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13 March 2009 Fast kVp switching CT imaging of a dynamic cardiac phantom
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Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 725843 (2009) https://doi.org/10.1117/12.811641
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States
Abstract
Dual energy CT cardiac imaging is challenging due to cardiac motion and the resolution requirements of clinical applications. In this paper we investigate dual energy CT imaging via fast kVp switching acquisitions of a novel dynamic cardiac phantom. The described cardiac phantom is realistic in appearance with pneumatic motion control driven by an ECG waveform. In the reported experiments the phantom is driven off a 60 beats per minute simulated ECG waveform. The cardiac phantom is inserted into a phantom torso cavity. A fast kVp switching axial step and shoot acquisition is detailed. The axial scan time at each table position exceeds one heart cycle so as to enable retrospective gating. Gating is performed as a mechanism to mitigate the resolution impact of heart motion. Processing of fast kVp data is overviewed and the resulting kVp, material decomposed density, and monochromatic reconstructions are presented. Imaging results are described in the context of potential clinical cardiac applications.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jed D. Pack, David A. Langan, Xiaoye Wu, Dan Xu, Thomas M. Benson, Andrea M. Schmitz, J. Eric Tkaczyk, William Pavlicek, Thomas F. Boltz II, Robert Payden, Jaynne Leverentz, and Paul Licato "Fast kVp switching CT imaging of a dynamic cardiac phantom", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 725843 (13 March 2009); https://doi.org/10.1117/12.811641
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