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%