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Table 3 Conformity index (CI), dose homogeneity index (DHI), tumor control probability (TCP), normal tissue complication probably (NTCP) and normal tissue dose metrics for the nasal cavity patients.

From: Preliminary comp arison of helical tomotherapy and mixed beams of unmodulated electrons and intensity modulated radiation therapy for treating superficial cancers of the parotid gland and nasal cavity

Patient

Plan

(IMRT:e)

PTV

Normal Tissues

  

CI

DHI

TCP

(%)

L. Lens

R. Lens

L. Eye

R. Eye

     

Dmean

(Gy)

NTCP

(%)

Dmax

(Gy)

NTCP

(%)

Dmax

(Gy)

Dmax

(Gy)

3

HT

0.80

0.07

100

8.0

0.3

14.9

2.8

40.5

37.6

 

1:0

0.76

0.09

100

8.9

0.6

9.9

0.6

36.0

39.2

 

2:1

0.84

0.09

100

11.0

2.2

9.6

0.8

32.1

33.2

 

1:1

0.85

0.10

100

10.6

2.6

9.8

0.9

32.3

33.8

 

1:2

0.85

0.11

100

8.8

0.6

8.0

0.4

27.5

32.3

 

1:3

0.83

0.09

100

6.6

0.3

8.5

0.4

28.4

33.5

 

1:4

0.82

0.10

100

7.6

0.6

9.2

0.5

30.2

33.0

 

0:1

0.75

0.29

99.9

4.3

0.1

7.8

0.2

22.7

30.0

4

HT

0.80

0.04

100

2.9

0.1

3.5

0.1

6.4

8.6

 

1:0

0.75

0.14

100

3.5

0.1

4.0

0.1

22.0

9.1

 

2:1

0.60

0.07

100

2.8

0.1

4.0

0.1

12.3

9.1

 

1:1

0.72

0.08

100

3.3

0.1

4.4

0.1

12.7

8.7

 

1:2

0.68

0.08

100

3.3

0.1

3.9

0.1

12.0

10.1

 

1:3

0.79

0.10

100

3.6

0.1

3.9

0.1

10.1

7.8

 

1:4

0.73

0.09

100

2.7

0.1

3.7

0.1

10.6

9.7

 

0:1

0.57

0.19

100

1.8

< 0.1

2.3

< 0.1

17.1

8.4

  1. Beam weightings indicate the ratio of IMRT-to-electron dose of the treatment plans. Abbreviations: PTV = planning target volume; Cont. = contralateral; Ips. = ipsilateral; R. = right; L. = left.