Inorganic scintillation detectors based on Eu-activated phosphors for 192 Ir brachytherapy

The availability of real-time treatment verification during high-dose-rate (HDR) brachytherapy is currently limited. Therefore, we studied the luminescence properties of the widely commercially available scintillators using the inorganic materials Eu-activated phosphors Y 2 O 3 :Eu, YVO 4 :Eu, Y 2 O 2 S:Eu, and Gd 2 O 2 S:Eu to determine whether they could be used to accurately and precisely verify HDR brachytherapy doses in real time. The suitability for HDR brachytherapy of inorganic scintillation detectors (ISDs) based on the 4 Eu-activated phosphors in powder form was determined based on experiments with a 192 Ir HDR brachytherapy source. The scintillation intensities of the phosphors were 16–134 times greater than that of the commonly used organic plastic scintillator BCF-12. High signal intensities were achieved with an optimized packing density of the phosphor mixture and with a shortened fiber-optic...

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