Characterization of a reusable PRESAGE® 3D dosimeter

Published

Conference Paper

© 2015 IOP Publishing Ltd. This study investigates a reusable PRESAGE® 3D dosimeter (Presage-RU), which would improve cost-effectiveness and facilitate wider implementation of comprehensive, high resolution 3D dosimetry. Small (1x1x4.5 cm) and large (8 cm diameter, 4.5 cm length) sample dosimeters were irradiated multiple times to characterize dose response (i.e. radiation-induced change in optical density (ΔOD)), optical clearing rate, and dose distribution stability. Presage- RU exhibited an initial dose response sensitivity of 0.0119 ΔOD/(cm-Gy), a reduction in response with subsequent irradiations, and a small, permanent ΔOD (∼1-6% of initial signal) following each irradiation. Dosimeters optically cleared at an exponential rate (average T1/2 24.8±3.6 h), and were effectively cleared after ∼5-8 days. 3D gamma analysis (3%/3mm, 10% dose threshold) of a 4-field box plan applied to the large dosimeter showed good agreement following initial irradiation (96.6% passing), but a reduction in passing rate (89.1% passing) with subsequent irradiation. Further study is warranted to fully assess and quantify the performance of Presage-RU for repeat irradiations.

Full Text

Duke Authors

Cited Authors

  • Juang, T; Adamovics, J; Oldham, M

Published Date

  • January 1, 2015

Published In

Volume / Issue

  • 573 / 1

Electronic International Standard Serial Number (EISSN)

  • 1742-6596

International Standard Serial Number (ISSN)

  • 1742-6588

Digital Object Identifier (DOI)

  • 10.1088/1742-6596/573/1/012039

Citation Source

  • Scopus