Radiophotoluminescence dosimetry using a small spherical glass: a preliminary phantom study.
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.
Nakagawa
Keiichi
K
Department of Radiology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655, Japan.
Yoda
Kiyoshi
K
Shiraki
Takashi
T
Sasaki
Katsutake
K
Miyazawa
Masanori
M
Ishidoya
Tatsuyo
T
Ohtomo
Kuni
K
Hamada
Minoru
M
D008163:Luminescent Measurements; D019047:Phantoms, Imaging; D010775:Photic Stimulation; D011829:Radiation Dosage; D011834:Radiation Monitoring; D012834:Silver / Q000528:radiation effects; D013819:Thermoluminescent Dosimetry
D012834:Silver