Phase–contrast X–ray computed tomography for observing biological soft tissues

  title={Phase–contrast X–ray computed tomography for observing biological soft tissues},
  author={Atsushi Momose and Tohoru Takeda and Yuji Itai and Keiichi Hirano},
  journal={Nature Medicine},
Biological soft tissues are almost transparent to hard X rays and therefore cannot be investigated without enhancement with a contrast medium, such as iodine. On the other hand, phase–contrast X–ray imaging is sensitive to light elements1–8. This is because the X–ray phase shift cross section is almost a thousand times larger than the X–ray absorption cross section for light elements such as hydrogen, carbon, nitrogen and oxygen4,5. Hence, phase–contrast X–ray imaging is a promising technique… 
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