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FIGURE 1. Role of 18F-FDG PET in delineating volume of lung cancer. (A) Axial, coronal, and sagittal CT slices from patient with lung cancer located in left hilar region, associated with retroobstructive atelectasis of entire left lung, and associated with major pleural effusion. (B) Metabolic information provided by 18F-FDG PET shows that tumor tissue is confined to hilum. Delineation of tumor margin is easier and more accurate with help of 18F-FDG PET, allowing for significant modification of target volume.
