A<unk>  is a radioactive substance that is given through a vein, and collects in<unk>  cells and in tumor cells that have spread to the<unk> . It kills cancer cells by giving off low-level radiation.
Bone-seeking radioisotope
Phosphate binder
Radioactive tracer
Radiocontrast agent
PET radiotracer
Bisphosphonate
Peptide receptor radionuclide therapy
Parathyroidectomy