Figure 4: Box plot of Endogenous Fluorescence lifetime measurements for extra-axial tumor part.

Lifetime variation of NADH and FAD when exciting with 405 and 375 nm from tumorous and control tissue. Results for Lipopigment, porphyrin I and II are presented for 405 nm excitation wavelength. * and ** denote statistically significant difference (p < 0.05 and p < 0.01, respectively).