Table 4: Brainstem sparing average values
(± 1σ) for both collimator systems.
|
Group |
Parameter |
m3 |
MLC-160 |
p-value |
|
III (n = 16) |
D0.1cm3 (Gy) |
12.74 ± 1.55 |
13.61 ±
1.232 |
0.015 |
|
V
≥ 12Gy (cm3) |
0.56 ± 1.03 |
0.71 ± 0.95 |
0.003 |
|
|
V ≥ pi (cm3) |
0.37 ± 1.04 |
0.42 ± 0.98 |
0.065 |
|
|
IV (n = 14) |
D0.1cm3
(Gy) |
12.54 ± 1.93 |
13.14 ± 1.95 |
0.008 |
|
V ≥ 12Gy (cm3) |
0.29 ± 0.25 |
0.53 ± 0.39 |
< 0.001 |
|
|
V
≥ pi (cm3) |
0.08 ± 0.08 |
0.23 ± 0.20 |
0.002 |