Opening the frontier of the 4D world. Yashiro Laboratory

4D X-ray Tomography with Millisecond Temporal Resolution

We are the first in the world to successfully perform X-ray tomography (CT) with millisecond temporal resolution. Recently, we have also developed optical elements to make a synchrotron X-ray beam into a few tens of beams and demonstrated, by using a data science technique called compressed sensing, that X-ray CT can be achieved in 1 msec without rotating the sample. Through the advancement of this technology and its application, we aim to explore the unknown 4D spatio-temporal domain.

This research has been supported by JST CREST.

[References]

• Sumitomo Rubber & Tohoku University Succeed in Increasing Speed of X-Ray CT Imaging of Rubber Failure Phenomena by Approximately 1,000x (video available)
• Unlocking the Gate to the Millisecond CT
• Success in X-ray CT with high spatial resolution on the order of milliseconds

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X-ray Elastography

We are developing a technique to visualize the distribution of elastic moduli in a sample with high spatial resolution by determining the local propagation velocity of shear elastic waves in the sample using X-ray imaging. This technique is expected to have a variety of ripple effects, including applications in medical diagnosis and functional soft material research.

This research was supported by AMED SENTAN.

[References]

• Not Just for Bones! X-rays Can Now Tell Us about Soft Tissues too

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Fabricating Optical Elements for X-rays and Neutrons

We are developing optical elements to realize X-ray imaging (or neutron imaging) beyond the conventional limits by using advanced micro- and nano-fabrication technologies.

[References]

• A metallic glass grating for X-ray grating interferometers fabricated by imprinting
• Fabrication of X-ray absorption grating using an ultracentrifuge machine
  

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Exploring new modalities

By combining X-ray structural analysis of surfaces and interfaces with X-ray imaging techniques using advanced X-ray interferometry, we are also challenging to develop new modalities, such as visualizing the spatial distribution of structural parameters of surfaces and interfaces.

[References]

• Probing Surface Morphology using X-ray Grating Interferometry

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