Volumetric modulated arc therapy(VMAT) or Rapid arc is an advanced form of IMRT that delivers a precisely sculptured 3D dose distribution with a 360 degree rotation of the gantry in single or multiple arc treatment.
Advantages:
1. Faster treatment time and hence improve accuracy of radiation delivery
2. High dose conformal to the target
3. Reduces risk to normal tissues
4. Improves patient convenience
5. Better quality of life