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 | 0.213 | 0.011 | − 0.447 | < 0.001 | – | – | – | – |
2%/2 mm | – | – | − 0.183 | 0.031 | 0.307 | < 0.001 | −0.355 | < 0.001 |
2%/1 mm | – | – | 0.190 | 0.025 | 0.536 | < 0.001 | − 0.211 | 0.013 |
1%/2 mm | − 0.334 | < 0.001 | – | – | 0.305 | < 0.001 | − 0.503 | < 0.001 |
1%/1 mm | – | – | – | – | 0.546 | < 0.001 | −0.374 | < 0.001 |
TrueBeam STx (SABR + non-SABR) | ||||||||
3%/3 mm | – | – | −0.339 | 0.001 | – | – | −0.382 | < 0.001 |
2%/2 mm | −0.358 | < 0.001 | −0.478 | < 0.001 | 0.211 | 0.035 | −0.369 | < 0.001 |
2%/1 mm | −0.328 | 0.001 | −0.394 | < 0.001 | 0.458 | < 0.001 | −0.230 | 0.021 |
1%/2 mm | −0.554 | < 0.001 | −0.542 | < 0.001 | – | – | −0.478 | < 0.001 |
1%/1 mm | −0.531 | < 0.001 | −0.502 | < 0.001 | 0.316 | 0.001 | −0.364 | < 0.001 |
TrueBeam STx (non-SABR) | ||||||||
3%/3 mm | – | – | – | – | – | – | −0.699 | < 0.001 |
2%/2 mm | −0.336 | 0.034 | −0.475 | 0.002 | – | – | −0.593 | < 0.001 |
2%/1 mm | −0.507 | 0.001 | −0.470 | 0.002 | 0.463 | 0.003 | – | – |
1%/2 mm | −0.577 | < 0.001 | −0.584 | < 0.001 | – | – | − 0.619 | < 0.001 |
1%/1 mm | − 0.740 | < 0.001 | − 0.622 | < 0.001 | 0.348 | 0.028 | −0.365 | 0.021 |