Radiolabeling techniques involve attaching radioactive isotopes to molecules, allowing scientists to track and visualize biological processes. This method is widely used in fields like nuclear medicine, biochemistry, and pharmacology to study the distribution and metabolism of drugs or biological compounds in living organisms. Common radiolabeling methods include positron emission tomography (PET) and single-photon emission computed tomography (SPECT). These techniques enable researchers to monitor the behavior of labeled substances in real-time, providing valuable insights into disease mechanisms and treatment efficacy.