Table 2: Values of Ck,100, PMMA, Cw and CTDIw in mGy standard deviation for head phantoms.
|
Position |
Phantom |
|||||
|
Adult standard (16 cm) |
Pediatric (12 cm) |
|||||
|
120 kV |
100 kV |
80 kV |
120 kV |
100 kV |
80 kV |
|
|
Central |
17.52 ± 0.03* |
11.28 ± 0.09 |
5.94 ± 0.01 |
22.99 ± 0.07 |
14.84 ± 0.06 |
8.02 ± 0.04 |
|
3 |
19.48 ± 0.02 |
12.94 ± 0.22 |
7.10 ± 0.06 |
23.84 ± 0.24 |
15.57 ± 0.14 |
8.61 ± 0.10 |
|
6 |
18.17 ± 0.09 |
11.98 ± 0.11 |
5.84 ± 0.02 |
21.98 ± 0.18 |
14.24 ± 0.15 |
7.72 ± 0.08 |
|
9 |
19.04 ± 0.04 |
12.83 ± 0.08 |
6.94 ± 0.06 |
23.67 ± 0.22 |
15.46 ± 0.08 |
8.61 ± 0.09 |
|
12 |
21.39 ± 0.38 |
14.10 ± 0.08 |
8.93 ± 0.10 |
25.26 ± 0.54 |
17.29 ± 0.22 |
9.87 ± 0.13 |
|
Cw(mGy) |
18.85 ± 0.10 |
12.40 ± 0.11 |
6.69 ± 0.04 |
23.46 ± 0.39 |
15.37 ± 0.12 |
8.47 ± 0.08 |
|
CTDIw(mGy) |
19.64 ± 0.10 |
12.80 ± 0.12 |
6.76 ± 0.04 |
24.44 ± 0.40 |
15.87 ± 0.12 |
8.56 ± 0.08 |
*Standard deviation