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Radiation Protection Dosimetry 101:23-26 (2002)
© 2002 Oxford University Press

Optically Stimulated Luminescent Glass Optical Fibre Dosemeter

A. L. Huston, B. L. Justus, P. L. Falkenstein, R. W. Miller, H. Ning and R. Altemus (INVITED)

An optical fibre radiation dosemeter has been developed that utilises optically stimulated luminescence and scintillation to provide independent, remote, real-time dose measurements. The radiation sensitive element consists of a 1 mm long, 0.4 mm diameter piece of copper-ion-doped fused quartz that is attached to a 1 m long length of commercial optical fibre. The dosemeter probe is 0.6 mm in diameter and is flexible enough to be used in standard medical catheters for internal radiation dose measurements. A four-channel dosemeter system has been built and characterised under conditions typical of a radiotherapy environment. The device exhibits a linear response over the range of doses from 0.01 Gy to 10 Gy. The dosemeter responds identically to both electrons and photons in the range from 4 to 20 MV and the calibration was retained to within ±2% over a period of 4 weeks. The fibre dosemeter has been used successfully to verify doses received by three patients receiving radiotherapy treatments.


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