ROI analysis of micro PET/CT imaging data showed that [64Cu]Pep-1L accumulation was ~3-fold greater in doxycycline-induced B16F10-Tet-hIL13RA2 tumor bearing mice compared to non-induced ones (Figure 6A) demonstrating specificity of [64Cu]Pep-1L to IL13RA2 expressing tumors. This evidence concerns the gene IL13RA2 and neoplasm.