Widely used as a chelating agent in medical imaging, particularly in radiopharmaceuticals for positron emission tomography (PET) scans. Its structure allows stable complexation with metal ions like gallium-68, scandium-44, and copper-64, making it ideal for labeling biomolecules such as peptides and antibodies. This enables targeted imaging of cancers and other diseases. Also employed in diagnostic and therapeutic applications due to its high selectivity, fast complexation kinetics, and in vivo stability. Additionally, it is used in research for developing new bifunctional chelators that combine imaging and therapy (theranostics).