Table 1 Structure dose constraints used for IMPT, 4π, and VMAT planning
From: Treatment planning comparison of IMPT, VMAT and 4π radiotherapy for prostate cases
Structure | Objectives |
|---|---|
PTV | 100% of Rx to 100% of CTV |
Bladder | V70 < 20% |
V40 < 60%; V45 < 50%; V60 < 40%; V70 < 20%; V75.6 < | |
Rectum | 10%; V78–80 < 5% |
Femoral heads | V45 < 50%; max dose < 50Gy |
Sigmoid colon | max dose < 50Gy |
Small bowel | max dose < 50Gy |
Anterior rectal wall | V70 < 40% |