Low-cost commercial glass beads as dosimeters in radiotherapy

Enhancing the radiation dose detection sensitivity of optical fibres

“…To-date, wide-ranging investigations have been made of the radiation dose detection capability of various types of passive dosimeters DeWerd et al, 2014;Halperin et al, 2014;Jafari et al, 2014;Marcazzó et al, 2013;Page et al, 2014;Pugliesi et al, 2014;Sahare et al, 2014;Salah et al, 2011;Twardak et al, 2014). The type of base material and constituent concentrations are the dominant factors influencing dosimeter performance.…”

Feasibility study of silica bead thermoluminescence detectors (TLDs) in an external radiotherapy dosimetry audit programme

“…Between each use, the beads were subsequently annealed for 1 h at 400 °C and then kept 24 h at room temperature under dark conditions to ensure they were stabilised prior to the next irradiation. A detailed description of the preparation and annealing procedure has previously been published [14].…”

“…Silica beads have previously been characterised as novel high spatial resolution micro TLDs [14,15,16,17,18]. The particular silica beads employed have several potentially favourable physical characteristics as dosimeters in postal dosimetry audit of advanced radiotherapy.…”

γ-Ray induced thermoluminescence characteristics of the PbO–Al2O3–SiO2:Pr3+glass system

“…However, due to its low corrosion resistance this material was replaced by several other non-tissue equivalent amorphous phosphate, aluminosilicate materials [3]. Bradley and his co-workers have carried out extensive investigation on TL emission of a variety of glass materials [4][5][6]. In general in aluminum silicates Al ions participate in the glass network with AlO 4 structural units and there is a possibility for the cross linking (between Al tetrahedra and Si tetrahedra) like Al-O-Si.…”

“…In addition aluminum ions, depending upon their concentration and the composition of the glass matrix, may also participate in the glass network with AlO 5 and AlO 6 structural units. The radiation response of aluminosilicate glass depends upon the relative proportions of AlO 4 and AlO 6 structural fragments in the glass network [7]. Further, the addition of heavy metal oxide like PbO to aluminosilicate systems is expected to change the radiation response properties to a large extent.…”