... Jaffray DA: Cone-beam computed tomography for on- lineimage guidance of lung stereotactic radiotherapy: localiza-tion, verification, and intrafraction tumor position. Int J RadiatOncol Biol Phys ... using tumour based image guided posi-tion verification and correction [31]. In addition, smalldelineation uncertainties will exist. Thus, a minimum of 3mm ITV to PTV margin is required in ... bronchial tree (main carina,right and left main bronchi, right and left upper lobebronchi, intermedius bronchus, right middle lobe bron-chus, lingular bronchus, right and left lower lobe bron-chi).Delineation...