X-ray dark-field computed tomography using a grating interferometer setup

Nicholas Bevins; Joseph Zambelli; Zhihua Qi; Guang-Hong Chen

doi:10.1117/12.844438

18 March 2010 X-ray dark-field computed tomography using a grating interferometer setup

Nicholas Bevins, Joseph Zambelli, Zhihua Qi, Guang-Hong Chen

Author Affiliations +

Proceedings Volume 7622, Medical Imaging 2010: Physics of Medical Imaging; 76220P (2010) https://doi.org/10.1117/12.844438
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

Dark-field x-ray projection imaging and dark-field neutron computed tomography have both recently been demonstrated. Such techniques provide insight into the small-angle scattering properties of the image objects. In this work, the dark-field x-ray imaging method is extended to x-ray computed tomography in order to provide unique and complementary information to the previously reported phase contrast and absorption contrast CT images. Dark-field reconstructions are presented and compared to these two other contrast mechanisms, all three of which can be obtained from a single acquisition using an x-ray grating interferometer setup. Objects which provide little absorption contrast, but have a significant small-angle scattering component, are better visualized in a dark-field CT reconstruction.

Citation Download Citation

Nicholas Bevins, Joseph Zambelli, Zhihua Qi, and Guang-Hong Chen "X-ray dark-field computed tomography using a grating interferometer setup", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76220P (18 March 2010); https://doi.org/10.1117/12.844438

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