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25 March 2008 Tomosynthesis with source positions distributed over a surface
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Abstract
In classical tomosynthesis, the x-ray source generally is moved along a curve segment, such as a circular trajectory, within a plane that is perpendicular to the detector plane. Studies suggest that when the angular coverage and number of projection views are limited, it can be difficult to reconstruct accurate images within planes perpendicular to the detector plane in classical tomosynthesis. In this work, we investigate imaging strategies in tomosynthesis using trajectories that are not confined within a plane perpendicular to the detector plane. We expect that such trajectories can increase data information and thus lead reconstructed images with improved quality. Numerical studies were conducted for evaluating the image-reconstruction quality in classical tomosynthesis and tomosynthesis with trajectories that are not confined within a plane perpendicular to the detector plane. The results of the studies indicated that, with the same number of views, (or equivalenntly, the same amount of image radiation), data acquired in tomosynthesis with the trajectories that are not confined within a plane perpendicluar to the detector plane generally contain more information than that acquired with classical tomosynthesis and can thus yield images with improved quality.
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Dan Xia, Seungryong Cho, Junguo Bian, Emil Y. Sidky, Charles A. Pelizzari, and Xiaochuan Pan "Tomosynthesis with source positions distributed over a surface", Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69132A (25 March 2008); https://doi.org/10.1117/12.772687
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