TrueBeam: field size = 5 × 5 cm2, MU = 100 | ||||||
Energy | 6X | 10X | ||||
Beam | AP | PA | Lt Lat | AP | PA | Lt Lat |
Effective depth (cm) | 9.8 | 12.2 | 9.2 | 9.8 | 12.2 | 9.2 |
CC Convolution (cGy) in Pinnacle | 71.0 | 65.5 | 72.2 | 80.3 | 75.6 | 81.3 |
Measurement with ion chamber (cGy) | 71.1 | 64.7 | 72.1 | 81.0 | 75.3 | 81.3 |
%Diff from measurement | −0.1 | 1.3 | 0.1 | −0.8 | 0.5 | −0.1 |
Measurement with film (cGy) | 70.3 | 63.7 | 73.0 | 79.5 | 75.1 | 81.7 |
%Diff from measurement | −1.0 | −2.7 | 1.1 | −1.0 | −0.7 | 0.5 |
Tolerance | 3% |