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The speckle‐based X‐ray imaging technique (SBT), which includes the three imaging modalities of absorption, phase contrast and dark field, is widely used in many fields. However, the influence of the grain size of the diffuser, the coherence of the X‐ray source and the pixel size of the detector on the multi‐mode imaging quality of SBT is still woefully unclear. In this paper, the whole SBT process...
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