Volumetric Modulated Arc Therapy (VMAT) is a type of IMRT technology. Its main feature is the delivery of continuous radiation treatment beams while rotating the radiotherapy device around the patient at a series of arcs or angles. During this rotation, the machine's speed, radiation intensity, and shape are simultaneously adjusted, allowing the radiation dose distribution to more precisely conform to the treatment target, thereby reducing damage to normal tissues. VMAT is an intensity-modulated radiotherapy technique that offers greater treatment flexibility and efficiency compared to other methods. Generally, VMAT can complete treatment in a shorter amount of time, usually within a few minutes, minimizing the discomfort or chance of movement for patients that may occur during prolonged treatment. VMAT is suitable for treating various cancers and tumors, including intracranial tumors, head and neck cancers, lung cancer, breast cancer, prostate cancer, and other tumors with complex shapes.
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