| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1880578 | Radiation Measurements | 2014 | 6 Pages |
•A 2D dosimetry system based on OSL of Al2O3 was built and demonstrated.•Combination of UV and F-center emission is used for fast readout.•A special algorithm was developed to correct for slow F-center emission.•Potential of measuring 2D dose was demonstrated.•Comparison of dose profile with EBT2 and EDR2 film showed good qualitative agreement.
A laser-scanning 2D dosimetry system based on the Optically Stimulated Luminescence (OSL) signal from Al2O3 films was built and demonstrated. The main challenge of using the OSL from Al2O3 for 2D dosimetry by laser scanning is the long lifetime (∼35 ms) of the main luminescence centers in this material (F-centers). In this work, we demonstrated the possibility of performing 2D dosimetry by laser scanning using a combination of the fast UV emission of F+-centers (lifetime <7 ns) and the slow F-center emission of Al2O3:C, and an algorithm to correct for the slow F-center luminescence lifetime. We also investigated the possibility of using Al2O3:C,Mg, to take advantage of its greater F+-center emission compared to Al2O3:C. Results from 6 MV photon beam irradiations from a clinical linear accelerator were compared to radiographic and radiochromic film profiles showing a good qualitative agreement.
