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Figure 2
X-ray images of a bee and pixel intensity variations. (a)–(d) Raw images during phase stepping. (e)–(f) Intensity plot of two detector pixels during phase stepping. The green plot is from the flat-field data (without sample present), red and blue plots are with sample present corresponding to the intensity in the red and blue pixels in (a)–(d). Panels (g)–(i) show the three types of contrast obtained from data processing: (g) standard absorption image, (h) differential phase-contrast image, (i) dark-field image.

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