AFTER the corrections for artifacts (60Co beam)

Depth 1

Thickness (mm)

Measured dose for a field size (cGy)

% deviation between measured and calculated

7 × 7 cm2

10 × 10 cm2

15 × 15 cm2

7 × 7 cm2

10 × 10 cm2

15 × 15 cm2

0

198.820

200.000

200.620

−0.59

0

0.31

4

195.530

200.210

200.270

−2.24

0.11

0.14

8

190.830

193.240

195.070

−4.59

−3.38

−2.47

12

187.760

191.040

192.940

−6.12

−4.48

−3.53

8 (air gap)

200.500

202.740

202.850

0.25

1.37

1.42

Depth 2

Thickness (mm)

Measured dose for a field size (cGy)

% deviation between measured and calculated

7 × 7 cm2

10 × 10 cm2

15 × 15 cm2

7 × 7 cm2

10 × 10 cm2

15 × 15 cm2

0

4

199.410

199.250

201.060

−0.3

−0.37

0.53

8

189.720

191.270

193.030

−5.14

−4.36

−3.48

12

186.170

189.330

192.450

−6.92

−5.33

−3.77

8 (air gap)

206.620

207.430

208.050

3.31

3.72

4.03