Characterization of a fiberoptic radiotherapy dosimetry probe based on Mg2SiO4:Tb

P. MOLINA; M. PROKIC; J. MARCAZZÓ; M. SANTIAGO

RADIATION MEASUREMENTS

Elsevier B.V.

Lugar: Kidlington, United Kingdom; Año: 2010 vol. 45 p. 78 - 82

1350-4487

In this work the feasibility of using Mg2SiO4:Tb as a fiberoptic radioluminescent (RL)dosimetry probe for real time dosimetry has been investigated for the first time. In particular, thestability of the RL signal after repeated use, the spectrum of the RL emission and the dose-rateresponse curve of a Mg2SiO4:Tb-based fiberoptic probe have been determined. The probe has beenalso used to obtain a percentage dose depth curve in a water phantom and its performance has beencompared to that of a standard ion chamber. Besides, its absolute RL yield has been compared to thatof a RL probe based on the commercial Al2O3:C phosphor.