Millisecond-order X-ray phase tomography with compressed sensing

Abstract

We report on millisecond-order X-ray tomography with grating-based X-ray imaging using a white synchrotron X-ray beam. We performed a compressed sensing technique for tomographic reconstruction and successfully obtained a phase tomogram for a polypropylene sphere with a temporal resolution of 2.0 ms. Our approach will make it possible to realize millisecond-order four-dimensional X-ray tomography but also to markedly reduce the radiation damage of samples including polymer and biological materials, and will be widely used in various fields of material and life sciences in the near future.

Exploring Frontiers of 4D X-ray Tomography

“…Highly intense synchrotron radiation X-rays can solve this problem [27][28][29][30][31]. The authors succeeded in X-ray CT with an imaging time on the order of milliseconds by using a third-generation synchrotron radiation source and rotating samples at high speed [27][28][29]. The experiments were performed at the experimental station BL28B2 at SPring-8, a large synchrotron radiation facility.…”

“…To increase the field of view, the so-called offset CT was used: the two projections from opposite directions were combined to obtain a single projection image. Since only 76 projections for a half turn of the sample can be obtained, using the classical CT reconstruction algorithm (filtered back-projection algorithm) results in radial artifacts as shown in the left pad in the figure . A compressed sensing-based CT reconstruction method has recently attracted attention as a solution to this problem [28,[44][45][46][47][48][49]. In this method, images are recovered from a small number of observation data samples by using the inherent sparsity of images.…”

“…Figure 5. Experimental setup (side view) of millisecond X-ray CT conducted by X-ray grating interferometry using white synchrotron radiation at BL28B2 of SPring-8[27][28][29].Copyright (2017Copyright ( , 2018 The Japan Society of Applied Physics.…”

In Situ Visualization of Li-Whisker with Grating-Interferometry-Based Tricontrast X-ray Microtomography

“…This is particularly important for accessing the dynamic information on the lithium cell upon electrochemical cycling. Some recent studies − have demonstrated that high speed (0.5 s) and even real-time (2–4.43 ms) X-ray tricontrast imaging can be achieved by using the white or pink synchrotron X-ray beams. The high-throughput tricontrast imaging approach could offer insights into the evolution of the microstructure of the lithium deposit under different cycling conditions.…”

The white beam station at imaging beamline BL-4, Indus-2

“…This substantial reduction in flux leads to longer data acquisition times, reduced signal-to-noise ratios and difficulty in achieving high resolution at BL-4. In several scientific and industrial applications, the demand for higher flux density and increased penetration depth in real-time imaging and in situ material testing experiments far outweighs the advantages offered by a ISSN 1600-5775 monochromatic beam (Patterson et al, 2018;Singh et al, 2014;Yashiro et al, 2017;Reinhart et al, 2014;García-Moreno et al, 2018). In fact, for phase-contrast imaging, there is only a moderate requirement of temporal coherence for many advanced phase contrast techniques, such as X-ray speckle imaging, grating-based phase-contrast imaging etc.…”