A comparison of μPET/CT images of [18F]RPS-040 and [18F]RPS-041 with [68Ga]Ga-PSMA-HBED-CC shows significantly higher kidney uptake (p < 0.0002) and lower tumor uptake (p < 0.0008) in the gallium-68 tracer at 1 h p.i. (Fig. 8). The gene discussed is CXCR1; the disease is neoplasm.