Thüring T, Abis M, Wang Z, David C, Stampanoni M
1] Paul Scherrer Institute, Villigen PSI, Switzerland [2] Institute for Biomedical Engineering, Swiss Federal Institute of Technology, Zurich, Switzerland.
Paul Scherrer Institute, Villigen PSI, Switzerland.
Sci Rep. 2014 Jun 6;4:5198. doi: 10.1038/srep05198.
X-ray grating interferometry is a promising imaging technique sensitive to attenuation, refraction and scattering of the radiation. Applications of this technique in the energy range between 80 and 150 keV pose severe technical challenges, and are still mostly unexplored. Phase-contrast X-ray imaging at such high energies is of relevant scientific and industrial interest, in particular for the investigation of strongly absorbing or thick materials as well as for medical imaging. Here we show the successful implementation of a Talbot-Lau interferometer operated at 100 keV using a conventional X-ray tube and a compact geometry, with a total length of 54 cm. We present the edge-on illumination of the gratings in order to overcome the current fabrication limits. Finally, the curved structures match the beam divergence and allow a large field of view on a short and efficient setup.
X射线光栅干涉测量术是一种很有前景的成像技术，对辐射的衰减、折射和散射敏感。该技术在80至150 keV能量范围内的应用面临严峻的技术挑战，且大多仍未得到探索。如此高能量下的相衬X射线成像具有重要的科学和工业价值，特别是对于强吸收或厚材料的研究以及医学成像。在此，我们展示了使用传统X射线管和紧凑几何结构，在100 keV下运行的Talbot-Lau干涉仪的成功实现，其总长度为54厘米。我们提出了光栅的边缘照明方式，以克服当前的制造限制。最后，弯曲结构与光束发散相匹配，并允许在短而高效的装置上实现大视场。
