Table 1.

Tissue optical properties (${\mu }_a$, ${\mu }_s^{\prime }$ and ${\mu }_{\mathrm{eff}}$, in ${\mathrm{cm}}^{-1}$) at 665 nm under pre-PDT conditions for various tissues and pleural sites. The results are expressed as mean (SD). Sample counts are the number of samples taken for each site across all successfully analyzed patients.

Tissue	Sample count	${\mu }_a$ (${\mathrm{cm}}^{-1}$)	${\mu }_s^{\prime }$ (${\mathrm{cm}}^{-1}$)	${\mu }_{\mathrm{eff}}$ (${\mathrm{cm}}^{-1}$)
Aorta	15	0.7 (0.5)	21 (13)	4.2 (2.1)
Chest wall	25	0.8 (0.8)	32 (18)	4.7 (2.3)
Diaphragm	21	1.2 (0.9)	25 (9)	5.8 (1.9)
Esophagus	5	0.6 (0.6)	28 (15)	4.5 (1.2)
Lung	21	1.3 (0.9)	20 (12)	5.8 (1.9)
Muscle	2	0.9 (0.9)	21 (15)	5.3 (1.7)
Pericardium	15	1.3 (0.8)	23 (13)	5.8 (1.4)
PM	6	0.7 (0.5)	24 (7)	4.8 (1.1)
Serratus	12	0.5 (0.5)	32 (17)	4.3 (1.7)
Skin	8	0.5 (0.5)	19 (13)	2.4 (0.6)
Tumor	6	1.0 (0.8)	22 (18)	6.1 (3.0)