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Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy

BACKGROUND: Hypofractionated radiotherapy has been used for the treatment of AVMs and brain metastases. Hypofractionation necessitates the use of a relocatable stereotactic frame that has to be applied on several occasions. The stereotactic frame needs to have a high degree of reproducibility, and p...

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Autores principales: Lindvall, Peter, Bergström, Per, Löfroth, Per-Olov, Henriksson, Roger, Bergenheim, A Tommy
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2008
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2423357/
https://www.ncbi.nlm.nih.gov/pubmed/18507861
http://dx.doi.org/10.1186/1748-717X-3-16
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author Lindvall, Peter
Bergström, Per
Löfroth, Per-Olov
Henriksson, Roger
Bergenheim, A Tommy
author_facet Lindvall, Peter
Bergström, Per
Löfroth, Per-Olov
Henriksson, Roger
Bergenheim, A Tommy
author_sort Lindvall, Peter
collection PubMed
description BACKGROUND: Hypofractionated radiotherapy has been used for the treatment of AVMs and brain metastases. Hypofractionation necessitates the use of a relocatable stereotactic frame that has to be applied on several occasions. The stereotactic frame needs to have a high degree of reproducibility, and patient positioning is crucial to achieve a high accuracy of the treatment. METHODS: In this study we have, by radiological means, evaluated the reproducibility of the isocenter in consecutive treatment sessions using the Fixster frame. Deviations in the X, Y and Z-axis were measured in 10 patients treated with hypofractionated radiotherapy. RESULTS: The mean deviation in the X-axis was 0.4 mm (range -2.1 – 2.1, median 0.7 mm) and in the Y-axis -0.3 mm (range -1.4 – 0.7, median -0.2 mm). The mean deviation in the Z-axis was -0.6 (range -1.4 – 1.4, median 0.0 mm). CONCLUSION: There is a high degree of reproducibility of the isocenter during successive treatment sessions with HCSRT using the Fixster frame for stereotactic targeting. The high reducibility enables a safe treatment using hypofractionated stereotactic radiotherapy.
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spelling pubmed-24233572008-06-10 Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy Lindvall, Peter Bergström, Per Löfroth, Per-Olov Henriksson, Roger Bergenheim, A Tommy Radiat Oncol Research BACKGROUND: Hypofractionated radiotherapy has been used for the treatment of AVMs and brain metastases. Hypofractionation necessitates the use of a relocatable stereotactic frame that has to be applied on several occasions. The stereotactic frame needs to have a high degree of reproducibility, and patient positioning is crucial to achieve a high accuracy of the treatment. METHODS: In this study we have, by radiological means, evaluated the reproducibility of the isocenter in consecutive treatment sessions using the Fixster frame. Deviations in the X, Y and Z-axis were measured in 10 patients treated with hypofractionated radiotherapy. RESULTS: The mean deviation in the X-axis was 0.4 mm (range -2.1 – 2.1, median 0.7 mm) and in the Y-axis -0.3 mm (range -1.4 – 0.7, median -0.2 mm). The mean deviation in the Z-axis was -0.6 (range -1.4 – 1.4, median 0.0 mm). CONCLUSION: There is a high degree of reproducibility of the isocenter during successive treatment sessions with HCSRT using the Fixster frame for stereotactic targeting. The high reducibility enables a safe treatment using hypofractionated stereotactic radiotherapy. BioMed Central 2008-05-28 /pmc/articles/PMC2423357/ /pubmed/18507861 http://dx.doi.org/10.1186/1748-717X-3-16 Text en Copyright © 2008 Lindvall et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( (http://creativecommons.org/licenses/by/2.0) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Lindvall, Peter
Bergström, Per
Löfroth, Per-Olov
Henriksson, Roger
Bergenheim, A Tommy
Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy
title Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy
title_full Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy
title_fullStr Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy
title_full_unstemmed Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy
title_short Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy
title_sort reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2423357/
https://www.ncbi.nlm.nih.gov/pubmed/18507861
http://dx.doi.org/10.1186/1748-717X-3-16
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