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 | – | – | – | – | – | – |