Table 5.
The absorbed dose per 1 Gy of therapeutic dose at each organ
| Organ | Modality\ID |
Organ dose per 1 Gy (cGy/Gy) |
||||
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
|
Thyroid |
IMRT |
0.4 |
0.1 |
0.6 |
1.1 |
0.3 |
| VMAT |
0.3 |
0.1 |
0.5 |
0.9 |
0.3 |
|
| TOMO |
0.4 |
0.2 |
0.4 |
0.8 |
0.2 |
|
|
Lung |
IMRT |
2.6 |
1.1 |
5.2 |
8.8 |
1.8 |
| VMAT |
2.8 |
0.1 |
5.5 |
10.1 |
2.4 |
|
| TOMO |
6.9 |
3.0 |
11.6 |
16.5 |
6.1 |
|
|
Stomach |
IMRT |
10.5 |
30.7 |
49.3 |
26.0 |
1.7 |
| VMAT |
23.4 |
30.5 |
49.5 |
30.3 |
7.3 |
|
| TOMO |
28.3 |
46.7 |
53.3 |
43.0 |
13.5 |
|
|
Normal liver |
IMRT |
41.0 |
20.1 |
45.2 |
45.7 |
29.3 |
| VMAT |
42.7 |
18.5 |
38.7 |
54.1 |
30.6 |
|
| TOMO |
47.0 |
25.3 |
44.9 |
49.8 |
35.0 |
|
|
Small intestine |
IMRT |
1.3 |
0.4 |
1.9 |
4.8 |
0.7 |
| VMAT |
1.3 |
0.5 |
1.9 |
4.8 |
1.1 |
|
| TOMO |
1.4 |
0.3 |
1.9 |
15.7 |
0.6 |
|
|
Prostate/Ovary |
IMRT |
0.5 |
0.2 |
0.5 |
1.2 |
0.3 |
| VMAT |
0.4 |
0.1 |
0.5 |
1.0 |
0.3 |
|
| TOMO |
0.4 |
0.1 |
0.5 |
0.9 |
0.2 |
|
| Rectum | IMRT |
0.3 |
0.1 |
0.4 |
0.9 |
0.2 |
| VMAT |
0.3 |
0.1 |
0.4 |
0.7 |
0.2 |
|
| TOMO | 0.3 | 0.1 | 0.3 | 0.7 | 0.2 | |
The in-field region organs were the lung, stomach, and normal liver. The other organs were out-of-field. The doses of in-field region organs were calculated from the dose-volume histogram, and the doses of out-of-field region organs were measured by RPLGD detectors inside a humanoid phantom.