| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Materials through High Resolution Coherent Imaging
|
| Presentation Title |
Nanoholotomography With Coded Apertures for Efficient Dynamic Imaging of Nanomaterials |
| Author(s) |
Viktor Nikitin, Doga Gursoy, Marcus Carlsson, Rajmund Mokso, Peter Cloetens |
| On-Site Speaker (Planned) |
Viktor Nikitin |
| Abstract Scope |
Current Projection X-ray Microscopes (PXMs) implementing the holotomography technique face challenges with in-situ nanoimaging of dynamic systems, like operando studies of semiconductors, batteries, or composite nanomaterials. Achieving high-resolution phase-contrast 3D imaging with the PXM currently requires collecting a series of tomograms at multiple sample-to-detector distances, typically 3 to 4. This process decreases temporal resolution by at least a factor of 10, making operando studies impractical.
Instead of acquiring tomographic data at multiple distances, we propose a novel approach: fixing the sample at a single distance and employing a continuously shifting coded aperture positioned in front of the sample. The reconstruction scheme in this case involves solving both the coded phase retrieval and 3D tomography problems jointly, which facilitates data consistency and results in artifacts-free reconstructions even with a single-distance acquisition. In this presentation, we will discuss our recent advancements in developing efficient dynamic imaging using holotomography and coded apertures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nanotechnology, Modeling and Simulation, Other |