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Table 4 Dosimetric indices and comparative analysis for Planning Target Volume (PTV) and different organs at risk for manual and automated plans

From: Auto- versus human-driven plan in mediastinal Hodgkin lymphoma radiation treatment

Structure

Dose Index

Median (range)

p-value< 0.05a

Manual-BF

Pinnacle3Auto-Planning

1

AP-BF

AP-ARC

1vs.2,3

2vs.3

2

3

PTV

HI

0.12 (0.09–0.16)

0.16 (0.1–0.22)

0.13 (0.09–0.18)

1 < 2

2 > 3

CI

0.95 (0.94–0.96)

0.95 (0.94–0.95)

0.95 (0.95–0.97)

–

–

Heart

Dmean (Gy)

3.8 (0.2–8.7)

3.3 (0.2–7.2)

3 (0.1–6.3)

1 > 2,3

2 > 3

D2% (Gy)

28.4 (0.4–31.5)

28.3 (0.4–31.3)

26.8 (0.3–30.2)

1 > 3

2 > 3

Left Ventricle

Dmean (Gy)

1 (0.1–3.1)

0.7 (0.1–1.6)

0.8 (0.1–1.7)

1 > 2,3

–

LAD

D50% (Gy)

1.3 (0.0–25.7)

0.8 (0.0–11.9)

1 (0.0–13.7)

1 > 2

–

Lungs

Dmean (Gy)

6.3 (1.6–9.2)

4.5 (1.4–5.9)

4.6 (1.4–6.0)

1 > 2,3

–

V5Gy (%)

32.0 (7.5–52.4)

20.9 (6.3–29.0)

23.7 (7.7–35.0)

1 > 2

2 < 3

V20Gy (%)

11.6 (2.6–18.5)

8.4 (2.0–12.3)

7.2 (1.0–9.7)

1 > 3

2 > 3

Thyroid

Dmean (Gy)

16.8 (11.9–28.4)

15.4 (10.1–25.7)

15.5 (9.6–21.2)

1 > 2,3

–

V30Gy (%)

19.6 (7.9–51.3)

19.2 (8.7–27.9)

14.0 (3.7–22.5)

–

–

Breast

Dmean (Gy)

1.1 (0.1–2.3)

0.4 (0.1–1.2)

0.6 (0.1–1.6)

1 > 2,3

2 < 3

Normal Tissue

Dmean (Gy)

2.9 (1.5–5.4)

2.4 (1.4–3.8)

2.4 (1.2–3.7)

1 > 2

 
  1. Abbreviations: PTV planning Target Volume, HI Homogeneity Index, Conformity Index, Dmean mean dose, D2% near maximum dose, D50% median dose, VX percentage volume exceeding X, LAD Left Anterior Descending artery
  2. aFriedman and Dunn tests