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Table 3 Qualitative analysis

From: Dual-energy CT with virtual monoenergetic images and iodine maps improves tumor conspicuity in patients with pancreatic ductal adenocarcinoma

 

Hypoattenuating tumor

Isoattenuating tumor

40 keV

50 keV

60 keV

70 keV

80 keV

PEI

Kappa

40 keV

50 keV

60 keV

70 keV

80 keV

PEI

Kappa

Tumor conspicuity

*4.8 ± 0.4

*4.6 ± 0.5

*3.9 ± 0.4

3.3 ± 0.5

2.7 ± 0.5

3.4 ± 0.6

0.71

*3.8 ± 0.4

*3.6 ± 0.4

3.2 ± 0.3

2.8 ± 0.4

2.6 ± 0.4

2.9 ± 0.3

0.60

Tumor margin sharpness

*4.7 ± 0.4

*4.3 ± 0.7

*3.6 ± 0.5

2.9 ± 0.6

2.5 ± 0.4

3.1 ± 0.5

0.68

*3.7 ± 0.4

*3.5 ± 0.4

3.2 ± 0.4

2.7 ± 0.4

2.4 ± 0.4

2.7 ± 0.4

0.66

Image quality

*4.0 ± 0.3

*4.6 ± 0.5

*3.4 ± 0.5

3.2 ± 0.4

2.8 ± 0.4

3.2 ± 0.3

0.67

*3.8 ± 0.3

*4.4 ± 0.6

3.5 ± 0.5

3.2 ± 0.3

2.9 ± 0.3

3.2 ± 0.4

0.69

Depiction of arteries

*5.0 ± 0

*4.8 ± 0.4

4.3 ± 0.5

3.6 ± 0.5

3.2 ± 0.4

4.3 ± 0.6

0.80

*5.0 ± 0

*4.8 ± 0.4

4.2 ± 0.3

3.6 ± 0.5

3.2 ± 0.4

4.2 ± 0.4

0.71

Depiction of veins

*4.5 ± 0.5

*4.2 ± 0.6

3.5 ± 0.5

3.2 ± 0.3

2.5 ± 0.5

3.4 ± 0.4

0.70

*4.6 ± 0.5

*4.3 ± 0.4

3.6 ± 0.4

3.2 ± 0.4

2.7 ± 0.4

3.6 ± 0.5

0.70

  1. Data are expressed as mean ± SD
  2. The arteries include celiac trunk, common hepatic artery, and superior mesenteric artery. The veins include portal vein and superior mesenteric vein
  3. *MEI ( +) > PEI in the qualitative image quality (p < 0.05)