期刊
SCIENTIFIC REPORTS
卷 11, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41598-021-02960-2
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资金
- Karlsruhe Nano Micro Facility (KNMF), a Helmholtz Research Infrastructure at Karlsruhe Institute of Technology (KIT)
- European Research Council [AdG 695045]
- DFG [GRK 2274]
- Federal Ministry of Education and Research (BMBF)
- Free State of Bavaria under the Excellence Strategy of the Federal Government and the Lander
- Technical University of Munich -Institute for Advanced Study
X-ray dark-field imaging has been successfully used to retrieve 3D information for human thorax sized objects, with a method similar to classic tomography and tomosynthesis.
X-ray dark-field imaging is a widely researched imaging technique, with many studies on samples of very different dimensions and at very different resolutions. However, retrieval of three-dimensional (3D) information for human thorax sized objects has not yet been demonstrated. We present a method, similar to classic tomography and tomosynthesis, to obtain 3D information in X-ray -imaging. Here, the sample is moved through the divergent beam of a Talbot-Lau interferometer. Projections of features at different distances from the source seemingly move with different velocities over the detector, due to the cone beam geometry. The reconstruction of different focal planes exploits this effect. We imaged a chest phantom and were able to locate different features in the sample (e.g. the ribs, and two sample vials filled with water and air and placed in the phantom) to corresponding focal planes. Furthermore, we found that image quality and detectability of features is sufficient for image reconstruction with a dose of 68 mu Sv at an effective pixel size of 0.357 x 0.357 mm(2). Therefore, we successfully demonstrated that the presented method is able to retrieve 3D information in X-ray dark-field imaging.
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