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

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

RADIATION MEASUREMENTS

PERGAMON-ELSEVIER SCIENCE LTD

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, the stability of the RL signal after repeated use, the spectrum of the RL emission and the dose-rate response curve of a Mg2SiO4:Tb-based fiberoptic probe have been determined. The probe has been also used to obtain a percentage dose depth curve in a water phantom and its performance has been compared to that of a standard ion chamber. Besides, its absolute RL yield has been compared to that of an RL probe based on the commercial Al2O3:C phosphor.