Fig. 4

Bar chart representing the maximum standardized uptake value (SUV_max, a), tumor-to-liver ratio (TLR, b) and tumor-to-spleen ratio (TSR, c) of ¹⁸F-OC. TLR (b) and TSR (c) were calculated by dividing the SUV_max of tumor lesions by the patient-specific SUV_mean of the liver and spleen, respectively. The TLRs for lesions in the liver and lymph nodes were significantly higher with ¹⁸F-OC (p = 0.02 and p = 0.02, respectively). All other SUV_max, TLR and TLR calculations did not show significant differences