Dosimetric characteristics of an improved radiochromic film

摘要: Recently, a new model of radiochromic film has been developed for medical applications to provide higher sensitivity and better uniformity response than existing models (i.e., MD‐55). Dosimetric characteristics including sensitivity, linearity, reproducibility, uniformity, dependence on energy time have studied experimentally. The the films were compared with those MD‐55. For these investigations, two exposed ionizing radiation in dose range from 1–72 Gy, using γ‐rays 60Co teletherapy unit 6‐ 18‐MV x rays linear accelerator. was measured helium–neon laser densitometer. results indicated that improved about 40% greater MD‐55 film. Moreover, found be uniform within 4% only one direction orthogonal nonuniformity up 15%, similar Less 5% megavoltage photon observed Complete dosimetric are presented.