Table 2.
Comparison of PSPT vs. IMRT, IMPT vs. IMRT, and IMPT vs. IMRT for three lung volumes: total lung (minus PTV), contralateral lung, and ipsilateral lung
| |
|
PSPT vs. IMRT |
IMPT vs. IMRT |
IMPT vs. PSPT |
|||
|---|---|---|---|---|---|---|---|
| ∆ (%) | p value | ∆ (%) | p value | ∆ (%) | p value | ||
| Total lung |
V5 |
−22.8 |
0.002 |
−41.7 |
<0.001 |
−24.5 |
0.001 |
| |
V10 |
−8.6 |
0.2 |
−37.3 |
<0.001 |
−31.4 |
<0.001 |
| |
V20 |
2.9 |
0.7 |
−34.5 |
<0.001 |
−36.4 |
<0.001 |
| |
V30 |
22.1 |
0.005 |
−26.2 |
0.001 |
−39.6 |
<0.001 |
| |
Mean (cGy) |
−7.3 |
0.2 |
−38.4 |
<0.001 |
−33.5 |
<0.001 |
| Contralateral lung |
V5 |
−29.4 |
<0.001 |
−52.8 |
<0.001 |
−33.1 |
<0.001 |
| |
V10 |
22.1 |
0.006 |
−26.2 |
0.001 |
−39.6 |
<0.001 |
| |
V20 |
−1.7 |
0.8 |
−42.5 |
<0.001 |
−41.5 |
0.002 |
| |
V30 |
15.7 |
0.009 |
−27.5 |
0.03 |
−37.3 |
<0.001 |
| |
Mean (cGy) |
−17.1 |
0.006 |
−47.3 |
<0.001 |
−36.4 |
<0.001 |
| Ipsilateral lung |
V5 |
−13.5 |
0.02 |
−26.1 |
<0.001 |
−14.6 |
0.007 |
| |
V10 |
−5.8 |
0.3 |
−25.6 |
<0.001 |
−21.0 |
<0.001 |
| |
V20 |
5.1 |
0.4 |
−23.9 |
<0.001 |
−27.6 |
<0.001 |
| |
V30 |
18.8 |
0.007 |
−19.4 |
0.009 |
−32.1 |
<0.001 |
| Mean (cGy) | 2.3 | 0.6 | −23.9 | <0.001 | −25.6 | <0.001 | |
Delta represents change of first technique listed versus baseline comparison technique (second listed).