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Table 4 Ratios of increase in CNR on each VM image compared to 65-keV VM image with 300-mgI/ml concentration contrast material as baseline CNR

From: Effects of High-concentration contrast material and low-voltage CT on contrast for multiphasic CT of the upper abdomen: comparison using the simulation with virtual monochromatic imaging obtained by fast-switch kVp dual-energy CT

  

Group A

Group B

 
 

Phase

50 keV

65 keV

50 keV

Aorta

Early arterial

1.11

1.21

1.34

 

Late arterial

1.13

0.81

0.93

 

Portal venous

1.23

1.01

1.20

Portal vein

Early arterial

1.37

1.41

1.77

 

Late arterial

1.16

0.99

1.15

 

Portal venous

1.16

1.02

1.20

Hepatic

Early arterial

1.01

1.26

1.14

Parenchyma

Late arterial

1.07

0.94

1.02

 

Portal venous

1.08

0.91

1.02

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