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• W1734703104 abstract "Grating-based phase-contrast computed tomography (PCCT) is a promising imaging tool on the horizon for pre-clinical and clinical applications. Until now PCCT has been plagued by strong artifacts when dense materials like bones are present. In this paper, we present a new statistical iterative reconstruction algorithm which overcomes this limitation. It makes use of the fact that an X-ray interferometer provides a conventional absorption as well as a dark-field signal in addition to the phase-contrast signal. The method is based on a statistical iterative reconstruction algorithm utilizing maximum-a-posteriori principles and integrating the statistical properties of the raw data as well as information of dense objects gained from the absorption signal. Reconstruction of a pre-clinical mouse scan illustrates that artifacts caused by bones are significantly reduced and image quality is improved when employing our approach. Especially small structures, which are usually lost because of streaks, are recovered in our results. In comparison with the current state-of-the-art algorithms our approach provides significantly improved image quality with respect to quantitative and qualitative results. In summary, we expect that our new statistical iterative reconstruction method to increase the general usability of PCCT imaging for medical diagnosis apart from applications focused solely on soft tissue visualization." @default.
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• W1734703104 date "2015-06-12" @default.
• W1734703104 modified "2023-09-27" @default.
• W1734703104 title "Statistical iterative reconstruction algorithm for X-ray phase-contrast CT" @default.
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• W1734703104 doi "https://doi.org/10.1038/srep10452" @default.
• W1734703104 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4464273" @default.
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