tailieunhanh - Báo cáo khoa học: "Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Radiation Oncology cung cấp cho các bạn kiến thức về ngành y đề tài: "Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy. | Radiation Oncology BioMed Central Research Reproducibility and geometric accuracy of the fixster system during hypofractionated stereotactic radiotherapy Peter Lindvall 1 Per Bergstrom2 Per-Olov Lofroth2 Roger Henriksson2 and A Tommy Bergenheim1 Address Department of Neurosurgery Umeâ University Hospital Umeâ Sweden and 2Department of Radiation sciences Umeâ University Hospital Umeâ Sweden Email Peter Lindvall - peter_lindvall_nkk@ Per Bergstrom - Per-Olov Lofroth - Roger Henriksson - A Tommy Bergenheim - Corresponding author Open Access Published 28 May 2008 Received 24 September 2007 Radiation Oncology 2008 3 16 doi 1748-717X-3-16 Accepted 28 May 2008 This article is available from http content 3 1 16 2008 Lindvall et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract 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 mm range - median mm and in the Y-axis mm range - median mm . The mean deviation in the Z-axis was range