Volume Modulated Arc Therapy (VMAT)
VMAT is the improvisation of the IMRT technique where the dose is delivered in arc (0 to 360 degrees) pattern.
- This increase in the degree of freedom helps to increase dose conformity.
- VMAT helps to deliver radiation at higher dose rates, thereby reducing overall treatment to less than 5 min (compared with IMRT treatment which takes approximately 20 to 30 min).
- Complex plans which are difficult to plan in IMRT can be done with VMAT technique