Toward label-free imaging of brain vasculature: frame-by-frame spatial adaptive filtration and adaptive PIV approachesMaxim A. Kurochkin, Ivan V. Fedosov and Dmitry E. PostnovEur. Phys. J. Plus, 136 7 (2021) 719DOI: https://doi.org/10.1140/epjp/s13360-021-01700-9