Energy resolved X-ray grating interferometry
Energy resolved X-ray grating interferometry
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DOI：
10.1063/1.4805073
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发表时间：
2013-05-13
影响因子：
4
通讯作者：
Stampanoni, M.
中科院分区：
文献类型：
--
作者：
Thuering, T.;Barber, W. C.;Stampanoni, M.
尽管与多色辐射兼容，但光栅干涉仪 X 射线相衬成像的灵敏度很大程度上取决于 X 射线光谱。我们使用能量分辨探测器来定量研究噪声与光谱带宽的依赖性，并通过选择与实验条件匹配的最佳能带来优化系统，从而实现灵敏度最大化和最终剂量。此外，由于光谱的理论计算通常由于非理想条件而受到限制，因此能量分辨探测器可以准确地量化干涉仪引起的光谱变化，包括通量减少和光束硬化。 (C) 2013 AIP 出版有限责任公司。
Although compatible with polychromatic radiation, the sensitivity in X-ray phase contrast imaging with a grating interferometer is strongly dependent on the X-ray spectrum. We used an energy resolving detector to quantitatively investigate the dependency of the noise from the spectral bandwidth and to consequently optimize the system-by selecting the best energy band matching the experimental conditions-with respect to sensitivity maximization and, eventually, dose. Further, since theoretical calculations of the spectrum are usually limited due to non-ideal conditions, an energy resolving detector accurately quantifies the spectral changes induced by the interferometer including flux reduction and beam hardening. (C) 2013 AIP Publishing LLC.