Tc-Me2P is a novel 99mTc-labeled propylene amine oxime (PnAO) derivative, which includes two 4-methyl-2-nitroimidazole groups. Primarily, Tc-Me2P serves as an imaging agent for hypoxic tumors by specifically binding to low-oxygen areas within tumor tissue. It is applicable in single-photon emission computed tomography (SPECT) and positron emission tomography (PET) imaging for detecting tumor hypoxia. Additionally, Tc-Me2P can be utilized to study the targeting properties of its diverse chemical structures in tumor versus normal tissue.