Fiber dosimetry for radiation therapy validation

I. Saxena; G. Jozsef

doi:10.1117/12.784735

13 February 2008 Fiber dosimetry for radiation therapy validation

I. Saxena, G. Jozsef

Proceedings Volume 6852, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VIII; 68520L (2008) https://doi.org/10.1117/12.784735
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

Radiation doses used in radiation therapy are calculated during the course of treatment planning. Cross-validation of calculated dose versus received dose is performed mostly in-vitro and may not represent actual therapy doses. In vivo measurements are at best typically limited to a few surface points. Presently, dose is measured primarily with diodes, thermoluminescent or MOSFET dosimeters. Their outer sizes are in the range of 3 mm, which are unpractical for in vivo internal use, in particular for interstitial or intracavital brachytherapy. In addition, diode and MOSFET sensors are individually tethered to cables and are therefore inconvenient for making multiple point measurements. Feasibility of multiple point radiation dosimetry using luminescent optical fibers for in vivo dosimetry during radiation therapy is described that overcomes these difficulties. The spectral response of a candidate rare-earth doped optical fiber dosimetric probe is reported, having 0.5 rads/cm sensitivity. This sensor capability would enable continuous radiation monitoring of dose and dose rate during therapy at multiple locations along the sensor fiber.

Citation Download Citation

I. Saxena and G. Jozsef "Fiber dosimetry for radiation therapy validation", Proc. SPIE 6852, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VIII, 68520L (13 February 2008); https://doi.org/10.1117/12.784735

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