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Table 8 - Correlations between the gamma passing rates and the differences in the D95% of PTVs between the original plans and the reconstructed plans with log files

From: Reliability of the gamma index analysis as a verification method of volumetric modulated arc therapy plans

Gamma criteria MapCHECK2 measurements ArcCHECK measurements
Global gamma passing rates Local gamma passing rates Global gamma passing rates Local gamma passing rates
r p r p r p r p
TrueBeam STx (SABR + non-SABR)
 3%/3 mm – – – – – – − 0.225 0.025
 2%/2 mm – – − 0.264 0.008 – – − 0.240 0.016
 2%/1 mm – – − 0.238 0.017 – – − 0.274 0.006
 1%/2 mm −0.283 0.004 −0.294 0.003 – – −0.279 0.005
 1%/1 mm −0.333 0.001 −0.313 0.001 – – −0.318 0.001
TrueBeam STx (non-SABR)
 2%/2 mm – – −0.326 0.040 – – – –
 2%/1 mm – – −0.340 0.032 – – – –
 1%/2 mm – – −0.323 0.042 – – – –
 1%/1 mm −0.421 0.007 −0.436 0.005 – – – –
  1. Note: Only r values with p ≤ 0.05 are shown
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Radiation Oncology

ISSN: 1748-717X

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