Volumetric Modulated Arc Therapy (VMAT)
Volumetric Modulated Arc Therapy (VMAT) is an accurate radiation therapy treatment technique used to treat a variety of cancers at NTRO. VMAT is particularly useful at treating cancers that are near vital organs such as prostate and head and neck cancers. VMAT works in a similar way to Intensity Modulated Radiation Therapy (IMRT) by modulating the radiation constantly throughout your treatment. The main advantage of VMAT is its ability to maximise the radiation dose to the target while minimising the dose to surrounding healthy organs and tissue. By limiting the dose that healthy organs and tissue receive the risk of side effects are reduced.
During VMAT treatments the Linac rotates around you while continuously delivering radiation in an arc formation. Throughout the arc, the radiation beam automatically varies in intensity and shape, this is what allows VMAT to precisely deliver a targeted treatment. VMAT is used in conjunction with IGRT to ensure that the treatment is being delivered to the correct location.