Table 1 Dose volume constraints for target volumes as well as organs at risk
From: The effect of extremely narrow MLC leaf width on the plan quality of VMAT for prostate cancer
Structure | Initial dose volume constraints | Relative priority |
|---|---|---|
Primary plan | ||
Primary PTV | D100% ≥ 99.5 % of the prescription dose | 150 |
D98% ≥ 100 % of the prescription dose | 150 | |
D2% ≤ 101 % of the prescription dose | 150 | |
Dmax ≤ 102 % of the prescription dose | 150 | |
Rectal wall | V44Gy ≤ 20 % | 100 |
V30Gy ≤ 50 % | 100 | |
Bladder | V44Gy ≤ 20 % | 100 |
V30Gy ≤ 50 % | 100 | |
Femoral heads | V23Gy ≤ 50 % | 80 |
Boost plan | ||
Boost PTV | D100% ≥ 99.5 % of the prescription dose | 150 |
D98% ≥ 100 % of the prescription dose | 150 | |
D2% ≤ 101 % of the prescription dose | 150 | |
Dmax ≤ 102 % of the prescription dose | 150 | |
Rectal wall | V22Gy ≤ 20 % | 100 |
V18Gy ≤ 50 % | 100 | |
Bladder | V22Gy ≤ 20 % | 100 |
V18Gy ≤ 50 % | 100 | |
Femoral heads | V12Gy ≤ 50 % | 80 |