PURPOSE: Intensity-modulated arc therapy (IMAT) is attractive because of high-dose
conformality and efficient delivery. However, managing intrafraction motion is challenging for
IMAT. The purpose of this research was to develop and investigate electromagnetically
guided dynamic multileaf collimator (DMLC) tracking as an enabling technology to treat
moving targets during IMAT. METHODS AND MATERIALS: A real-time three-dimensional
DMLC-based target tracking system was developed and integrated with a linear accelerator …