Lesion-based detection rates and tumor-to-background ratios (TBR) were compared between the two tracers.<h4>Results</h4>In post-treatment primary tumors, detection rates were 92% for <sup>18</sup>F-FDG and 100% for <sup>68</sup>Ga-PSMA-11. The gene discussed is SMUG1; the disease is neoplasm.