CW-OSL measurement protocols using optical fibre Al2O3:C dosemeters
| Autor: | Mark S. Akselrod, C. J. Marckmann, Claus E. Andersen, Marianne C. Aznar, Jens Edmund, Lars Bøtter-Jensen |
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| Rok vydání: | 2006 |
| Předmět: |
Photomultiplier
Materials science Optical fiber Optically stimulated luminescence Radiation Dosage Sensitivity and Specificity Signal law.invention Optics law Materials Testing Aluminum Oxide Fiber Optic Technology Computer Simulation Radiology Nuclear Medicine and imaging Optical filter Radiation Radiological and Ultrasound Technology business.industry Public Health Environmental and Occupational Health Reproducibility of Results Dose-Response Relationship Radiation Equipment Design General Medicine Laser Equipment Failure Analysis Models Chemical Continuous wave Thermoluminescent Dosimetry Luminescence business Algorithms |
| Zdroj: | Radiation Protection Dosimetry. 119:368-374 |
| ISSN: | 1742-3406 0144-8420 |
| DOI: | 10.1093/rpd/nci519 |
| Popis: | A new system for in vivo dosimetry during radiotherapy has been introduced. Luminescence signals from a small crystal of carbon-doped aluminium oxide (Al 2 O 3 :C) are transmitted through an optical fibre cable to an instrument that contains optical filters, a photomultiplier tube and a green (532 nm) laser. The prime output is continuous wave optically stimulated luminescence (CW-OSL) used for the measurement of the integrated dose. We demonstrate a measurement protocol with high reproducibility and improved linearity, which is suitable for clinical dosimetry. A crystal-specific minimum pre-dose is necessary for signal stabilisation. Simple background subtraction only partially removes the residual signal present at long integration times. Instead, the measurement protocol separates the decay curve into three individual components and only the fast and medium components were used. |
| Databáze: | OpenAIRE |
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