Phase-contrast imaging using polychromatic hard X-rays

  title={Phase-contrast imaging using polychromatic hard X-rays},
  author={Stephen W. Wilkins and Timur E. Gureyev and Da Chao Gao and Andrew Pogany and Andrew W. Stevenson},
IN conventional radiography, X-rays which pass through an object along different paths are differentially absorbed, and the intensity pattern of the emerging beam records the distribution of absorbing materials within the sample. An alternative approach is phase-contrast radiography, which instead records variations of the phase of the emerging radiation. Such an approach offers improved contrast sensitivity, especially when imaging weakly absorbing samples. Unfortunately, current phase… 

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