Diffusing Alpha-emitter Radiation Therapy

**Semantic type:** Therapeutic or Preventive Procedure

**Definition:** A form of interstitial brachytherapy that uses an encapsulated Radium-224 source. Each seed continuously emits short-lived alpha-emitting daughters of radium-224, which spread into the tumor microenvironment, creating a region of high alpha-particle dose.

**Synonyms:** - DaRT