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An algorithm for real-time dosimetry in intensity-modulated radiation therapy using the radioluminescence signal from Al2O3 : C

Andersen, C. E. ; Marckmann, C. J. ; Aznar, M. C. ; Botter-Jensen, L. ; Kjaer-Kristoffersen, F. and Medin, Joakim LU (2006) In Radiation Protection Dosimetry 120(1-4). p.41468-41468
Abstract
Although the radioluminescence (RL) signal from optical fibre Al2O3:C dosemeters used in medical applications is essentially proportional to dose rate, the crystals used so far are imperfect in the sense that their RL sensitivity changes with accumulated dose. A computational algorithm has been developed that corrects for these sensitivity changes. We further report on a new system that effectively separates the RL signal generated in the crystal from fluorescence and Cerenkov emission generated in the optical fibre cable using a gating technique in connection with pulsed linear accelerator radiation beams. The dosimetry system has been used for dose measurements in a phantom during an intensity-modulated radiation therapy (IMRT) treatment... (More)
Although the radioluminescence (RL) signal from optical fibre Al2O3:C dosemeters used in medical applications is essentially proportional to dose rate, the crystals used so far are imperfect in the sense that their RL sensitivity changes with accumulated dose. A computational algorithm has been developed that corrects for these sensitivity changes. We further report on a new system that effectively separates the RL signal generated in the crystal from fluorescence and Cerenkov emission generated in the optical fibre cable using a gating technique in connection with pulsed linear accelerator radiation beams. The dosimetry system has been used for dose measurements in a phantom during an intensity-modulated radiation therapy (IMRT) treatment with 6 MV photons. The RL measurement results are in excellent agreement (i.e. within 1%) with both the OSL results and the dose delivered according to the treatment planning system. RL signals from Al2O3:C can be used for real-time dose rate measurements with a time resolution of similar to 0.1 s and a spatial resolution only limited by the size of the detector (< 0.5 mm). (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Radiation Protection Dosimetry
volume
120
issue
1-4
pages
41468 - 41468
publisher
Oxford University Press
external identifiers
  • wos:000240692000002
  • scopus:33749656846
ISSN
1742-3406
DOI
10.1093/rpd/nci600
language
English
LU publication?
yes
id
ea9781d5-330c-410f-9192-496e903ccd7a (old id 686081)
date added to LUP
2016-04-01 15:54:52
date last changed
2021-09-22 01:56:17
@article{ea9781d5-330c-410f-9192-496e903ccd7a,
  abstract     = {Although the radioluminescence (RL) signal from optical fibre Al2O3:C dosemeters used in medical applications is essentially proportional to dose rate, the crystals used so far are imperfect in the sense that their RL sensitivity changes with accumulated dose. A computational algorithm has been developed that corrects for these sensitivity changes. We further report on a new system that effectively separates the RL signal generated in the crystal from fluorescence and Cerenkov emission generated in the optical fibre cable using a gating technique in connection with pulsed linear accelerator radiation beams. The dosimetry system has been used for dose measurements in a phantom during an intensity-modulated radiation therapy (IMRT) treatment with 6 MV photons. The RL measurement results are in excellent agreement (i.e. within 1%) with both the OSL results and the dose delivered according to the treatment planning system. RL signals from Al2O3:C can be used for real-time dose rate measurements with a time resolution of similar to 0.1 s and a spatial resolution only limited by the size of the detector (&lt; 0.5 mm).},
  author       = {Andersen, C. E. and Marckmann, C. J. and Aznar, M. C. and Botter-Jensen, L. and Kjaer-Kristoffersen, F. and Medin, Joakim},
  issn         = {1742-3406},
  language     = {eng},
  number       = {1-4},
  pages        = {41468--41468},
  publisher    = {Oxford University Press},
  series       = {Radiation Protection Dosimetry},
  title        = {An algorithm for real-time dosimetry in intensity-modulated radiation therapy using the radioluminescence signal from Al2O3 : C},
  url          = {http://dx.doi.org/10.1093/rpd/nci600},
  doi          = {10.1093/rpd/nci600},
  volume       = {120},
  year         = {2006},
}