Table 2. Fluorescence Lifetime measurements of our human samples series.

Lifetime values (ns)	Glioma Group	Metastasis Group	Control Group	Meningioma Group	Meningioma control Group
	(n = 16)	(n = 14)	(n = 11)	(n = 8)	(n = 5)
Parameter	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)
λexc = 375 nm
NADH	4.01 (1.29)	4.05 (1.02)	3.41 (0.80)	3.94 (0.58)	5.30 (0.30)
FAD	3.88 (1.18)	4.29 (0.81)	3.87 (0.56)	3.90 (0.69)	5.22 (0.27)
λexc = 405 nm
NADH	2.55 (0.61)	2.71 (0.51)	3.38 (0.62)	3.22 (0.73)	4.58 (0.98)
FAD	2.71 (0.64)	2.71 (0.53)	3.29 (0.55)	3.27 (0.67)	4.83 (0.87)
Lipopigment	3.80 (1.18)	3.66 (0.80)	5.21 (2.72)	3.86 (0.88)	9.58 (5.16)
Porphyrin I	2.57 (0.88)	3.00 (1.17)	2.92 (1.12)	2.60 (0.46)	4.00 (0.88)
Porphyrin II	2.41 (1.19)	2.53 (1.16)	2.96 (0.92)	1.91 (0.36)	3.25 (0.77)