Skip to main content

Advertisement

Table 2 PTV dose differences in liver SBRT between the CT datasets

From: Dosimetric impact of different CT datasets for stereotactic treatment planning using 3D conformal radiotherapy or volumetric modulated arc therapy

   3D-CRT VMAT
  CT datasets Δ [%] P value Δ [%] P value
ΔDmean PCT vs AIP −0.5 ± 0.7 0.04* −0.4 ± 0.5 0.03*
  MIP vs AIP −1.1 ± 0.7 0.01* −0.9 ± 0.7 0.01*
  MidV vs AIP 0.0 ± 0.3 0.39 0.1 ± 0.4 0.24
  MIP vs PCT −0.7 ± 0.9 0.06 −0.5 ± 0.7 0.07
  MidV vs PCT 0.4 ± 0.8 0.06 0.5 ± 0.6 0.05
  MIP vs MidV −1.1 ± 0.7 0.01* −0.9 ± 0.5 0.01*
ΔD2 PCT vs AIP −0.3 ± 0.4 0.05 −0.3 ± 0.5 0.06
  MIP vs AIP −1.2 ± 0.7 0.01* −1.1 ± 0.6 0.01*
  MidV vs AIP −0.2 ± 0.4 0.14 −0.1 ± 0.4 0.67
  MIP vs PCT −0.8 ± 0.8 0.01* −0.7 ± 0.7 0.01*
  MidV vs PCT 0.1 ± 0.7 0.48 0.2 ± 0.7 0.33
  MIP vs MidV −0.9 ± 0.6 0.01* −0.9 ± 0.5 0.01*
ΔD98 PCT vs AIP −0.8 ± 0.9 0.02* −0.5 ± 0.4 0.01*
  MIP vs AIP −0.6 ± 1.3 0.06 −0.8 ± 0.6 0.01*
  MidV vs AIP 0.4 ± 0.5 0.03* 0.1 ± 0.3 0.15
  MIP vs PCT 0.2 ± 0.9 0.92 −0.4 ± 0.7 0.10
  MidV vs PCT 1.2 ± 1.0 0.01* 0.6 ± 0.5 0.02*
  MIP vs MidV −1.0 ± 1.2 0.01* −0.9 ± 0.6 0.01*
ΔD95 PCT vs AIP −0.7 ± 0.8 0.02* −0.5 ± 0.4 0.02*
  MIP vs AIP −1.2 ± 1.7 0.07 −0.8 ± 0.6 0.01*
  MidV vs AIP 0.4 ± 0.6 0.04* 0.1 ± 0.3 0.08
  MIP vs PCT −0.5 ± 1.9 0.72 −0.4 ± 0.7 0.14
  MidV vs PCT 1.1 ± 0.9 0.01* 0.6 ± 0.6 0.02*
  MIP vs MidV −1.6 ± 1.3 0.01* −0.9 ± 0.5 0.01*
  1. Relative differences over all patients (mean ± standard deviation) of dosimetric values for PTV in liver SBRT between the different CT datasets for 3D-CRT and VMAT plans. PCT planning CT, AIP average intensity projection CT, MIP maximum intensity projection CT, MidV mid-ventilation CT. *assigns statistical significant values (p < 0.05)