1 September 2010 Four-dimensional x-ray phase tomography with Talbot interferometer and white synchrotron light
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Taking advantage of the fact that an X-ray Talbot interferometer functions with X-rays of a broad energy bandwidth, high-speed X-ray phase tomography has been demonstrated by using white synchrotron light. Time resolution in addition to three-dimensional spatial resolution has been attained, and we report this achievement as the first four-dimensional (4D) X-ray phase tomography. Moire image movies of samples rotating at a speed of 1 or 2 rps generated by a Talbot interferometer were recorded at a frame rate of up to 1 kf/s, and differential phase image movies of the same frame rate were created by the Fourier-transform method. Consequently, a sub-second time resolution was achieved in the 4D phase tomography, while the spatial resolution was below 0.1 mm and 0.05 mm in axial and in-plane directions, respectively. An X-ray Talbot interferometer generates visibility images in addition to differential phase images, showing the distribution of microstructures, which cause ultra-small angle scattering but cannot be resolved individually with system spatial resolution. Tomographic image reconstruction from the visibility images was also demonstrated.
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Atsushi Momose, Atsushi Momose, Wataru Yashiro, Wataru Yashiro, Sebastien Harasse, Sebastien Harasse, Hiroaki Kuwabara, Hiroaki Kuwabara, Katsuyuki Kawabata, Katsuyuki Kawabata, "Four-dimensional x-ray phase tomography with Talbot interferometer and white synchrotron light", Proc. SPIE 7804, Developments in X-Ray Tomography VII, 780405 (1 September 2010); doi: 10.1117/12.859235; https://doi.org/10.1117/12.859235

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