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Akagi, Takashi*; Yamashita, Tomohiro*; Uemoto, Kenji*; Sakaki, Hironao; Demizu, Yusuke*; Fuwa, Nobukazu*
no journal, ,
To develop a real-time two dimensional dosimetry with a scintillation screen. A multidimensional dosimetry system is needed for quality assurance of dose distributions in proton therapy, especially proton therapy with a pencil beam scanning system. An organic scintillation material is often used for the dosimetry systems due to the handleability; however organic scintillators have a poor linearity with respect to the linear energy transfer (LET). Meanwhile, inorganic scintillators have comparably good linearity to the LET; however they are difficult to handle. In this study we employ one of inorganic scintillators, silver- activated zinc sulfide, ZnS(Ag), as a scintillator because of the linearity to the LET.