Table 3 Reduction in mean lung dose (Gy) using different PTV definitions.
From: A dosimetric analysis of respiration-gated radiotherapy in patients with stage III lung cancer
Mean lung dose (Gy) | Absolute (Gy) and relative (%) reduction in mean lung dose | |||
|---|---|---|---|---|
Patient | PTVroutine | PTVall phases vs. PTVroutine | PTVgating vs. PTVroutine | PTVgating vs. PTVall phases |
1 | 25.2 | 2.7 (10.7%) | 3.6 (14.3%) | 0.9 (4.0%) |
2 | 20.6 | 1.6 (7.8%) | 2.4 (11.7%) | 0.8 (4.2%) |
3 | 18.9 | 1.6 (8.5%) | 2.2 (11.6%) | 0.6 (3.5%) |
4 | 23.0 | 1.3 (5.7%) | 3.0 (13.0%) | 1.7 (7.8%) |
5 | 12.8 | 1.1 (8.6%) | 1.5 (11.7%) | 0.3 (2.6%) |
6 | 18.7 | 1.7 (9.1%) | 2.5 (13.4%) | 0.8 (4.7%) |
7 | 23.1 | 3.1 (13.4%) | 4.2 (18.2%) | 1.1 (5.5%) |
8 | 10.4 | 0.7 (6.7%) | 0.7 (6.7%) | 0.0 (0.0%) |
9 | 19.3 | 1.1 (5.7%) | 2.7 (14.0%) | 1.6 (8.8%) |
10 | 20.2 | 3.0 (14.9%) | 3.8 (18.8%) | 0.8 (4.7%) |
11 | 17.2 | 1.0 (5.8%) | 2.1 (12.2%) | 1.1 (6.8%) |
12 | 19.5 | 3.2 (16.4%) | 3.3 (16.9%) | 0.1 (0.6%) |
13 | 14.2 | 1.2 (8.5%) | 2.4 (16.9%) | 1.2 (9.3%) |
14 | 15.7 | 2.1 (13.4%) | 2.6 (16.6%) | 0.5 (3.7%) |
15 | 27.8 | 3.0 (10.8%) | 4.7 (16.9%) | 1.7 (6.9%) |
Mean | 19.1 | 1.9 (9.7%) | 2.8 (14.2%) | 0.9 (4.9%) |
SD | 4.6 | 0.9 (3.4%) | 1.0 (3.2%) | 0.5 (2.7%) |