A 3-D Projection Model for X-ray Dark-field Imaging
A 3-D Projection Model for X-ray Dark-field Imaging
复制标题
X 射线暗场成像的 3D 投影模型
DOI:
10.1038/s41598-019-45708-9
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发表时间:
2019
影响因子:
4.6
通讯作者:
C. Riess
中科院分区:
文献类型:
--
作者:
L. Felsner;A. Maier;J. Bopp;V. Ludwig;G. Anton;C. Riess
The X-ray dark-field signal can be measured with a grating-based Talbot-Lau interferometer. It measures small angle scattering of micrometer-sized oriented structures. Interestingly, the signal is a function not only of the material, but also of the relative orientation of the sample, the X-ray beam direction, and the direction of the interferometer sensitivity. This property is very interesting for potential tomographically reconstructing structures below the imaging resolution. However, tomographic reconstruction itself is a substantial challenge. A key step of the reconstruction algorithm is the inversion of a forward projection model. In this work, we propose a very general 3-D projection model. We derive the projection model under the assumption that the observed scatter distribution has a Gaussian shape. We theoretically show the consistency of our model with existing, more constrained 2-D models. Furthermore, we experimentally show the compatibility of our model with simulations and real dark-field measurements. We believe that this 3-D projection model is an important step towards more flexible trajectories and, by extension, dark-field imaging protocols that are much better applicable in practice.
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影响因子:
6.7
作者:
Hellbach, Katharina;Yaroshenko, Andre;Pfeiffer, Franz
通讯作者:
Pfeiffer, Franz
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
S. Reza;G. Pelzer;T. Weber;C. Fröjdh;F. Bayer;G. Anton;J. Rieger;J. Thim;T. Michel;B. Norlin
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B. Norlin
影响因子:
3.8
作者:
Bevins, Nicholas;Zambelli, Joseph;Chen, Guang-Hong
通讯作者:
Chen, Guang-Hong
DOI:
--
发表时间:
2015
期刊:
Bildverarbeitung für die Medizin
影响因子:
--
作者:
Shiyang Hu;C. Riess;J. Hornegger;P. Fischer;F. Bayer;T. Weber;G. Anton;A. Maier
通讯作者:
A. Maier
影响因子:
3
作者:
A. Maier;P. Kugler;G. Lauritsch;J. Hornegger
通讯作者:
J. Hornegger