Figure 5e. Portals used for irradiation of lung cancer. (a, b) Portal radiographs demonstrate portals used for irradiation of non-small cell lung cancer in the upper lobes. Note the unilateral (a) and bilateral (b) supraclavicular fields. (c, d) Portal radiographs demonstrate portals used for irradiation of non-small cell lung cancer in the lower lobes. The supraclavicular areas are included if there is a gross mediastinal tumor in the lower lobe (d). (e, f) Portal radiographs demonstrate portals used for irradiation of small cell lung cancer, including a limited portal (e) and a larger portal that includes both hilar regions, the entire mediastinum, and the supraclavicular region (f).