Imaging QA Program for Image Guided RadioTherapy (IGRT)

摘要

State of the art radiation therapy devices offer the possibility to acquire images directly before the treatment of the patients. These images can be used to correct for the position of the patient or to recalculate dose on a changed patient anatomy.In this work a QA program for such an imaging modality is presented on the basis of a TomoTherapy Hi-Art II system. The QA program consists of weekly, monthly and biannual checks of the imaging device.The results of the performed QA measurements were all within the tolerances of the system.The imaging capability of the TomoTherapy Hi-Art II system is an excellent tool for image guided positioning of the patient. Furthermore it is possible to perform a reliable dose calculation on the basis of the acquired images.