Table 3. Cerenkov Luminescence measurements of the study group (n=7) grouped to positive surgical margins (n=3) and negative surgical margins (n=4).

Data of the study group (n=7)	CLI Data without 550-nm short-pass filter	CLI Data with 550-nm short-pass filter	P value
Median prostate background, photons/s/cm2/sr (IQR)	2,392.00 (1,849.17; 6,150.75)	1,465.50 (1,373.00; 1,776.08)	0.018
Median TBR with PSM (IQR)	3.33 (2.79; 5.73)	2.10 (1.50; 2.15)	Not significant
Median TBR without PSM (IQR)	3.61 (2.95; 11.77)	1.11 (1.09; 1.47)	Not significant
Median CNR with PSM (IQR)	14.98 (11.73; 16.20)	6.54 (2.44; 6.71)	Not significant
Median CNR without PSM (IQR)	11.16 (9.83; 178.31)	0.56 (0.50; 3.58)	Not significant

TBR and CNR are stated as median values (IQR). CLI, Cerenkov Luminescence Imaging; CNR, contrast to noise ratio; IQR, interquartile ranges; PSM, positive surgical margin; TBR, tumor to background ratio.