Table 2. IMRT doses of critical structures and dose-volume histogram irradiated with recurrent NPC.
| Average (range) | Average (range) | ||
|---|---|---|---|
| GTV | 61cc (5-200) | left TMJ | 31.19Gy (1.3-72.24) |
| PTV | 136cc (31-435) | right TMJ | 36.07Gy (1.24-71.79) |
| GTV average max dose | 76.46Gy (52.08-84.07) | Left Optic nerve | 24.61Gy (0.78-68.92) |
| GTV average min dose | 56.88Gy (10.65-72.77) | Right Optic nerve | 24.31Gy (0.45-72.01) |
| GTV average dose | 70.95Gy (49.8-76.58) | Optic chiasm | 30.17Gy (0.8-71.13) |
| D95 | 6575cGy (0.99-75.92) | Brain stem | 24.06Gy (1.16-54.36) |
| V95 (100%) | 96%(47%-100%) | Spinal cord | 9.99Gy (0.29-53.76) |
| PTV average dose | 72.7Gy (48.5-72.91) | Left len | 5.41Gy (0.67-62.38) |
| left temporal lobe | 22.64Gy (0.75-63.92) | Right len | 6.06Gy (0.73-71.57) |
| left temporal lobe | 23.07Gy (0.67-63.05) | pytuitary | 4.46Gy (0.7-75.4) |
Abbreviations: TMJ= Temporomandibular joint