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Table 1 Comparison of conventional PET/CT parameters between lepidic group and acinar-papillary group

From: Value of 18F-FDG PET/CT-based radiomics model to distinguish the growth patterns of early invasive lung adenocarcinoma manifesting as ground-glass opacity nodules

Growth pattern group Lepidic
n = 18
Acinar-papillary
n = 75
P value
Nodule type
 pGGN 4 (22.2%) 13 (17.3%) 0.630
 mGGN 14 (77.8%) 62 (82.7%)  
Location
 Subpleural/perifissural 17 (94.4%) 74 (98.7%) 0.351
 Parenchymal 1 (5.6%) 1 (1.3%)  
Shape
 Round/oval 10 (55.6%) 32 (42.7%) 0.324
 Polygonal/irregular 8 (44.4%) 43 (57.3%)  
Edge
 Smooth 11 (61.1%) 24 (32.0%) 0.022
 Lobular/spiculated 7 (38.9%) 51 (68.0%)  
Bronchial sign
 Natural 3 (16.7%) 8 (10.7%) 0.479
 Dilated/distorted/cutoff 15 (83.3%) 67 (89.3%)  
 Cystic appearance present 1 (5.6%) 13 (17.3%) 0.290
 Pleural indentation present 14 (77.8%) 65 (86.7%) 0.344
 Vascular convergence present 18 (100.0%) 73 (97.3%) 0.484
DGGN (mm) 26.4 (21.0–28.9) 24.3 (19.2–28.4) 0.918
DSolid (mm) 8.1 (3.7–15.2) 11.8 (5.6–16.1) 0.257
CTR 0.3 (0.2–0.6) 0.5 (0.3–0.7) 0.168
CTGGO (HU) − 545.5 (− 598.8–398.8) − 425.0 (− 477.5–335.0) 0.014
SUVmax 2.4 (1.7–3.3) 2.9 (2.1–4.3) 0.076
  1. Except where otherwise indicated, data are number (%) of GGNs
  2. GGO ground-glass opacity, DGGN diameter of the GGN, DSolid diameter of the solid component, CTGGO attenuation value of the GGO component on CT, SUVmax maximum standardized uptake value