Table 5.
Validation of BrainLAB imaging couch top (ICT) modeled in iPlan RT Dose treatment planning system (TPS); comparing measured dose with TPS computed dose
|
(a) 10 cm × 10 cm field size | |||||
|---|---|---|---|---|---|
| iPlan RT Dose predicted dose (cGy) | Percentage deviation from measured dose | ||||
| Angle |
Measured dose (cGy) |
No ICT |
With ICT |
No ICT |
With ICT |
| 180 |
89.3 |
92.45 |
89.34 |
3.49 |
0.01 |
| 170 |
89.0 |
92.16 |
89.00 |
3.59 |
0.04 |
| 160 |
87.9 |
91.24 |
87.92 |
3.81 |
0.03 |
| 150 |
85.9 |
89.34 |
85.92 |
4.06 |
0.07 |
| 140 |
82.4 |
86.63 |
82.44 |
5.14 |
0.05 |
| 130 |
76.7 |
82.01 |
77.59 |
6.89 |
1.13 |
| 120 |
67.5 |
74.27 |
67.32 |
10.04 |
-0.26 |
| 110 |
58.0 |
63.17 |
58.55 |
8.89 |
0.92 |
| 100 |
64.5 |
65.42 |
65.43 |
1.40 |
1.42 |
|
(b) 5 cm × 5 cm field size | |||||
| 180 |
81.2 |
84.09 |
80.48 |
3.55 |
0.90 |
| 170 |
80.8 |
83.76 |
80.14 |
3.61 |
0.87 |
| 160 |
79.7 |
82.74 |
79.03 |
3.88 |
0.78 |
| 150 |
77.5 |
80.67 |
76.76 |
4.09 |
0.96 |
| 140 |
74.0 |
77.79 |
73.26 |
5.13 |
0.99 |
| 130 |
68.3 |
72.91 |
67.74 |
6.72 |
0.85 |
| 120 |
59.2 |
64.71 |
58.56 |
9.27 |
1.12 |
| 110 |
50.0 |
53.7 |
49.78 |
7.31 |
0.52 |
| 100 | 56.0 | 55.74 | 55.74 | -0.55 | 0.55 |
Note that the “measured dose (cGy)” is the dose measured as described in phantom dose measurement through the imaging couch top.