نتایج جستجو برای: 4dct

تعداد نتایج: 285  

2007
Ilhan Kaya Anand P. Santhanam Celina Imielinska Jannick Rolland

In this paper, we present a biomechanical framework to model airflow inside the bronchus and deformations across the tracheobronchial tree, pipeline for the simulator, theory and initial steps to realize this framework on a highly parallel graphical processing unit (GPU). We discuss the main challenges expected and encountered to date. By using computational fluid dynamics (CFD) and computation...

Journal: :Medical physics 2012
Justin C Park Sung Ho Park Jong Hoon Kim Sang Min Yoon Si Yeol Song Zhaowei Liu Bongyong Song Kevin Kauweloa Matthew J Webster Ajay Sandhu Loren K Mell Steve B Jiang Arno J Mundt William Y Song

PURPOSE Understanding motion characteristics of liver such as, interfractional and intrafractional motion variability, difference in motion within different locations in the organ, and their complex relationship with the breathing cycles are particularly important for image-guided liver SBRT. The purpose of this study was to investigate such motion characteristics based on fiducial markers trac...

Journal: :Medical physics 2012
Kevin I Kauweloa Dan Ruan Justin C Park Ajay Sandhu Gwe Ya Kim Todd Pawlicki W Tyler Watkins Bongyong Song William Y Song

PURPOSE To assess the temporal and spatial accuracy of the GateCT™ system (VisionRT, London, UK), a recently released respiratory tracking system for 4DCT, under both ideal and nonideal respiratory conditions. METHODS Three experiments were performed by benchmarking and comparing its results with the ground-truth input data and those generated by the widely used Varian RPM™ system (Real-time ...

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