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. © 2008 Lindvall et al; licensee BioMed Central Ltd.
CITATION STYLE
Lindvall, P., Bergström, P., Löfroth, P. O., Henriksson, R., & Tommy, A. T. (2008). Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy. Radiation Oncology, 3(1). https://doi.org/10.1186/1748-717X-3-16
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