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Volume Modulated Arc Therapy (VMAT)

VMAT is an improvisation of the IMRT technique where the dose is delivered in an arc (0–360 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 time to less than 5 minutes (compared with IMRT treatment, which takes approximately 20 to 30 min).
  • Complex plans, which are difficult to plan in IMRT, can be done with the VMAT technique.