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Table 3 Differences between the IG technique using 4D-CBCT and the two IG techniques using 3D-CBCT (average ± one standard deviation [StDev])

From: Accuracy and inter-observer variability of 3D versus 4D cone-beam CT based image-guidance in SBRT for lung tumors

  LR [mm] SI [mm] AP [mm] 3D vector [mm]
  Average St Dev Average St Dev Average St Dev Average St Dev
IG-4D minus IG-3D 0.1 ± 0.9 1.2 ± 4.3 0.0 ± 1.8 3.6 ± 3.2
IG-4D minus IG-ITV 0.0 ± 0.7 0.9 ± 1.5 0.0 ± 1.0 1.9 ± 0.9
  1. Left-right direction (LR), superior-inferior direction (SI) and anterior-posterior direction (AP).