Advanced Physics for Brachytherapy 2018

Radiochromic films: precision/accuracy

• Ignoring intrinsic E dependence, Dempsey et al. (Med. Phys. 27(10) 2462 2000) reported 1.5-4% agreement of Gafchromic MD-55-2 results around a single Ir-192 source with MC • Chiu-Tsao et al. (Med. Phys. 35, 3787 2008) reported 6.8% (k=1) uncertainty for I-125 dose rate constant determination using EBT1 calibrated using a I-125 seed • Ignoring intrinsic E dependence, Sarfehnia et al. (Med. Phys. 37(4) 1924 2010) reported 1.78% (k=1) uncertainty for dose rate to water determination around a single Ir-192 source using EBT-1