Table 2.
Rectal dose comparison (figures in bold have exceeded the constraint)
| Rectal dose | Margins | D50 | D20 | D10 | D5 | Hottest 1 cc |
|---|---|---|---|---|---|---|
|
Multiplan |
5 mm/3 mm post |
15.52 |
27.13 |
32.40 |
35.32 |
37.15 |
|
RapidArc |
5 mm/3 mm post |
13.17* (p = 0.01) |
24.37* (p = 0.005) |
30.86 |
34.29 |
36.78 |
| RapidArc larger margins | 8 mm/5 mm post | 14.59 | 28.28 | 34.61* (p = 0.001) | 36.63* (p = 0.0003) | 37.7 |
*denotes those that are significantly different from Cyberknife plans (using a paired t-test, p values in brackets).