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Table 3 Conventional quantitative CT features analyses

From: Radiomic signature based on CT imaging to distinguish invasive adenocarcinoma from minimally invasive adenocarcinoma in pure ground-glass nodules with pleural contact

Quantitative indicators IAC MIA P value
TLD (cm)
Median (25th to 75th percentile) cm
1.81 (1.40~2.56) 1.28 (0.85~1.87) 0.000
TSD (cm)
Median (25th to 75th percentile)
1.49 (1.09~2.10) 1.09 (0.79~1.61) 0.004
TVD (cm)
Median (25th to 75th percentile)
1.51 (1.23~2.13) 1.16 (0.79~1.42) 0.000
CT-LAP (HU)
Median (25th to 75th percentile)
−560.94(−625.01~− 477.06) −620.45(− 655.94~− 551.01) 0.004
RCT-LAP (HU)
Median (25th to 75th percentile)
1.54 (1.38~1.72) 1.40 (1.32~1.55) 0.034
Normal lung density (HU)
Median (25th to 75th percentile)
− 868.79(− 890.52~ −841.36) − 877.43(− 899.33~− 849.76) 0.218
  1. TLD Tumor length diameter on the largest axial plane, TSD Tumor short diameter on the largest axial plane, TVD Tumor vertical diameter on the largest coronal plane, CT-LAP CT value on the largest axial plane, RCT-LAP relative CT value on the largest axial plane, NLD-LAP normal lung density measured on the same plane with LAP, HU Hounsfield units