title: Radiophotoluminescence dosimetry using a small spherical glass: a preliminary phantom study.
abstract: A radiophotoluminescence dosimetry has been proposed using a spherical silver-activated phosphate glass with a diameter of 1.5 mm. A 6 MV photon dose of 2 Sv (2 Gy) was delivered to 14 spherical glass samples placed between two solid water phantoms at a depth of 10 cm. The samples were positioned within a 20 x 20 mm(2) centred at beam axis to ensure uniform dose absorption. A normalised output from a read-out system was obtained by simultaneously measuring luminescence from a non-irradiated reference and that from an irradiated reference to eliminate background contamination and time-varying fluctuation of the readout system, leading to a normalised standard deviation of 1.8%. A dose up to 3.5 Sv (3.5 Gy) was delivered to three spherical glass samples positioned between two solid water phantoms at a depth of 10 cm. The normalised output increased linearly with the applied dose.
authors.affiliation: Department of Radiology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655, Japan.
authors.forename: Keiichi
authors.initials: K
authors.lastname: Nakagawa
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Yoda
authors.forename: Takashi
authors.initials: T
authors.lastname: Shiraki
authors.forename: Katsutake
authors.initials: K
authors.lastname: Sasaki
authors.forename: Masanori
authors.initials: M
authors.lastname: Miyazawa
authors.forename: Tatsuyo
authors.initials: T
authors.lastname: Ishidoya
authors.forename: Kuni
authors.initials: K
authors.lastname: Ohtomo
authors.forename: Minoru
authors.initials: M
authors.lastname: Hamada
mesh_terms: D008163:Luminescent Measurements; D019047:Phantoms, Imaging; D010775:Photic Stimulation; D011829:Radiation Dosage; D011834:Radiation Monitoring; D012834:Silver / Q000528:radiation effects; D013819:Thermoluminescent Dosimetry
chemical_list: D012834:Silver