Journal article
Medical proton dosimetry using radioluminescence from aluminium oxide crystals attached to optical-fiber cables
Radiation Physics, Radiation Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Radiation Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
The prime objective of this study is to investigate if radioluminescence (RL) from carbon-doped aluminum oxide (Al2O3:C) crystals potentially can be used for absorbed dose-rate measurements during proton radiotherapy. The RL from two separate (2mg) Al2O3:C crystals attached to optical-fiber cables were recorded during irradiations in water in a 175MeV clinical proton beam.
The RL response for low-LET protons in the plateau region of the Bragg curve was found to closely resemble that observed for a clinical 6MV X-ray beam. An identical response was found in the Bragg peak (where the dose-averaged LET is about 4keV/μm) for absorbed doses less than 0.3Gy. For doses in the range of 0.3–3Gy, we observed a significant decrease in luminescence efficiency with LET.
At 3Gy, the luminescence efficiency was about 60% in the Bragg-peak region. The study implies that the RL-signal from Al2O3:C could potentially be suitable for medical proton dosimetry in the 0–0.3Gy range even without any LET-dependent correction factors.
| Language: | English |
|---|---|
| Year: | 2007 |
| Pages: | 466-468 |
| Proceedings: | 10th International Symposium on Radiation Physics |
| ISSN: | 18729576 and 01689002 |
| Types: | Journal article |
| DOI: | 10.1016/j.nima.2007.05.129 |
| ORCIDs: | Andersen, Claus Erik and Jain, Mayank |
Dosimetry, Neutron and Proton Radiation-induced luminescence
