23 March 2010 Distributed source x-ray tube technology for tomosynthesis imaging
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Abstract
Tomosynthesis imaging requires projection images from different viewing angles. Conventional systems use a moving xray source to acquire the individual projections. Using a stationary distributed x-ray source with a number of sources that equals the number of required projections, this can be achieved without any mechanical motion. Advantages are a potentially faster image acquisition speed, higher spatial and temporal resolution and simple system design. We present distributed x-ray sources based on carbon nanotube (CNT) field emission cathodes. The field emission cathodes deliver the electrons required for x-ray production. CNT emitters feature a stable emission at high current density, a cold emission, excellent temporal control of the emitted electrons and good configurability. We discuss the use of stationary sources for two applications: (i) a linear tube for stationary digital breast tomosynthesis (sDBT), and (ii) a square tube for on-board tomosynthesis image-guided radiation therapy (IGRT). Results from high energy distributed sources up to 160kVp are also presented.
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F. Sprenger, X. Calderon-Colon, Y. Cheng, K. Englestad, J. Lu, J. Maltz, A. Paidi, X. Qian, D. Spronk, S. Sultana, G. Yang, O. Zhou, "Distributed source x-ray tube technology for tomosynthesis imaging", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76225M (23 March 2010); doi: 10.1117/12.844586; https://doi.org/10.1117/12.844586
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