Abstract

X‐ray imaging techniques significantly advanced our understanding of materials and biology, among which phase contrast X‐ray microscopy has obvious advantages in imaging biological specimens which have low contrast by conventional absorption contrast microscopy. In this paper, three‐dimensional microstructure of arthropod with high contrast has been demonstrated by synchrotron X‐ray in‐line phase contrast tomography. The external morphology and internal structures of an earthworm were analyzed based upon tomographic reconstructions with and without phase retrieval. We also identified and characterized various fine structural details such as the musculature system, the digestive system, the nervous system, and the circulatory system. This work exhibited the high efficiency, high precision, and wide potential applications of synchrotron X‐ray phase contrast tomography in nondestructive investigation of low‐density materials and biology.

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