Table 2 Comparison between various metrics in planning phase I. The data are the median and range values of the five patients included into the study. PTV_70+PET corresponds to the PTV₇₀ encompassing the PTV_PET, while PTV₇₀ is the part of the PTV₇₀ outside of the PTV_PET. In a similar way, PTV₅₆ is the part of the PTV₅₆ outside of the PTV₇₀

QVH indexes

V_Q=0.95 (%)

98.7–100.0

92.7–97.6

0.043

V_Q=1.05 (%)

0.0–0.2

2.0–4.9

0.043

QF (%)

1.2–1.8

1.8–2.3

0.043

PTV_70+PET

D_98% (Gy)

67.0–67.8

66.7–67.8

n.s.

D_95% (Gy)

67.7–68.4

67.5–68.5

n.s.

D_50% (Gy)

70.0–70.4

69.8–70.3

n.s.

D_2% (Gy)

74.9–81.3

76.3–82.2

n.s.

V_95% (%)

99.1–99.8

98.3–99.8

n.s.

HI

0.1–0.2

0.1–0.2

n.s.

PTV₇₀

D_98% (Gy)

66.9–67.8

66.6–67.7

n.s

D_95% (Gy)

67.5–68.3

67.4–68.4

n.s

D_50% (Gy)

69.8–70.4

69.7–70.3

n.s

D_2% (Gy)

72.0–72.5

70.8–72.0

0.043

V_95% (%)

98.9–99.8

98.1–99.8

n.s

V_107% (%)

0.0–0.0

0.0–0.1

n.s

HI

0.1–0.1

0.0–0.1

n.s

PTV₅₆

D_98% (Gy)

53.9–54.6

53.9–54.9

n.s.

D_95% (Gy)

54.4–54.9

54.3–55.2

n.s.

D_50% (Gy)

56.4–57.0

55.8–56.2

0.043

D_2% (Gy)

67.4–68.5

65.9–68.2

0.043

V_95% (%)

99.2–99.9

99.5–99.9

n.s.

V_107% (%)

11.7–21.7

9.8–20.3

n.s.

HI

0.2–0.3

0.2–0.3

n.s.

PRV SC

D_2% (Gy)

47.1–47.8

43.0–47.6

-^a

PRV BS

D_2% (Gy)

34.0–47.2

25.4–43.4

-^a

Ipsilateral parotid

D_mean (Gy)

28.5–29.5

27.1–29.8

-^a

Contralateral parotid

D_mean (Gy)

23.9–25.1

21.3–25.2

-^a

Conformity Index

CI PTV₇₀

1.2–1.2

1.1–1.2

n.s.

CI PTV₅₆

1.6–2.0

1.4–1.8

0.043