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Table 2 Mean CTV variations from the planning CT over time for the entire cohort

From: Anatomic change over the course of treatment for non–small cell lung cancer patients and its impact on intensity-modulated radiation therapy and passive-scattering proton therapy deliveries

 Weeks (deviations in mm)1 (mm)2 (mm)3 (mm)4 (mm)5 (mm)6 (mm)
GTVEntire cohort4.85 ± 2.036.61 ± 3.017.06 ± 3.237.92 ± 3.788.19 ± 4.188.98 ± 4.55
With ART5.98 ± 2.177.58 ± 2.829.04 ± 3.239.91 ± 3.0410.31 ± 3.4711.46 ± 4.54
No ART3.86 ± 1.285.65 ± 3.015.20 ± 1.886.06 ± 3.506.34 ± 3.926.81 ± 3.38
CTVEntire cohort4.90 ± 1.906.39 ± 2.826.87 ± 3.067.51 ± 3.487.79 ± 3.888.50 ± 4.18
With ART5.99 ± 1.977.22 ± 2.628.56 ± 3.279.32 ± 2.819.75 ± 3.3710.71 ± 4.45
No ART3.94 ± 1.245.66 ± 2.875.28 ± 1.795.81 ± 3.246.08 ± 3.546.56 ± 2.84
  1. GTV internal gross tumor volume, CTV clinical target volume, ART adaptive radiotherapy