Characterization of a Radiochromic Solid Polymer Dosimeter According to its' Composition

摘要

Recently, a novel transparent polymer dosimeter, PRESAGE, has been introduced. Radical initiator and leuco dye are two main parts of this dosimeter influencing its' dose response. To study the effect of a solid polymer dosimeter compositions on its' response to therapeutic radiation, various amounts of a radical initiator and a leuco dye were investigated. The solid polymer was evaluated for its linearity, sensitivity, and stability for various compositions of its' main paerts. It was noted that as the concentration of the radical initiator is increased, its' sensitivity is increasesed while its' stability is decreased. On the other hand, we noted that as the concentration of the leuco dye is increased, its' sensitivity is not changed significantly while its' stability is decreased. For all of the concentrations of the radical initiator and leuco dye used in this tudy, the linearity of the dose response in the applied radiation dose range was good. Based on our results it can be concluded that the PRESAGE continues to represents a significant step forward in the developments towards a truly practical and convenient 3D dosimetry material. The attractiveness of this dosimeter lies in its' insensitivity to atmospheric exposure, radiochromic response sensitivity (absorbing rather than light-scattering), linearity, and lack of requirement for an external container.