Interestingly, though, the observed tumor enhancement was not statistically significant either in the case of [99mTc]Tc-DT11 during single NEP inhibition (6.14 ± 0.08% IA/g, p > 0.05) or of [99mTc]Tc-DT12 during NEP/ACE inhibition (4.48 ± 1.23% IA/g, p > 0.05). Here, ACE is linked to neoplasm.