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Dosimetric study of the AAA algorithm for the VMAT technique using an anthropomorphic phantom in the pelvic region

Dosimetric study of the AAA algorithm for the VMAT technique using an anthropomorphic phantom in... AbstractPurposeThe objective of this work was to investigate the accuracy of AAA dose calculation algorithm for RapidArc volumetric modulated technique (VMAT) in the presence of anatomical heterogeneities in the pelvic region.Material and methodsAn anthropomorphic phantom was used to simulate a prostate case, delineating planning target volumes (PTVs) and organs at risk. VMAT plans were optimised in eclipse (v10·0) treatment planning system (TPS). The dose distributions were calculated by the AAA dose calculation algorithm. A total of 49 thermoluminiscent dosimeters were inserted into the anthropomorphic phantom and dose measurements were compared with the predicted TPS doses.ResultsThe average dose variation was −1·5% for planning target volume corresponding to the prostate and −0·3% for planning target volume corresponding to the pelvic nodes, −0·2% for the rectum, +2·4% for the bladder, −2·0% for the femoral heads and +1·0% for the intestinal package.ConclusionAAA is a reliable dose calculation for the treatment with VMAT in the anatomy of the pelvis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Radiotherapy in Practice Cambridge University Press

Dosimetric study of the AAA algorithm for the VMAT technique using an anthropomorphic phantom in the pelvic region

Journal of Radiotherapy in Practice , Volume 14 (2): 9 – Jan 12, 2015
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References (39)

Publisher
Cambridge University Press
Copyright
© Cambridge University Press 2015 
ISSN
1467-1131
eISSN
1460-3969
DOI
10.1017/S1460396914000508
Publisher site
See Article on Publisher Site

Abstract

AbstractPurposeThe objective of this work was to investigate the accuracy of AAA dose calculation algorithm for RapidArc volumetric modulated technique (VMAT) in the presence of anatomical heterogeneities in the pelvic region.Material and methodsAn anthropomorphic phantom was used to simulate a prostate case, delineating planning target volumes (PTVs) and organs at risk. VMAT plans were optimised in eclipse (v10·0) treatment planning system (TPS). The dose distributions were calculated by the AAA dose calculation algorithm. A total of 49 thermoluminiscent dosimeters were inserted into the anthropomorphic phantom and dose measurements were compared with the predicted TPS doses.ResultsThe average dose variation was −1·5% for planning target volume corresponding to the prostate and −0·3% for planning target volume corresponding to the pelvic nodes, −0·2% for the rectum, +2·4% for the bladder, −2·0% for the femoral heads and +1·0% for the intestinal package.ConclusionAAA is a reliable dose calculation for the treatment with VMAT in the anatomy of the pelvis.

Journal

Journal of Radiotherapy in Practice – Cambridge University Press

Published: Jan 12, 2015

Keywords: AAA algorithm; anthropomorphic phantom; heterogeneities calculation; volumetric arc therapy (VMAT)

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