Fig. 1. The method of multi-scale NIR-II fluorescence intravital imaging

Fig. 2. Multi-scale NIR-II fluorescence intravital imaging device. (a) Diagram of the multi-scale NIR-II fluorescence imaging intravital device, which is divided into macro imaging modules and micro imaging modules; (b) Diagram of the multi-scale NIR-II fluorescence intravital imaging system model; (c)-(d) Working diagrams of macroscopic and microscopic imaging, respectively

Fig. 3. The experiment results of Multi-Scale NIR-II fluorescence intravital imaging in vivo. (a) Images of macroscopic observations of control laboratory rat with non-fluorescent livers; (b) Images of macroscopic observations of laboratory rat with fluorescently labeled livers; (c) Microscopic imaging of fluorescently labeled liver tissue in living laboratory rat; (d) The images obtained from the 12-row ×15-column traversal scan of the liver of living laboratory rat were spliced; (e) The microscopic global image of the liver; (f) Relationship between microscopic images of liver and laboratory rat

Fig. 4. Block matching image stitching method based on gray-level information