Welcome to the BioPhase Imaging Group, an interdisciplinary research laboratory at the Warsaw University of Technology. We develop methodologies and computational algorithms for 2D and 3D Quantitative Phase Imaging, enabling non-invasive, label-free imaging of biological samples. Our work encompasses the creation of tailored 3D metrological microphantoms for optical system evaluation and the advancement of in vitro and in vivo cellular analysis, notably through the ERC-funded Re.HOT project. Combining optical engineering with a strong commitment to open-source software, our group focuses on providing biomedical professionals with accurate and reliable volumetric data.