Simultaneous-Integrated Boost Intensity-Modulated Radiation Therapy

**Semantic type:** Therapeutic or Preventive Procedure

**Definition:** A modification of intensity modulated radiation therapy that allows for the simultaneous delivery of different dose levels to different target volumes within a single treatment fraction. This can result in better sparing of critical structures, more efficient delivery, shorter treatment duration, and better biologic effectiveness.

**Synonyms:** - IMRT-SIB - Intensity Modulated Radiation Therapy Simultaneous Integrated Boost - SIB-IMRT