. 2022 Mar 23;12(4):782. doi: 10.3390/diagnostics12040782

Table 2.

Quantitative measurements of peristalsis-related streak artifacts on the liver on conventional 120 kVp images, 40 keV monoenergetic images, 200 keV monoenergetic images, virtual non-contrast (VNC) images, and iodine images.

Image Reconstructions	Quantitative Artifact Measurements			p-Values
Image Reconstructions	Mean ROI_max	Mean ROI_min	Mean ROI_ref	Mean ROI_max Compared with Mean ROI_ref	Mean ROI_min Compared with Mean ROI_ref
120 kVp	129 HU	80 HU	101 HU	p < 0.001	p < 0.001
40 keV	232 HU	168 HU	201 HU	p < 0.001	p < 0.001
200 keV	91 HU	48 HU	67 HU	p < 0.001	p < 0.001
VNC	87 HU	45 HU	61 HU	p < 0.001	p < 0.001
iodine	1.72 mg/mL	1.44 mg/mL	1.68 mg/mL	p = 0.23	p < 0.001

ROI_max (regions of interest measurement in the most visibly bright area of the streak artifact). ROI_min (regions of interest measurement in the most visibly dark area of the streak artifact). ROI_ref (regions of interest measurement in the neighboring liver parenchyma not affected by artifacts).