FIGURE 1. Experimental protocols. (A) Protocol 1: ¹⁸F-FRP170 and ¹⁴C-IAP. (B) Protocol 2: ¹⁸F-FRP170 and ¹²⁵I-BMIPP. (C) Protocol 3: ¹⁸F-FRP170 and ¹⁴C-DG. i.v. = intravenous injection.