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Verification of motion induced thread effect during tomotherapy using gel dosimetry

Edvardsson, Anneli LU ; Ljusberg, Anna; Ceberg, Crister LU ; Medin, Joakim LU ; Ambolt, Lee; Nordström, Fredrik LU and Ceberg, Sofie LU (2015) 8th International Conference on 3D Radiation Dosimetry (IC3DDose) In 8th International Conference on 3D Radiation Dosimetry (IC3DDOSE) 573. p.012048-012048
Abstract
The purpose of the study was to evaluate how breathing motion during tomotherapy (Accuray, CA, USA) treatment affects the absorbed dose distribution. The experiments were carried out using gel dosimetry and a motion device simulating respiratory-like motion (HexaMotion, ScandiDos, Uppsala, Sweden). Normoxic polyacrylamide gels (nPAG) were irradiated, both during respiratory-like motion and in a static mode. To be able to investigate interplay effects the static absorbed dose distribution was convolved with the motion function and differences between the dynamic and convolved static absorbed dose distributions were interpreted as interplay effects. The expected dose blurring was present and the interplay effects formed a spiral pattern in... (More)
The purpose of the study was to evaluate how breathing motion during tomotherapy (Accuray, CA, USA) treatment affects the absorbed dose distribution. The experiments were carried out using gel dosimetry and a motion device simulating respiratory-like motion (HexaMotion, ScandiDos, Uppsala, Sweden). Normoxic polyacrylamide gels (nPAG) were irradiated, both during respiratory-like motion and in a static mode. To be able to investigate interplay effects the static absorbed dose distribution was convolved with the motion function and differences between the dynamic and convolved static absorbed dose distributions were interpreted as interplay effects. The expected dose blurring was present and the interplay effects formed a spiral pattern in the lower dose volume. This was expected since the motion induced affects the preset pitch and the theoretically predicted thread effect may emerge. In this study, the motion induced thread effect was experimentally verified for the first time. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
8th International Conference on 3D Radiation Dosimetry (IC3DDOSE)
volume
573
pages
012048 - 012048
publisher
IOP Publishing
conference name
8th International Conference on 3D Radiation Dosimetry (IC3DDose)
external identifiers
  • wos:000352600500048
  • scopus:84946221371
ISSN
1742-6596
1742-6588
DOI
10.1088/1742-6596/573/1/012048
language
English
LU publication?
yes
id
ac0cf470-bcf4-4b3a-b94b-69ac0aa1377b (old id 5402738)
date added to LUP
2015-05-19 13:17:09
date last changed
2017-08-02 09:59:55
@inproceedings{ac0cf470-bcf4-4b3a-b94b-69ac0aa1377b,
  abstract     = {The purpose of the study was to evaluate how breathing motion during tomotherapy (Accuray, CA, USA) treatment affects the absorbed dose distribution. The experiments were carried out using gel dosimetry and a motion device simulating respiratory-like motion (HexaMotion, ScandiDos, Uppsala, Sweden). Normoxic polyacrylamide gels (nPAG) were irradiated, both during respiratory-like motion and in a static mode. To be able to investigate interplay effects the static absorbed dose distribution was convolved with the motion function and differences between the dynamic and convolved static absorbed dose distributions were interpreted as interplay effects. The expected dose blurring was present and the interplay effects formed a spiral pattern in the lower dose volume. This was expected since the motion induced affects the preset pitch and the theoretically predicted thread effect may emerge. In this study, the motion induced thread effect was experimentally verified for the first time.},
  author       = {Edvardsson, Anneli and Ljusberg, Anna and Ceberg, Crister and Medin, Joakim and Ambolt, Lee and Nordström, Fredrik and Ceberg, Sofie},
  booktitle    = {8th International Conference on 3D Radiation Dosimetry (IC3DDOSE)},
  issn         = {1742-6596},
  language     = {eng},
  pages        = {012048--012048},
  publisher    = {IOP Publishing},
  title        = {Verification of motion induced thread effect during tomotherapy using gel dosimetry},
  url          = {http://dx.doi.org/10.1088/1742-6596/573/1/012048},
  volume       = {573},
  year         = {2015},
}