VMAT

Volumetric modulated arc therapy is a form of radiotherapy that modulates and dynamically conforms the radiation beam used for treatment. This allows for better healthy tissue and organ sparing while allowing more defined target coverage of dose.

Volumetric modulated arc therapy is a newer and more advanced form of intensity-modulated radiation therapy (IMRT) that delivers radiation in a continuous arc while the treatment machine rotates around the patient. This allows for a more precise conformation of the radiation dose to match the shape of the tumor and therefore spare more healthy tissue. VMAT is particularly useful for delivering radiation therapy to tumors near sensitive body organs and can achieve highly conformal dose distributions with improved target volume coverage and sparing of normal tissues compared with conventional radiotherapy techniques. The clinical use of VMAT is increasing significantly. During VMAT treatment, the machine rotates around the patient’s body in one or more rotations or arcs, delivering continuous doses of radiation toward the tumor.