Laboratory scoring system to predict hepatic indocyanine green clearance ability during fluorescence imaging-guided laparoscopic hepatectomy

Figure 1 Different liver background fluorescence intensity levels. A and B: Low fluorescence intensity liver background images of patient 1 in green fluorescence and spy display modes, respectively; C and D: Liver background images of patient 2 with relative low (common) fluorescence intensity in green fluorescence and spy display modes, respectively; E and F: High fluorescence intensity liver background images of patient 3 in green fluorescence and spy display modes, respectively; G and H: Liver background images with extremely high fluorescence intensity of patient 4 in green fluorescence and spy display modes, respectively.

Figure 2 Flow chart of this study. ICG: Indocyanine green.

Figure 3 Liver background, gallbladder, Liver tumor in different mode. A: Liver background in green fluorescence mode; B: Corresponding fluorescence area of liver background in spy mode were manually outlined by two individual investigators; C: Gallbladder in green fluorescence mode; D: Corresponding fluorescence area of gallbladder in spy mode were manually outlined by two individual investigators; E: Liver tumor in green fluorescence mode; F: Corresponding fluorescence area of liver tumor in spy mode were manually outlined by two individual investigators.

Figure 4 Receiver operating characteristic curves. A: Receiver operating characteristic (ROC) curve of fluorescence intensity of liver background (FI-LB) and liver indocyanine green clearance ability (subjective evaluation); B: ROC curve of H value and FI-LB group.