Table 5.
Means, medians, and standard deviations of median voxel dose in cGy to structures per patient (n = 15) by treatment technique
| Distributional parameter | Technique | Brainstem | Cochlea, right | Cochlea, left | Lower lip | Mandible, anterior | Mandible, middle | Mandible, posterior | Maxilla, anterior | Maxilla, posterior | Middle ear, left | Middle ear, right | Occipital scalp |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||||||
| Mean | Conventional | 416.0 | 330.8 | 328.4 | 126.2 | 196.0 | 280.7 | 2,400.5 | 157.5 | 461.4 | 399.0 | 413.9 | 86.9 |
| IMRT | 2,838.4 | 2,556.5 | 2,621.7 | 2,530.9 | 3,150.9 | 3,607.1 | 4,770.4 | 2,456.6 | 3,006.2 | 2,587.5 | 2,549.0 | 1,868.4 | |
| Median | Conventional | 289.0 | 338.0 | 320.5 | 123.5 | 176.5 | 257.0 | 980.5 | 130.5 | 353.5 | 390.0 | 403.5 | 88.5 |
| IMRT | 3,249.0 | 2,606.0 | 2,882.0 | 2,464.0 | 3,288.0 | 3,495.0 | 4,506.0 | 2,582.5 | 3,129.0 | 2,684.0 | 2,486.0 | 1,735.0 | |
| SD | Conventional | 395.8 | 55.3 | 63.5 | 45.9 | 71.6 | 125.8 | 2,626.3 | 77.8 | 535.7 | 79.4 | 91.1 | 12.7 |
| IMRT | 1,154.8 | 1,123.5 | 1,136.8 | 621.4 | 791.3 | 1,048.5 | 1,170.9 | 790.9 | 920.3 | 1,044.9 | 1,146.3 | 314.0 | |
Abbreviation: IMRT = intensity-modulated radiation therapy.