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Table 2 Quantitative analysis

From: Image quality comparison of lower extremity CTA between CT routine reconstruction algorithms and deep learning reconstruction

Parameter

DLR

MBIR

HIR

FBP

p*

Aorta

     

HU

488.70 ± 105.57

462.89 ± 95.56*

481.51 ± 103.93*°

488.44 ± 104.49°˜

0.55

SD

17.42 ± 12.89

32.08 ± 9.89*

25.63 ± 13.42*°

53.06 ± 10.86*°˜

 < 0.001

SNR

35.65 ± 13.94

15.24 ± 4.28*

21.50 ± 7.57*°

9.56 ± 2.95*°˜

 < 0.001

CNR

48.28 ± 11.12

25.07 ± 5.60*

33.42 ± 8.62*°

15.84 ± 4.41*°˜

 < 0.001

Femoral artery

     

HU

491.40 ± 142.18

446.60 ± 167.26*

451.23 ± 172.31*°

460.10 ± 178.17*°˜

 < 0.001

SD

32.42 ± 26.44

35.73 ± 23.36*

38.17 ± 25 ± 25*

51.98 ± 22.27*°˜

 < 0.001

SNR

23.10 ± 14.79

15.60 ± 8.69*

15.49 ± 11.30*

9.91 ± 5.00*°˜

 < 0.001

CNR

47.24 ± 15.04

24.03 ± 8.66*

31.12 ± 11.85*°

15.00 ± 6.38*°˜

 < 0.001

Popliteal artery

     

HU

402.64 ± 170.65

377.33 ± 160.73*

367.05 ± 154.54*°

374.93 ± 159.45* ˜

 < 0.001

SD

43.90 ± 40.21

41.15 ± 37.73

41.58 ± 31.86

47.64 ± 33.59*°˜

 < 0.001

SNR

15.80 ± 12.33

14.86 ± 14.86

12.89 ± 8.87*

10.99 ± 8.60*°˜

 < 0.001

CNR

39.64 ± 15.47

20.47 ± 8.1*

25.87 ± 10.53*°

12.44 ± 5.58*°˜

 < 0.001

Liver

     

HU

66.55 ± 9.12

66.94 ± 9.03

66.22 ± 9.59

67.91 ± 9.65*°˜

 < 0.001

SD

11.32 ± 2.59

28.41 ± 3.52*

18.90 ± 2.39*°

49.46 ± 10.20*°˜

 < 0.001

SNR

6.11 ± 1.41

2.40 ± 0.52*

3.56 ± 0.78*°

1.40 ± 0.27*°˜

 < 0.001

CNR

13.95 ± 2.53

7.58 ± 1.50*

9.72 ± 1.99*°

4.54 ± 0.88*°

 < 0.001

Psoas muscle

     

HU

57.79 ± 8.05

58.24 ± 8.06

57.61 ± 7.98°

59.58 ± 8.01*°˜

 < 0.001

SD

10.46 ± 1.34

24.88 ± 3.36*

17.52 ± 2.29*°

43.91 ± 6.02*°˜

 < 0.001

SNR

5.67 ± 1.36

2.40 ± 0.54*

3.37 ± 0.83*°

1.38 ± 0.29*°˜

 < 0.001

CNR

13.22 ± 2.32

7.18 ± 1.40*

9.21 ± 1.81*°

4.32 ± 0.87*°˜

 < 0.001

  1. DLR deep learning–based reconstruction, MBIR model-based iterative reconstruction, HIR hybrid-iterative reconstruction, FBP filtered back projection
  2. Pairwise comparisons showed significant differences from DLR (*), MBIR (°), and HIR (˜) (p < 0.05)