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Table 6 - Correlations between the gamma passing rates and the MU delivery errors

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
Trilogy (C-series linac)
 3%/3 mm − 0.304 < 0.001 − 0.251 0.003
 2%/2 mm −0.191 0.024 −0.183 0.030 −0.312 < 0.001
 2%/1 mm −0.238 0.005 −0.323 < 0.001
 1%/2 mm −0.211 0.012 −0.305 < 0.001
 1%/1 mm −0.216 0.010 −0.330 < 0.001
TrueBeam STx (SABR + non-SABR)
 3%/3 mm −0.270 0.007
 2%/2 mm 0.236 0.018 −0.317 0.001
 2%/1 mm − 0.336 0.001
 1%/2 mm 0.243 0.015
TrueBeam STx (SABR)
 3%/3 mm −0.546 < 0.001 − 0.398 0.002
 2%/2 mm − 0.456 < 0.001 − 0.425 0.001
 2%/1 mm −0.452 < 0.001 − 0.581 < 0.001 − 0.519 < 0.001
 1%/2 mm − 0.491 < 0.001 − 0.441 < 0.001 − 0.422 0.001
 1%/1 mm − 0.625 < 0.001 − 0.583 < 0.001 − 0.496 < 0.001
TrueBeam STx (non-SABR)
 1%/2 mm 0.343 0.030 0.323 0.042
 1%/1 mm 0.369 0.019
  1. Note: Only r values with p ≤ 0.05 are shown