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Tumor volume measurement in advanced NSCLC. (a) Contrast-enhanced CT scan of the chest in a 75-year-old woman prior to therapy demonstrates a dominant nodule in the right upper lobe. Clicking a small region of interest within the lesion allows the software to automatically segment the lesion. The boundary of the lesion can be adjusted manually if necessary. (b, c) The segmented tumor is displayed in a three-dimensional fashion and the tumor volume is obtained.
