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Table 3 Dose comparisons in targets and normal tissues.

From: Use of kilovoltage X-ray volume imaging in patient dose calculation for head-and-neck and partial brain radiation therapy

Patients

1st kVCBCT (Gy)

kVCT

(Gy)

Difference

(%)

NK-T lymphoma

(patient1)

1PTV: mean dose

51.03

51.28

0.49%

 

1Right-eye: mean dose

11.68

11.76

0.70%

 

1Left-eye: mean dose

10.54

10.58

0.37%

 

1Spinal cord: max dose

47.14

47.65

1.07%

 

1Whole body: max dose

59.18

59.44

-0.43%

NPC

(patient2)

2GTV: mean dose

67.8

67.78

-0.03%

 

2CTV: mean dose

64.9

64.89

-0.02%

 

2PTV: mean dose

63.76

63.78

0.03%

 

2Brain Stem: max dose

53.83

54.36

0.98%

 

2Spinal cord: max dose

32.85

32.73

-0.34%

 

2L-parotid: mean dose

34.92

34.11

-2.37%

 

2R-parotid: mean dose

33.38

32.91

-1.41%

 

2Whole body: max dose

70.73

70.12

0.87%

Brain Tumor

(patient3)

3CTV: mean dose

61.85

61.84

-0.02%

 

3PTV: mean dose

60.64

60.57

-0.11%

 

3Brain: max dose

50.13

50.02

-0.22%

 

3Left-eye: mean dose

19.42

19.4

-0.13%

 

3Right-eye: mean dose

9.94

9.64

-3.15%

 

3Whole body: max dose

67.21

67.66

0.66%

  1. Dose comparisons of the first kVCBCT to the planning kVCT in targets and normal tissues for the three clinical cases (NK-T lymphoma, NPC and Brain Tumor). The difference of maximal dose in tumor is 0.49% and in normal structures are -3.15%. The numbers before the contours are the indexes of patients, 1PTV means the PTV in patient1.