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Volumetric modulated arc therapy
(VMAT)
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Treatment of whole target volume using 1 or 2 arcs
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Simultaneous variation of 3 parameters:
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Gantry rotation speed
Treatment aperture shape via movement of multileaf collimators*
Dose rate
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1. Teoh M, et al. British J Radiol 2011;84:967–996
* Each radiation beam is modulated by continuously moving multileaf collimators
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Highly conformal dose distributions with improved target volume
coverage and sparing of normal tissues vs. conventional RT
techniques;
Potential to reduce treatment delivery time vs. conventional
static field IMRT
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