Table 1 Statistical results of dose parameters for PTV in pitch factors: P1, P2, and P3.

From: A case study on optimizing helical tomotherapy parameters for small cell lung cancer with extensive pleural metastasis

 

F1

F2

F3

P1

P2

P3

p

P1

P2

P3

p

P1

P2

P3

p

D95%

39.38 \(\pm\) 0.15

39.52 \(\pm\) 0.18

39.63 \(\pm\) 0.20

\(<\) 0.05

39.32 \(\pm\) 0.23

39.46 \(\pm\) 0.24

39.57 \(\pm\) 0.25

\(<\) 0.05

39.26 \(\pm\) 0.08

39.32 \(\pm\) 0.09

39.45 \(\pm\) 0.08

0.16

D90%

39.74 \(\pm\) 0.05

39.89 \(\pm\) 0.04

39.99 \(\pm\) 0.04

\(<\) 0.05

39.81 \(\pm\) 0.2

39.94 \(\pm\) 0.16

40.07 \(\pm\) 0.13

\(<\) 0.05

39.92 \(\pm\) 0.06

40.0 \(\pm\) 0.03

40.14 \(\pm\) 0.03

\(<\) 0.05

D2%

41.81 \(\pm\) 0.15

41.91 \(\pm\) 0.15

42.06 \(\pm\) 0.15

\(<\) 0.05

41.97 \(\pm\) 0.63

42.15 \(\pm\) 0.61

42.43 \(\pm\) 0.55

\(<\) 0.05

42.64 \(\pm\) 0.2

42.85 \(\pm\) 0.19

43.32 \(\pm\) 0.21

\(<\) 0.05

CI

1.62 \(\pm\)

0.06

1.46 \(\pm\)

0.03

1.39 \(\pm\)

0.02

\(<\) 0.05

1.51 \(\pm\)

0.14

1.43 \(\pm\)

0.09

1.41 \(\pm\)

0.08

0.21

1.50 \(\pm\)

0.02

1.49 \(\pm\)

0.03

1.48 \(\pm\)

0.02

\(<\) 0.05

HI

1.13 \(\pm\)

0.04

1.14 \(\pm\)

0.04

1.14 \(\pm\)

0.04

0.67

1.12 \(\pm\)

0.03

1.13 \(\pm\)

0.04

1.13 \(\pm\)

0.02

0.49

1.14 \(\pm\)

0.01

1.14 \(\pm\)

0.01

1.15 \(\pm\)

0.01

0.46

  1. * Mean values \(\pm\) Standard deviation; P1: 0.215, P2: 0.287, P3:0.43; F1:1 cm, F2: 2.5 cm, F3: 5 cm; D*% was in Gy; CI Conformity index; HI Homogeneity index.
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