Image guided radiotherapy (IGRT) with elekta synergy

Full text: The new generation of an Elekta linear accelerator, Elekta Synergy wa installed and commissioned recently at the Radiation Oncology Centre of Austin Health. The accelerator is equipped with integrated imaging functionality that consists of kilovoltage X-ray volume imaging (XVI) and megavoltage X-ray 2D imaging (iView GT), The imaging features, particularly the XVI. which is in the form of cone beam CT, provides IGRT capabilities with improved soft-tissue delineation for precise patient treatment positioning. The XVI system consists of a kV X-ray source and an amorphous silicon detector panel mounted opposite each other, across the drum of the digital accelerator. During image acquisition, the x-rays produced are projected as planar images onto the detector panel. The acquired images are then stored and reconstructed to a volume image, which is subsequently used for image registration by comparison with reference scans (planning CT scans). Patient positioning adjustments are applied based on the results of the registration.