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Table 3 Objective assessment of image quality

From: Application of deep learning reconstruction combined with time-resolved post-processing method to improve image quality in CTA derived from low-dose cerebral CT perfusion data

 

R-HIR

L-HIR

L-DLR

L-DLRtMIP

L-DLRtAve

R-HIR

vs.

L-HIR

R-HIR

vs.

L-DLR

R-HIR

vs.

L-DLRtMIP

R-HIR

vs.

L-DLRtAve

CT

ICAs

702.72

(167.65)

619.88

(144.06)

759.10

(193.51)

823.1

(210.08)

707.25

(176.66)

0.05

0.09

0.003

0.56

MCAs

657.18

(162.78)

605.21

(129.82)

739.13

(183.32)

754.35

(179.45)

678.81

(165.15)

0.26

0.06

0.03

0.33

BA

643.86

(163.33)

539.20

(142.49)

666.02

(196.99)

739.14

(176.30)

623.15

(166.03)

0.12

0.65

0.04

0.64

BS

51.90

(5.06)

54.76

(5.22)

46.15

(5.36)

52.61

(4.59)

45.50

(4.83)

0.04

<0.001

0.58

<0.001

SD

ICAs

10.24

(3.80)

28.68

(15.97)

39.91

(21.57)

39.09

(22.19)

32.39

(20.14)

<0.001

<0.001

<0.001

<0.001

MCAs

10.31

(4.47)

24.99

(9.85)

25.19

(10.27)

26.11

(12.69)

17.83

(9.36)

<0.001

<0.001

<0.001

0.002

BA

10.23

(5.08)

43.87

(19.14)

42.00

(20.38)

46.44

(19.21)

39.08

(16.20)

<0.001

<0.001

<0.001

<0.001

BS

10.09

(3.20)

14.30

(1.63)

9.39

(1.35)

7.70

(1.45)

6.07

(1.10)

<0.001

0.28

0.001

<0.001

SNR

ICAs

81.09

(45.15)

27.26

(13.66)

24.73

(12.49)

26.24

(12.36)

28.97

(15.97)

<0.001

<0.001

<0.001

<0.001

MCAs

82.26

(52.88)

27.59

(11.77)

32.54

(12,01)

33.69

(12.27)

45.43

(18.07)

<0.001

<0.001

<0.001

<0.001

BA

79.62

(42.84)

14.59

(8.06)

19.57

(13.20)

17.79

(7.34)

20.02

(13.07)

<0.001

<0.001

<0.001

<0.001

BS

5.72

(2.12)

3.87

(0.48)

5.00

(0.82)

7.00

(1.12)

7.65

(1.22)

<0.001

0.62

0.002

<0.001

CNR

ICAs

73.54

(37.03)

40.03

(10.61)

77.19

(21.64)

101.43

(25.42)

110.66

(29.69)

<0.001

0.05

<0.001

<0.001

MCAs

68.51

(35.08)

38.80

(9.65)

76.11

(21.38)

93.22

(25.13)

106.19

(24.55)

<0.001

0.09

0.002

<0.001

BA

67.45

(36.10)

34.32

(10.22)

66.95

(21.34)

88.76

(24.39)

96.55

(27.46)

<0.001

0.38

0.001

<0.001

  1. BA, basilar artery; BS, brainstem; CNR, contrast-to-noise ratio; DLR, Deep learning reconstruction; HIR, Hybrid iterative reconstruction; ICAs, internal carotid arteries; SNR, signal-to-noise ratio; tAve, time-resolved average; tMIP, time-resolved maximum intensity projection