Rotational Intensity-modulated Radiation Therapy

**Semantic type:** Therapeutic or Preventive Procedure

**Definition:** Intensity-modulated radiation therapy that uses a gantry that is moved around the patient at variable speeds along with a multileaf collimator that simultaneously varies the shape of the beam.

**Synonyms:** - Arc Intensity-modulated Radiation Therapy - Helical Intensity-modulated Radiation Therapy - RIMRT