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Biophysics & Medical Physics

Radiopharmaceuticals

Pharmaceutical compounds containing radioactive isotopes administered to patients for target-specific diagnostic imaging or therapy.

Governing formula Targeted Radionuclide Compound: Radiotracer + Carrier Molecule
SI unit MBq or mCi (Administered Activity)

In depth

Combines a biological carrier molecule that targets specific cellular receptors with a radioisotope emitter (gamma/positron for imaging, alpha/beta for therapy).

Examples in the real world

Fluorine-18 fluorodeoxyglucose (¹⁸F-FDG) concentrating in high-glucose-metabolism cancer cells for PET imaging.