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Table 3 Dose parameters for the humeral head + 10 mm PRV

From: Elective breast radiotherapy including level I and II lymph nodes: A planning study with the humeral head as planning risk volume

 

HTF

HTF – HTF hh p-value

HTF hh

HTF hh – IMRT

p-value

IMRT

IMRT – VMAT p-value

VMAT

HTF hh – VMAT

p-value

Dmin (Gy)

1.6 (0.8–3.2)

≤0.01

1.4 (0.8–2.1)

0.01

1.1 (0.5–1.8)

0.21

1.1 (0.4–1.9)

0.08

Dmean (Gy)

14.8 (3.8–27.8)

≤0.01

10.1 (3.8–15.5)

0.80

10.8 (2.8–19.7)

0.41

11.5 (2.6–19.9)

0.24

Dmax (Gy)

42.7 (38.2–44.6)

≤0.01

40.3 (38.2–41.9)

0.24

40.8 (38.5–42.3)

0.28

40.6 (38.1–42.2)

0.38

D0.5cc (Gy)

42.2 (36.8–43.9)

≤0.01

39.0 (34.6–40.7)

0.72

39.6 (36.2–41.2)

0.20

39.2 (34.8–40.7)

0.44

D2% (Gy)

40.9 (29.8–43.5)

≤0.01

36.2 (29.8–39.6)

0.26

37.3 (28.8–39.4)

0.17

36.9 (26.6–39.8)

0.92

D98% (Gy)

1.9 (0.9–3.7)

≤0.01

1.5 (0.8–2.3)

≤0.01

1.2 (0.5–2.1)

0.16

1.2 (0.5–2.1)

≤0.01

V50% (%)

28.6 (3.4–59.9)

≤0.01

15.6 (3.4–35.4)

0.11

23.8 (3.1–47.2)

0.38

25.9 (2.4–50.3)

0.08

  1. HTF High tangential fields, HTF hh HTF with sparing of the humeral head. Values are averages with the range indicated in brackets. p-values are written in bold when statistical significance is reached (p ≤ 0.0125)