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In this paper, we use microlocal analysis to understand what X-ray tomographic data acquisitiondoes to singularities of an object which changes during the measuring process. Depending on themotion model, we study which singularities are detected by the measured data. In particular, thisanalysis shows that, due to the dynamic behavior, not all singularities might be detected, even if theradiation ... read moresource performs a complete turn around the object. Thus, they cannot be expected to be(stably) visible in any reconstruction. On the other hand, singularities could be added (or masked)as well. To understand this precisely, we provide a characterization of visible and added singularitiesby analyzing the microlocal properties of the forwardread less
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