Overlap-free single-shot ptychography achieved via neural network

A significant advancement has been made by researchers who have enhanced the PtychoPINN framework, allowing for single-shot reconstructions in Fresnel coherent diffraction imaging (CDI) without overlap. This innovation could significantly decrease both acquisition time and radiation exposure at synchrotron and XFEL facilities. Detailed in a preprint on arXiv (2602.21361), this method builds on the findings of O. Hoidn et al. (Scientific Reports, 2023). It employs a differentiable forward model of coherent scattering, utilizing a Poisson photon-counting likelihood and treating real-space overlap as a variable through coordinate-based grouping. Synthetic benchmarks indicate precise reconstructions at low photon counts (~10⁴ photons/frame), and an experimental probe has successfully demonstrated overlap-free single-shot reconstruction, while also enhancing traditional multi-shot ptychography.