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Verification and implementation of dynamic wedge calculations in a treatment planning system based on a dose-to-energy-fluence formalism

Weber, Lars LU ; Ahnesjö, Anders; Nilsson, Per LU ; Saxner, Mikael and Knöös, Tommy LU (1996) In Medical Physics 23(3). p.307-316
Abstract
The use of dynamic movements on linear accelerators during irradiation has found a revised interest lately due to the integration of computers to control the accelerator. In this paper, dynamic wedge fields that are produced by moving one of the collimator blocks during irradiation are studied. Since these wedge fields differ from those of mechanical wedges, certain requirements are to be met on the treatment planning system. A pencil-beam-based treatment planning system that uses the resultant energy fluence distribution from the dynamic collimator movement has been extensively reviewed. In calculations, the system treats the dynamic collimated field as a single, modulated field that yields calculation times close to those for open beams.... (More)
The use of dynamic movements on linear accelerators during irradiation has found a revised interest lately due to the integration of computers to control the accelerator. In this paper, dynamic wedge fields that are produced by moving one of the collimator blocks during irradiation are studied. Since these wedge fields differ from those of mechanical wedges, certain requirements are to be met on the treatment planning system. A pencil-beam-based treatment planning system that uses the resultant energy fluence distribution from the dynamic collimator movement has been extensively reviewed. In calculations, the system treats the dynamic collimated field as a single, modulated field that yields calculation times close to those for open beams. Details are given on the theoretical model used for the calculation of dynamically generated dose distributions. Measurements of depth doses, profiles, and output factors in dynamic wedge fields indicate that calculations accurately predict the outcome from dynamic wedges without any additional measurements other than those used for characterization of static open beams. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Medical Physics
volume
23
issue
3
pages
307 - 316
publisher
American Association of Physicists in Medicine
external identifiers
  • pmid:8815372
  • scopus:0029883724
ISSN
0094-2405
DOI
10.1118/1.597797
language
English
LU publication?
yes
id
79cc345a-36b5-4b64-b536-ac5dc58cf75b (old id 1110185)
alternative location
http://dx.doi.org/10.1118/1.597797
date added to LUP
2008-07-30 09:49:11
date last changed
2017-07-23 04:46:42
@article{79cc345a-36b5-4b64-b536-ac5dc58cf75b,
  abstract     = {The use of dynamic movements on linear accelerators during irradiation has found a revised interest lately due to the integration of computers to control the accelerator. In this paper, dynamic wedge fields that are produced by moving one of the collimator blocks during irradiation are studied. Since these wedge fields differ from those of mechanical wedges, certain requirements are to be met on the treatment planning system. A pencil-beam-based treatment planning system that uses the resultant energy fluence distribution from the dynamic collimator movement has been extensively reviewed. In calculations, the system treats the dynamic collimated field as a single, modulated field that yields calculation times close to those for open beams. Details are given on the theoretical model used for the calculation of dynamically generated dose distributions. Measurements of depth doses, profiles, and output factors in dynamic wedge fields indicate that calculations accurately predict the outcome from dynamic wedges without any additional measurements other than those used for characterization of static open beams.},
  author       = {Weber, Lars and Ahnesjö, Anders and Nilsson, Per and Saxner, Mikael and Knöös, Tommy},
  issn         = {0094-2405},
  language     = {eng},
  number       = {3},
  pages        = {307--316},
  publisher    = {American Association of Physicists in Medicine},
  series       = {Medical Physics},
  title        = {Verification and implementation of dynamic wedge calculations in a treatment planning system based on a dose-to-energy-fluence formalism},
  url          = {http://dx.doi.org/10.1118/1.597797},
  volume       = {23},
  year         = {1996},
}