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Table 6 The DC and SP of GGNs under different conditions

From: Effects of tube voltage, radiation dose and adaptive statistical iterative reconstruction strength level on the detection and characterization of pulmonary nodules in ultra-low-dose chest CT

GGNs

 

kV

30%ASiR-V

50%ASiR-V

70%ASiR-V

FBP

P

mean

DC/%

Dose-1

70

24.53

20.09

18.65

20.25

> 0.05

20.85

  

100

14.79

15.85

12.14

13.89

> 0.05

14.16

 

P

 

0.008

> 0.05

> 0.05

> 0.05

  
 

Dose-2

70

12.27

11.33

11.09

16.69

> 0.05

12.86

  

100

9.64

9.65

10.49

11.85

> 0.05

10.40

 

P

 

> 0.05

> 0.05

> 0.05

> 0.05

  
 

Dose-3

70

11.86

10.84

9.40

13.83

> 0.05

11.67

  

100

7.49

7.50

7.36

9.56

> 0.05

7.98

 

P

 

0.024

> 0.05

> 0.05

> 0.05

  

GGNs

 

kV

30%ASiR-V

50%ASiR-V

70%ASiR-V

FBP

P

mean

SP/%

Dose-1

70

10.66

9.10

7.95

9.45

> 0.05

9.29

  

100

7.43

7.65

5.96

5.98

> 0.05

6.76

 

P

 

> 0.05

> 0.05

> 0.05

0.030

  
 

Dose-2

70

6.39

4.96

4.87

5.76

> 0.05

5.50

  

100

5.15

4.46

5.54

5.26

> 0.05

5.10

 

P

 

> 0.05

> 0.05

> 0.05

> 0.05

  
 

Dose-3

70

6.25

5.75

4.10

6.72

> 0.05

5.82

  

100

3.49

3.14

3.46

3.22

> 0.05

3.33

 

P

 

0.014

0.023

> 0.05

0.03

  
  1. PS: SP: size measurement deviation percentage; DC: deformation coefficient; GGNs: Ground glass nodules; SNs: Solid nodules