What is volumetric modulated arc therapy?
Volumetric modulated arc therapy (VMAT) is a specific type of external beam radiation therapy technique that allows more difficult tumours, such as ones wrapped around other important structures or ones in close proximity to important structures, to be targeted precisely without harming the important structures. This is achieved through the use of state-of-the-art technology that can shape and modify the radiation beam as it is delivered to the patient.
To enhance the effectiveness and accuracy of VMAT treatments, they are often delivered using image guidance (or IGRT) and utilising motion management. IGRT is a process that involves imaging the patient prior to treatment and then aligning the patient precisely based on the position of their internal or external anatomy.
Motion management is typically used in conjunction with image guidance for tumours or disease that can move during treatment (due to patient breathing, for example). Most modern linacs are equipped with motion management technology.
