PVA-KIゲル線量計の反応メカニズムの解明 (I)

Abstract

Radiation-based cancer treatment has less burden on the human body, and it is expected that demand will further increase in Japan where there are many elderly people. At present, there is a demand for a method to visualize radiation easily in radiation cancer treatment. In this study, K I (potassium iodide) was added to a partially saponified PVA (polyvinyl alcohol, hereinafter referred to as PVA) aqueous solution to develop a gelled PVA-KI gel dosimeter. PVA-KI gels are low cost, easy to make, and reusable, such as being able to re-transparent those that have been colored red by radiation when heated, which are not found in other gel dosimeters. The purpose of this study is to elucidate the reaction mechanism in which PVA-KI gel, which turns red by X-ray irradiation, becomes transparent by heating.