NOTA-RHAU18 is a conjugate of the chelator NOTA and the peptide RHAU18. NOTA-RHAU18 can be used to synthesize the radiolabeled peptide probe [18F]AlF-NOTA-RHAU18. [18F]AlF-NOTA-RHAU18 targets mitochondrial DNA G4. [18F]AlF-NOTA-RHAU18 can be used to visualize and detect solid tumors in homozygous mice. [18F]AlF-NOTA-RHAU18 can also be used in PET imaging studies[1].