Measurement of Radiation Dose in Radiotherapy using PVA/AgNO3 Composite Film

Abstract

The composite films of PVA/AgNO3 have been prepared using casting technique which after irradiation with γ-ray and receiving doses in the range of 1, 2, 4... 12 and 15 Gy) at entrance and exit beam of a phantom, they showed a color changes from white to light yellow, golden, brown and dark brown. The characterization of films by UV-visible spectroscope showed and absorption peaks at 200 and 410 nm, and the absorption peak increase following the increment of applied radiation dose in a linear form based on the following equations: and for entrance and exit dose respectively, where y refers to the absorption in (au) and x refers to the dose in Gray (Gy) with a correlation coefficient of . And the optical density showed great and significant relation between the dose and optical density in a form of linear proportional relation based on the following equations: and for entrance and exit doses respectively, where y refers to optical density and x refers to the applied dose in Gy.