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.

Flexible sheet with radiophotoluminescence glass beads for remotely monitoring high beta-surface-contamination

“…Glass dosimeters in the shape of a rectangular plate or a rod are generally used for personal dosimetry and environmental monitoring. Also, spherical RPL glass dosimeters have been developed for use in radiotherapy (Nakagawa et al, 2007). Recently, bead-type RPL glass dosimeters, of which diameter is around 0.1 mm, have been successfully developed by means of melting-cooling method (Sato et al, 2013).…”