Carbon Ion Radiotherapy

**Semantic type:** Therapeutic or Preventive Procedure

**Definition:** Ion beam radiation therapy that uses charged carbon particle. Compared to proton beam therapy, the larger mass of carbon results in decreased beam scattering, yielding a sharper dose distribution border with minimal penumbra and two to three times the relative biological effect.

**Synonyms:** - CARBON Therapy - CIRT - Carbon Ion Radiation Therapy - Carbon Ion Radiation Therapy - External beam radiation therapy using carbon ions (procedure)