THE EFFICACY OF MEGAVOLTAGE IMAGING IN THE RADICAL RADIOTHERAPY OF NONSMALL CELL LUNG-CANCER

Megavoltage imaging (MVI) has been used to obtain digital images of tr eatment fields during therapy for non-small cell lung cancer. Tumours were seen in all 33 cases studied and in three cases MVI was used to i mprove the set-up. It is concluded that in the setting of radical radi otherapy for non-small cell lung cancer this is an appropriate techniq ue for the verification and correction of field position and is an aid to quality assurance.