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 | ||