Intensity-modulated arc therapy: principles, technologies and clinical implementation

摘要: Intensity-modulated arc therapy (IMAT) was proposed by Yu (1995 Phys. Med. Biol. 40 1435-49) as an alternative to tomotherapy. Over more than a decade, much progress has been made. The advantages and limitations of the IMAT technique have also better understood. In recent years, single-arc forms emerged become commercially adopted. leading example is volumetric-modulated (VMAT), form that delivers apertures varying weights with rotation uses dose-rate variation treatment machine. With commercial implementation VMAT, wide clinical adoption quickly taken root. However, there remains lack general understanding for planning such treatments, well what delivery compromises are Commercial promotion competition add further confusion end users. It therefore necessary provide summary this technology some guidelines on its implementation. purpose review works from radiotherapy community led adoption, point out issues still remain, providing perspective developments. Because vast experience in IMRT using multiple intensity-modulated fields, comparisons between made within areas planning, quality assurance.