Field Size

(cm²)

Penumbra width (cm) (Average taken from positive and negative axis) (±0.05)

0.5 cm depth profile

5.0 cm depth profile

10.0 cm depth profile

80% to 20% isodose line

90% to 20% isodose line

80% to 20% isodose line

90% to 20% isodose line

80% to 20% isodose line

90% to 20% isodose line

05 × 05

1.20

1.35

1.15

1.30

1.35

1.55

10 × 10

1.15

1.30

1.20

1.40

1.55

1.80

15 × 15

1.25

1.40

1.25

1.50

1.60

1.90

20 × 20

1.25

1.40

1.30

1.70

1.65

2.00

25 × 25

1.30

1.50

1.40

1.75

1.80

2.25

30 × 30

1.35

2.35

1.40

2.80

1.90

4.00

35 × 35

3.50

4.50

3.35

5.50

4.10

5.60