| Lung IMRT Guidelines
from
Practical Essentials
of Intensity Modulated Radiation Therapy, second edition, ed K.S.
Clifford Chao
Target Volume Delineation |
- GTV is any visible tumor
and nodes over 1 cm
- CTV = GTV + 6mm (squamous)
and 8mm (adenocarcinoma) (to account for microscopic spread)
- PTV = CTV + 8 - 12mm (to
account for tumor motion and set up uncertainty, because tumors can
move up to 8.3mm respiratory gaiting is used if possible)
|
| Suggested Target and Normal
Tissue Dose |
- achieve tumor dose coverage
at the prescription dose
- maximum spinal cord dose
45Gy
- limit the V20 to less than
40% of total lung volume for patients receiving RT alone
- limit the V20 to less than
35% for patients receiving chemoradiation alone
- limit the V20 to less than
20% when chemoradiation is followed by surgery (and keep V10 below
40%)
- limit heart V50 to less
than 50%
- limit the length of the
esophagus to less than 16 cm receiving 60Gy
|
