Fig. 4From: Factors distinguishing invasive from pre-invasive adenocarcinoma presenting as pure ground glass pulmonary nodulesScatter plot of computed tomography-determined density of pure ground-glass nodules plotted by pathological type (AIS, adenocarcinoma in situ; CT, computed tomography; HU, Hounsfield units; IAC, invasive adenocarcinoma; MIA, minimally invasive adenocarcinoma)Back to article page