The Diagnostic Value of Quantitative CT Analysis of Ground-Glass Volume Percentage in Differentiating Epidermal Growth Factor Receptor Mutation and Subtypes in Lung Adenocarcinoma

Figure 1

CT images use semiautomated segmentation and quantification of GGO volume percentage in a lepidic predominant invasive adenocarcinoma with EGFR mutation and GGO-containing nodule in a 65-year-old female. The tumor outer contour (blue line) and contour of the inner solid nodule (yellow line) are overlapped on each transverse image. The total tumor volume is 1.08 cm³ and the GGO volume percentage is 71.3%.