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Table 2 Dose characteristics of the PartArc and AvoidArc plans selected for the models' input. Values are the average of the 20 patients cohort. Uncertainty is reported as one standard deviation

From: Knowledge-based DVH estimation and optimization for breast VMAT plans with and without avoidance sectors

Structure

Dosimetric parameter and goal

PartArc plans

AvoidArc plans

PTV

V95% > 95% [%]

97.0 ± 1.2

95.8 ± 0.6 +

V105% < 3% [%]

0.7 ± 0.7

2.0 ± 0.8 +

D98% > 90% [%]

94.1 ± 1.0

93.4 ± 0.6 +

Heart

Mean < 4 Gy [Gy]

2.2 ± 0.4

1.9 ± 0.7 +

V18Gy < 5% [%]

0.0 ± 0.0

0.1 ± 0.3

Lung_Homolat

Mean < 8 Gy [Gy]

5.4 ± 0.5

6.2 ± 0.8 +

V20Gy < 10% [%]

6.9 ± 1.0

10.2 ± 2.0 +

Lung_Contralat

Mean < 2 Gy (1 Gy)* [Gy]

1.4 ± 0.5

0.3 ± 0.1 +

Breast_Contralat

Mean < 3 Gy (1 Gy)* [Gy]

1.7 ± 0.5

0.4 ± 0.1 +

  1. *the goal within brackets is in case of enhanced contralateral structures sparing
  2. +p < 0.01 (Wilcoxon Signed Rank test)