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: " Investigation of the usability of conebeam CT data sets for dose calculation. | BioMed Central Radiation Oncology Research Investigation of the usability of conebeam CT data sets for dose calculation Anne Richter Qiaoqiao Hu Doreen Steglich Kurt Baier Jurgen Wilbert Matthias Guckenberger and Michael Flentje Open Access Address Julius-Maximilians-University Department of Radiation Oncology Wuerzburg Germany Email Anne Richter - richter_a3@ Qiaoqiao Hu - hu_q@ Doreen Steglich - steglich_d@ Kurt Baier - baier_k@ Jurgen Wilbert - wilbert_j@ Matthias Guckenberger - guckenberger_m@ Michael Flentje - flentje_m@ Corresponding author Published 16 December 2008 Received I October 2008 Accepted 16 December 2008 RadiationOncology 2008 3 42 doi 1748-717X-3-42 This article is available from http content 3 1 42 2008 Richter 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 To investigate the feasibility and accuracy of dose calculation in cone beam CT CBCT data sets. Methods Kilovoltage CBCT images were acquired with the Elekta XVI system CT studies generated with a conventional multi-slice CT scanner Siemens Somatom Sensation Open served as reference images. Material specific volumes of interest VOI were defined for commercial CT Phantoms CATPhan and Gammex RMI and CT values were evaluated in CT and CBCT images. For CBCT imaging the influence of image acquisition parameters such as tube voltage with or without filter F1 or F0 and collimation on the CT values was investigated. CBCT images of 33 patients pelvis n 11 thorax n 11 head n 11 were compared with corresponding planning CT studies. Dose distributions
