tailieunhanh - Báo cáo khoa học: " Phantom investigation of 3D motion-dependent volume aliasing during CT simulation for radiation therapy planning"

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: " Phantom investigation of 3D motion-dependent volume aliasing during CT simulation for radiation therapy planning. | BioMed Central Radiation Oncology Open Access Phantom investigation of 3D motion-dependent volume aliasing during CT simulation for radiation therapy planning James ATanyi 1 Martin Fuss2 3 Vladimir Varchena4 Jack L Lancaster5 and Bill J Salter6 Address Department of Radiation Oncology University of Arizona Health Science Center Tucson AZ 85724 USA 2Department of Radiation Oncology and Radiation Medicine Oregon Health and Science University Portland OR 97239 USA 3Department of Radiation Oncology University of Texas Health Science Center at San Antonio San Antonio TX 78229 USA Computerized Imaging Reference Systems CIRS Incorporated Norfolk VA 23513 USA 5Research Imaging Center University of Texas Health Science Center at San Antonio San Antonio TX 78284 USA and 6Department of Radiation Oncology University of Utah Huntsman Cancer Institute Salt Lake City UT 84112 USA Email James ATanyi - jtanyi@ Martin Fuss - fussm@ Vladimir Varchena - vlad@ Jack L Lancaster - jlancaster@ Bill J Salter - Corresponding author Published 24 February 2007 Received II December 2006 Radiation Oncology 2007 2 10 doi 1748-717X-2-10 Accepted 24 February 2007 This article is available from http content 2 1 10 2007 Tanyi 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 Purpose To quantify volumetric and positional aliasing during non-gated fast- and slow-scan acquisition CT in the presence of 3D target motion. Methods Single-slice fast single-slice slow and multi-slice fast scan helical CTs were acquired of dynamic spherical targets 1 and cm in diameter embedded in an anthropomorphic phantom. 3D target motions typical of clinically .