ABSTRACT
Treatment procedure, planning and delivery, is based on an axial CT of the patient in the treatment position. Digitally reconstructed radiographs for the respective x-ray camera’s geometric conguration are created. Initially and during treatment, image pairs taken from both x-ray cameras are used by the image guidance soware to compare the reference digitally reconstructed radiographs and live x-ray images. Depending on the tracking method, the target is located and 6D dierences (translations and rotations) between the real and the planned
target position are calculated by the image registration soware (Fu and Kuduvalli 2008). e calculated deviations are fed back into the robot manipulator to realign the linac before the delivery of each beam.
