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: " A fast radiotherapy paradigm for anal cancer with volumetric modulated arc therapy (VMAT). | Radiation Oncology BioMed Central Research A fast radiotherapy paradigm for anal cancer with volumetric modulated arc therapy VMAT Florian Stieler 1 Dirk Wolff1 Frank Lohr1 Volker Steil1 Yasser Abo- Madyan1 2 Friedlieb Lorenz1 Frederik Wenz1 and Sabine Mai1 Open Access Address Department of Radiation Oncology University Medical Center Mannheim University Heidelberg Germany and 2Department of Radiation Oncology and Nuclear Medicine NEMROCK Faculty of Medicine Cairo University Egypt Email Florian Stieler Frank Volker Steil - Yasser Abo-Madyan - Friedlieb Lorenz - Frederik Wenz - Sabine Mai - Corresponding author Published 25 October 2009 Received 15 July 2009 Radiation Oncology 2009 4 48 doi 1748-717X-4-48 Accepted 25 October 2009 This article is available from http contentM 1M8 2009 Stieler 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 Purpose Radiotherapy RT volumes for anal cancer are large and of moderate complexity when organs at risk OAR such as testis small bowel and bladder are at least partially to be shielded. Volumetric intensity modulated arc therapy VMAT might provide OAR-shielding comparable to step-and-shoot intensity modulated radiotherapy IMRT for this tumor entity with better treatment efficiency. Materials and methods Based on treatment planning CTs of 8 patients we compared dose distributions comformality index CI homogeneity index HI number of monitor units MU and treatment time TTT for plans generated for VMAT 3D-CRT and step-and-shoot-IMRT optimized based on Pencil Beam
