Accuracy of treatment planning and quality control of radiation therapy delivery

Accurate radiation therapy delivery to the target volume depends on appropriate treatment planning, daily patient set-up with minimum localization errors and performed treatment equipments. The present report describes 1) acquisition of patient data by CT and transfers axial tomography, 2) physiological movements of target volume due to respiration and swallowing during irradiation and 3) quality control of radiation therapy delivery by detection of localization errors in daily set-up. (author)