Woulfe, P,Sullivan, FJ,Lewis, E,O'Keeffe, S,Kalinowski, HJ,Fabris, JL,Bock, WJ

24TH INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS

Plastic optical fibre sensor for in-vivo radiation monitoring during brachytherapy

2015

January

Published

1

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Radiotherapy Brachytherapy optical fibre dosimetry radiation sensor radioluminescence

An optical fibre sensor is presented for applications in real-time in-vivo monitoring of the radiation dose a cancer patient receives during seed implantation in Brachytherapy. The sensor is based on radioluminescence whereby radiation sensitive scintillation material is embedded in the core of a 1mm plastic optical fibre. Three scintillation materials are investigated: thallium-doped caesium iodide (CsI:Tl), terbium-doped gadolinium oxysulphide (Gd2O2S:Tb) and europium-doped lanthanum oxysulphide (La2O2S:Eu). Terbium-doped gadolinium oxysulphide was identified as being the most suitable scintillator and further testing demonstrates its measureable response to different activities of Iodine-125, the radio-active source commonly used in Brachytherapy for treating prostate cancer.

10.1117/12.2195213