Fig. 2

Intraoperative view under conventional mode and NIF mode. a. Intraoperative findings of the first patient under conventional mode; b. The earliest developed tissue of the first patient under NIF mode; c. Spreading fluorescence signal over time under NIF light in the first patient; d. Intraoperative findings of the second patient under conventional mode; e. The earliest developed tissue of the second patient under NIF mode; f. Spreading fluorescence signal over time under NIF light in the second patient