From: Dosimetric benefit to organs at risk following margin reductions in nasopharyngeal carcinoma treated with intensity-modulated radiation therapy
Variable
Pre-correction
Post-correction
ML
SI
AP
Ī£a (mm)
1.4
1.0
0.4
0.5
Ļb (mm)
0.8
0.7
0.6
PTV (mm)
4.0
3.1
1.5
1.7
1.6