Table 5 - Correlations between the gamma passing rates and the gantry angle errors
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) | ||||||||
2%/2 mm | – | – | – | – | − 0.258 | 0.010 | – | – |
1%/2 mm | – | – | – | – | − 0.242 | 0.015 | – | – |
TrueBeam STx (SABR) | ||||||||
2%/2 mm | – | – | – | – | − 0.398 | 0.002 | – | – |
1%/2 mm | – | – | – | – | − 0.405 | 0.001 | – | – |
1%/1 mm | – | – | – | – | − 0.257 | 0.048 | – | – |
TrueBeam STx (non-SABR) | ||||||||
2%/1 mm | – | – | – | – | 0.347 | 0.028 | – | – |
1%/1 mm | – | – | – | – | 0.333 | 0.035 | – | – |