tailieunhanh - Báo cáo khoa học: " Systematisation of spatial uncertainties for comparison between a MR and a CT-based radiotherapy workflow for prostate treatments"

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:" Systematisation of spatial uncertainties for comparison between a MR and a CT-based radiotherapy workflow for prostate treatments. | Radiation Oncology BioMed Central Research Systematisation of spatial uncertainties for comparison between a MR and a CT-based radiotherapy workflow for prostate treatments Tufve Nyholm 1 Morgan Nyberg2 Magnus G Karlsson3 and Mikael Karlsson4 Open Access Address Department of radiation sciences Oncology Umeâ University Hospital 90187 Umeâ Sweden information and Communication Technology Luleâ University of Technology Sweden 3Department of radiation physics Umeâ University Hospital 90185 Umeâ Sweden and 4Radiation physics section Department of radiation sciences Umeâ University 90187 Umeâ Sweden Email Tufve Nyholm - Morgan Nyberg - Magnus G Karlsson - Mikael Karlsson - Corresponding author Published 17 November 2009 Received 28 August 2009 Accepted 17 November 2009 Radiation Oncology 2009 4 54 doi l748-7l 7X-4-54 This article is available from http content 4 l 54 2009 Nyholm 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 In the present work we compared the spatial uncertainties associated with a MRbased workflow for external radiotherapy of prostate cancer to a standard CT-based workflow. The MR-based workflow relies on target definition and patient positioning based on MR imaging. A solution for patient transport between the MR scanner and the treatment units has been developed. For the CT-based workflow the target is defined on a MR series but then transferred to a CT study through image registration before treatment planning and a patient positioning using portal imaging and fiducial markers. Methods An open bore MRI scanner Siemens Espree has been installed in .