Palladium Pd-103

**Semantic type:** Element, Ion, or Isotope

**Definition:** A radioisotope of the metal palladium used in brachytherapy implants or 'seed'. With a half-life of 17 days, palladium 103 administered with brachytherapy allows continuous, tumor-site specific low-energy irradiation to the tumor cell population while sparing normal adjacent tissues from radiotoxicity. (NCI04)

**Synonyms:** - PALLADIUM PD-103 - Palladium Pd 103 - Palladium-103 - Pd 103 - radioactive palladium