Photons meeting: “Advancing X-ray Multi-Projection Imaging: Towards Four-Dimensional Reconstruction and Analysis of Rapid Flows”

At this NanoLund Photon’s meeting, Zisheng Yao from Synchrotron Radiation Research will give a talk. This is the rehearsal for his PhD defense on May 22^nd. 

Abstract:

Large-scale X-ray facilities deliver extremely high photon flux densities, enabling non-destructive four-dimensional (3D + time) imaging of fast dynamics under in-situ or operando conditions with unprecedented spatiotemporal resolution. State-of-the-art 4D X-ray imaging at such facilities relies on tomography and can achieve up to thousands of volume reconstructions per second at micrometer resolution, but the required high-speed sample rotation induces strong centrifugal forces that limit studies of rotation-sensitive phenomena. To overcome this limitation, X-ray Multi-Projection Imaging (XMPI) has emerged as a rotation-free approach that splits the primary beam into multiple angularly separated beams for simultaneous multi-angle acquisition, enabling ultrafast imaging while posing significant challenges for 4D reconstruction and analysis in the sparse-view regime. In this presentation, I will present the implementation of an XMPI setup at ForMAX beamline, MAX IV, followed by 3D particle tracking velocimetry and deep-learning-based sparse-view 4D reconstruction methods with XMPI, which demonstrate that XMPI enables rotation-sensitive fluid-dynamics studies with sub‑10 µm spatial resolution and kHz‑to‑MHz temporal resolution.

Welcome!