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Table 3 Comparison of per cent contrasts (%) of all spheres among three different correction combinations

From: Impacts of acquisition and reconstruction parameters on the absolute technetium quantification of the cadmium–zinc–telluride-based SPECT/CT system: a phantom study

 

Correction combination

37 mm

28 mm

22 mm

17 mm

13 mm

10 mm

P value

32:1

AC + SC + RR

88.95

80.36

77.35

71.82

59.65

54.13

 
 

AC + RR

73.37

65.86

64.64

56.71

46.45

43.12

 < 0.001a

 

AC + SC

58.30

42.81

32.41

15.69

8.91

7.41

 < 0.001b

16:1

AC + SC + RR

92.82

79.25

85.58

62.21

59.91

48.74

 
 

AC + RR

76.85

64.98

71.41

51.78

51.15

37.85

 < 0.001a

 

AC + SC

80.79

66.69

60.76

43.97

28.20

23.83

0.001b

8:1

AC + SC + RR

78.65

71.05

64.37

57.63

43.49

39.34

 
 

AC + RR

69.73

65.77

50.55

52.58

37.50

32.00

0.002a

 

AC + SC

77.93

63.92

38.94

38.93

28.40

22.11

0.011b

4:1

AC + SC + RR

99.94

76.67

72.83

66.09

45.03

65.30

 
 

AC + RR

80.81

62.67

64.85

51.79

39.67

45.96

0.002a

 

AC + SC

77.03

63.33

41.89

38.29

9.28

40.53

 < 0.001b

  1. Reconstruction parameters: 35 iterations, 20 subsets, no filter; Acquisition parameters: 120 s/frame of acquisition time, 15% energy window; AC, attenuation correction; SC, scatter correction; RR, resolution recovery correction; a, AC + SC + RR vs. AC + RR; b, AC + SC + RR vs. AC + SC