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Definition of parameters for quality assurance of flattening filter free (FFF) photon beams in radiation therapy

Fogliata, A.; Garcia, R.; Knöös, Tommy LU ; Nicolini, G.; Clivio, A.; Vanetti, E.; Khamphan, C. and Cozzi, L. (2012) In Medical Physics 39(10). p.6455-6464
Abstract
Purpose: Flattening filter free (FFF) beams generated by medical linear accelerators have recently started to be used in radiotherapy clinical practice. Such beams present fundamental differences with respect to the standard filter flattened (FF) beams, making the generally used dosimetric parameters and definitions not always viable. The present study will propose possible definitions and suggestions for some dosimetric parameters for use in quality assurance of FFF beams generated by medical linacs in radiotherapy. Methods: The main characteristics of the photon beams have been analyzed using specific data generated by a Varian TrueBeam linac having both FFF and FF beams of 6 and 10 MV energy, respectively. Results: Definitions for dose... (More)
Purpose: Flattening filter free (FFF) beams generated by medical linear accelerators have recently started to be used in radiotherapy clinical practice. Such beams present fundamental differences with respect to the standard filter flattened (FF) beams, making the generally used dosimetric parameters and definitions not always viable. The present study will propose possible definitions and suggestions for some dosimetric parameters for use in quality assurance of FFF beams generated by medical linacs in radiotherapy. Methods: The main characteristics of the photon beams have been analyzed using specific data generated by a Varian TrueBeam linac having both FFF and FF beams of 6 and 10 MV energy, respectively. Results: Definitions for dose profile parameters are suggested starting from the renormalization of the with respect to the corresponding FF beam. From this point the flatness concept has been translated into one of "unflatness" and other definitions have been proposed, maintaining a strict parallelism between FFF and FF parameter concepts. Conclusions: Ideas for quality controls used in establishing a quality assurance program when introducing FFF, beams into the clinical environment are given here, keeping them similar to those used for standard FF beams. By following the suggestions in this report, the authors foresee that the introduction of FFF beams into a clinical radiotherapy environment will be as safe and well controlled as standard beam modalities using the existing guidelines. (C) 2012 American Association of Physicists in Medicine. [http://dx.doi.org/10.1118/1.4754799] (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
quality assurance, flattening filter free beams, dosimetric parameter, definition
in
Medical Physics
volume
39
issue
10
pages
6455 - 6464
publisher
American Association of Physicists in Medicine
external identifiers
  • wos:000310101900063
  • scopus:84867292402
ISSN
0094-2405
DOI
10.1118/1.4754799
language
English
LU publication?
yes
id
4276ce37-0081-4970-baa1-0fdc34327350 (old id 3283773)
date added to LUP
2013-01-07 09:42:08
date last changed
2017-07-02 04:08:17
@article{4276ce37-0081-4970-baa1-0fdc34327350,
  abstract     = {Purpose: Flattening filter free (FFF) beams generated by medical linear accelerators have recently started to be used in radiotherapy clinical practice. Such beams present fundamental differences with respect to the standard filter flattened (FF) beams, making the generally used dosimetric parameters and definitions not always viable. The present study will propose possible definitions and suggestions for some dosimetric parameters for use in quality assurance of FFF beams generated by medical linacs in radiotherapy. Methods: The main characteristics of the photon beams have been analyzed using specific data generated by a Varian TrueBeam linac having both FFF and FF beams of 6 and 10 MV energy, respectively. Results: Definitions for dose profile parameters are suggested starting from the renormalization of the with respect to the corresponding FF beam. From this point the flatness concept has been translated into one of "unflatness" and other definitions have been proposed, maintaining a strict parallelism between FFF and FF parameter concepts. Conclusions: Ideas for quality controls used in establishing a quality assurance program when introducing FFF, beams into the clinical environment are given here, keeping them similar to those used for standard FF beams. By following the suggestions in this report, the authors foresee that the introduction of FFF beams into a clinical radiotherapy environment will be as safe and well controlled as standard beam modalities using the existing guidelines. (C) 2012 American Association of Physicists in Medicine. [http://dx.doi.org/10.1118/1.4754799]},
  author       = {Fogliata, A. and Garcia, R. and Knöös, Tommy and Nicolini, G. and Clivio, A. and Vanetti, E. and Khamphan, C. and Cozzi, L.},
  issn         = {0094-2405},
  keyword      = {quality assurance,flattening filter free beams,dosimetric parameter,definition},
  language     = {eng},
  number       = {10},
  pages        = {6455--6464},
  publisher    = {American Association of Physicists in Medicine},
  series       = {Medical Physics},
  title        = {Definition of parameters for quality assurance of flattening filter free (FFF) photon beams in radiation therapy},
  url          = {http://dx.doi.org/10.1118/1.4754799},
  volume       = {39},
  year         = {2012},
}