Table 3.
Complexity vs quality | Complexity vs γ(2D/3D) | Plan quality vs γ(2D/3D) | Complexity vs γ(IV) | Plan quality vs γ(IV) | ||||
---|---|---|---|---|---|---|---|---|
Canonical variate 1 | Canonical variate 1 | Canonical variate 2 | Canonical variate1 | Canonical variate1 | Canonical variate 2 | Canonical variate 1 | ||
Complexity parameter | ||||||||
MU/CP | −0.49 | −0.15 | −1.57 | −1.69 | 0.53 | |||
%MU/CP < 3 | −0.02 | 0.28 | −0.68 | −0.46 | 0.23 | |||
SA(cm2)/CP | 0.34 | −1.14 | −2.85 | 1.63 | 2.04 | |||
%SA < 5 × 5 cm2 | 0.18 | 0.19 | −0.85 | 0.87 | 0.66 | |||
MCSv/Beam(Arc) | 0.26 | 0.66 | 0.17 | −0.44 | −0.13 | |||
LT (mm/Arc) | −0.28 | 0.68 | −0.79 | 0.98 | 1.30 | |||
PTV volume | −0.006 | 0.39 | 1.38 | −0.99 | −1.39 | |||
Plan quality | ||||||||
GTVV95% | −0.51 | −0.77 | −0.26 | |||||
PTVV95% | 0.42 | −0.1 | −0.44 | |||||
GTVHI | 3.70 | −4.33 | −8.08 | |||||
PTVHI | 0.42 | −0.54 | −0.59 | |||||
CI | 6.28 | −6.05 | −12.86 | |||||
CN | −5.81 | 5.54 | 11.96 | |||||
Rectum Dmean | 0.31 | 0.09 | −0.64 | |||||
Rectum V50 | −0.50 | 0.1 | 0.86 | |||||
Bladder Dmean | −0.44 | 0.07 | 0.48 | |||||
Bladder D40 | 0.42 | 0.03 | −0.66 | |||||
Rfemoral D3 | 0.83 | −0.61 | −0.38 | |||||
Lfemoral D3 | −3.20 | −0.04 | 0.81 | |||||
Deliverability (2D/3D gamma indices) | Individual volume-based 3D gamma indices γ(IV) | |||||||
2D 4%/4 mm | 0.86 | 0.81 | 0.69 | 0.009 | −0.95 | −0.49 | γGTV | |
2D 3%/3 mm | −0.80 | −0.86 | −0.07 | 0.37 | −0.56 | −1.16 | γCTV | |
2D 2%/2 mm | −0.24 | −0.11 | −1.14 | 0.35 | 0.58 | 0.84 | γPTV | |
3D 4%/4 mm | −0.48 | −0.30 | 0.03 | 0.55 | 0.18 | −0.52 | γRectum | |
3D 3%/3 mm | 0.11 | 1.51 | 0.26 | 0.69 | 0.11 | −0.10 | γlfemoral | |
3D 2%/2 mm | −0.25 | −0.47 | 0.56 | 0.19 | 0.11 | 0.32 | γr femoral | |
−0.82 | 0.18 | 0.39 | γbladder |
%MU/CP < 3 = the proportion of MU/CP less than 3, %SA < 5 × 5 cm2 = the proportion of SA less than 5 × 5 cm2, GTVV95% = the percentage volume of the GTV covered by the the 95% prescription isodose line, PTVV95% = the percentage volume of the PTV covered by the 95% prescription isodose line, GTVHI = the HI of the GTV, PTVHI = the HI of the PTV, lfemoral = left femoral head, rfemoral = right femoral head.