurements. Reference reading was taken using a SSD 95 cm for a 10 cm × 10 cm field size by delivering 100 MU. The plastic phantom made of poly methyl methacrylate, at a density of 1.19 g/cm<sup>3</sup>, used for measurement had the dimensions of 30 W × 60 L × 15 H cm<sup>3</sup>, with an adaptor plate for FC65-G ionization chamber kept at 5-cm depth