ABSTRACT
Current SBRT systems rely on image guidance for patient repositioning at the beginning of each fraction of treatment. Typically, simulation images are transferred to the treatment console and are co-registered with kV and/or MV images acquired with the in-room imaging system from the treatment device. Osets in the resultant co-registration are detected as setup shis required to bring the patient into optimal setup correspondence with the simulation position. e clinic should have specic quality assurance procedures to evaluate the quality of the in-room imaging as well as the quality of the nal patient setup. is may include a procedure that requires the on-treatment images be reviewed and approved by the physician for each fraction.
