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Table 1 Target characteristics; central or peripheral location is based on the RTOG definition

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

  # of cases Median Range
Upper/middle/lower lobe [n] 7/2/12   
Central/peripheral location [n] 2/19   
Maximum GTV diameter [cm]   1.9 0.6 – 3.9
3D motion amplitude [mm]   6.3 1.3 – 17